Heart Health and Blood Pressure: The Complete Guide

What You Need to Know

• Nearly half of US adults (47.7%) have blood pressure at or above 130/80 or take medication for it, and only 59.2% of them know it (CDC NCHS Data Brief 511, NHANES 2021 to 2023).
• Normal blood pressure is below 120/80 mmHg; 130 to 139 systolic or 80 to 89 diastolic is stage 1 high blood pressure under the 2017 ACC/AHA guideline (Whelton 2017, Hypertension), and NHLBI lists the same cutoffs today.
• Measurement errors are large: a standard cuff on an arm that needs an extra-large one overstated systolic pressure by 19.5 mmHg (Ishigami 2023, JAMA Internal Medicine), and resting the arm in the lap added 3.9 mmHg (Liu 2024, JAMA Internal Medicine).
• Sodium works in days: one week at about 500 mg of sodium a day lowered systolic pressure 8 mmHg compared with a high-sodium week in 213 adults aged 50 to 75, whether or not they took blood pressure medication (Gupta 2023, JAMA).
• Isometric exercise such as wall squats lowered resting blood pressure 8.24/4.00 mmHg, the largest effect of any exercise type in a network meta-analysis of 270 randomized trials (Edwards 2023, British Journal of Sports Medicine).
• Supplement effects are small: magnesium at a median 368 mg a day lowered blood pressure 2.00/1.78 mmHg across 34 trials (Zhang 2016, Hypertension), and CoQ10 showed no significant effect on blood pressure in the Cochrane review (Ho 2016).
• Fish oil at 1 g a day did not reduce major cardiovascular events in 25,871 adults over 5.3 years (Manson 2018, New England Journal of Medicine), and omega-3 supplements raised atrial fibrillation risk 25% across seven trials (Gencer 2021, Circulation).

What does blood pressure measure, and why does it matter?

Blood pressure is the force your blood puts on artery walls, written as two numbers in millimeters of mercury (mmHg). Systolic, the top number, is the peak while the heart squeezes. Diastolic, the bottom, is the floor between beats. Three controls set both: how hard the heart pumps, how tightly small arteries constrict, and how much salt and water the kidneys keep.

One enormous dataset shows why it matters. Pooling one million adults from 61 prospective studies, each 20 mmHg of higher usual systolic pressure was linked to more than double the stroke death rate and double the coronary death rate at ages 40 to 69, with no sign of a threshold down to at least 115/75 (Lewington 2002, Lancet). Risk climbs smoothly through numbers most people call normal.

The encouraging half is just as large. Across 123 drug trials and 613,815 people, every 10 mmHg drop in systolic pressure cut major cardiovascular events 20%, stroke 27%, and deaths from any cause 13% (Ettehad 2015, Lancet). Those trials tested medication, but the lesson carries: the size of the drop decides the size of the benefit.

Heart health is broader than one number: cholesterol, blood sugar, smoking, and fitness act on the same arteries, and cardiovascular disease caused 919,032 American deaths in 2023, about one in three (CDC). Blood pressure gets the most room here because you can measure it at home and move it within a week.

Go deeper: fitting heart-healthy training into a packed schedule, a lighter read for people with more job than time.

How many people have blood pressure above the healthy range?

Almost half of American adults. In the 2021 to 2023 National Health and Nutrition Examination Survey (NHANES, the CDC's exam-based national survey), 47.7% of adults read 130/80 or higher or took medication for it, men more often than women (50.8% versus 44.6%), according to CDC NCHS Data Brief 511. Age dominates: 23.4% of adults 18 to 39, 52.5% at 40 to 59, and 71.6% at 60 and older.

Awareness is the more worrying number. Only 59.2% of those adults knew it, and just 20.7% had their pressure under 130/80 (same brief). Four in ten had no idea, which is why the cuff, not how you feel, is the test.

The risk factors read like ordinary habits. Age and family history are fixed; sodium is not, and Americans average over 3,300 mg a day against a 2,300 mg limit (CDC). Potassium runs short, with adult women averaging 2,320 mg from food against an adequate intake of 2,600 mg (NIH Office of Dietary Supplements). Excess weight, more than two drinks a day, inactivity, and some medications push numbers up too.

Go deeper: what aging changes inside cells, and why exercise helps there too.

What is a normal blood pressure reading, and how do you measure it right?

Normal is below 120/80 mmHg. The categories come from the 2017 ACC/AHA guideline (Whelton 2017, Hypertension). A 2025 AHA/ACC guideline has since replaced that document (Jones 2025, Journal of the American College of Cardiology), and the National Heart, Lung, and Blood Institute uses the same cutoffs (NHLBI).

One reading diagnoses nothing. NHLBI requires consistently high readings at two or more separate appointments, and the US Preventive Services Task Force recommends confirming a high office number with home or 24-hour readings before treatment (US Preventive Services Task Force 2021, JAMA). Some people read high only in the clinic (white-coat hypertension), others only outside it (masked hypertension, which carries substantially higher risk) (Muntner 2019, Hypertension).

Here is the surprise: technique moves the number more than most supplements do. In a randomized crossover trial of 133 adults, resting the hand in the lap raised systolic readings 3.9 mmHg compared with an arm supported on a desk, and letting the arm hang raised them 6.5 mmHg (Liu 2024, JAMA Internal Medicine). Cuff size is worse. A standard cuff on an arm that needed an extra-large one overstated systolic pressure by 19.5 mmHg in a trial of 195 adults (Ishigami 2023, JAMA Internal Medicine).

The NHLBI routine is short. Use a validated upper-arm cuff sized to your arm (validatebp.org lists them), and skip exercise, coffee, and smoking for 30 minutes. Sit five minutes, feet flat, arm on a table at heart level, then average several days of readings. How often? The Task Force says every year from age 40 or at higher risk, and every three to five years for adults 18 to 39 with a normal prior reading and no risk factors (USPSTF).

Go deeper: the vitamin D blood test and its target range, another number worth asking about at the same checkup.

What do food and exercise actually do to blood pressure?

More than any supplement sold. The DASH eating pattern (Dietary Approaches to Stop Hypertension: vegetables, fruit, low-fat dairy, whole grains, less saturated fat) lowered blood pressure 5.5/3.0 mmHg in 459 adults over eight weeks, and 11.4/5.5 mmHg in the 133 who started high, with sodium and weight held constant (Appel 1997, New England Journal of Medicine). Evidence grade: Strong.

Cutting sodium adds on top, and fast. DASH plus about 1,150 mg of sodium a day beat a typical high-sodium American diet by 7.1 mmHg systolic in participants without high blood pressure and 11.5 mmHg in those with it (Sacks 2001, New England Journal of Medicine; Juraschek 2017). In a 2023 crossover trial of 213 adults aged 50 to 75, a week at roughly 500 mg a day left systolic pressure 8 mmHg below a high-sodium week, with or without blood pressure medication (Gupta 2023, JAMA). Grade: Strong.

Potassium pulls the other way. Across 22 randomized trials, more potassium lowered blood pressure 3.49/1.96 mmHg, an effect seen in people with high blood pressure but not in those without, and systolic pressure fell 7.16 mmHg when intake reached 3,500 to 4,700 mg a day (Aburto 2013, BMJ). In 600 Chinese villages, swapping table salt for a 75/25 blend of sodium and potassium chloride gave 20,995 adults with a past stroke, or aged 60 and older with high blood pressure, 14% fewer strokes and 12% fewer deaths over nearly five years (Neal 2021, New England Journal of Medicine). Grade: Strong for blood pressure, Moderate for hard outcomes.

Exercise rivals diet. A network meta-analysis of 270 randomized trials and 15,827 people found aerobic training lowered resting pressure 4.49/2.53 mmHg and resistance training 4.55/3.04. Isometric training, holding a contraction like a wall squat, did best at 8.24/4.00 (Edwards 2023, British Journal of Sports Medicine). The wall squat ranked first for systolic pressure, and it requires a wall. Grade: Strong.

Weight and alcohol finish the list. Each kilogram lost lowered pressure about 1.05/0.92 mmHg across 25 trials (Neter 2003, Hypertension). Cutting alcohol helped only above two drinks a day; for people at six or more, halving intake lowered pressure 5.50/3.97 mmHg (Roerecke 2017, Lancet Public Health). Both grade Strong. Lifestyle stops where genetics, age, and kidney function set a floor, and that floor is what medication exists for.

Go deeper: the magnesium monograph, for which foods actually supply magnesium and how far a typical diet falls short.

When do supplements make sense for heart health and blood pressure?

After the basics, for readings in the normal or elevated range, as a measured experiment rather than a treatment. The best-studied supplements move systolic pressure 2 to 5 mmHg in pooled trials; DASH with low sodium moved it 7 to 11. Medication users: see the next section first.

Magnesium's effect is small but steady: across 34 double-blind trials in 2,028 adults, a median 368 mg a day lowered pressure 2.00/1.78 mmHg, and 300 mg a day, or a month of use, was enough to see it (Zhang 2016, Hypertension). The FDA allows only a qualified claim and calls the evidence inconsistent (NIH ODS). Read the elemental line on the label; our buying guide compares six magnesium products by elemental dose and price per day.

Lactotripeptides are VPP and IPP, milk-protein fragments that block ACE (angiotensin-converting enzyme, the target of ACE-inhibitor drugs) in lab work. Across 28 trials they lowered pressure 1.66/0.76 mmHg (Qin 2013, Nutrition, Metabolism and Cardiovascular Diseases). Japanese trials found 5.63 mmHg systolic (Chanson-Rolle 2015, PLoS One); European ones, 1.28, shrinking with age (Cicero 2013, American Journal of Hypertension). The top dose is contested. At 14 mg a day, 135 Dutch adults saw nothing (Engberink 2007, Hypertension), while in a 2010 crossover trial of 70 adults, 15 mg of IPP lowered pressure 3.8/2.3 mmHg in those with stage 1 readings, not in those below (Boelsma 2010, Nutrition Journal).

Celery seed extract is earlier. Nine small trials, all in Asian populations, found significant drops but extreme variation between studies and signs of publication bias; seed-extract arms used 1.34 g a day, while lower-dose preparations of 200 to 1,000 mg showed no systolic benefit (Liu 2025, Frontiers in Nutrition). In a triple-blind crossover trial, 52 people on 1.34 g a day saw 24-hour systolic pressure fall from 141.2 to 130.0 mmHg in four weeks (Shayani Rad 2022, Phytotherapy Research). Grade: Preliminary.

Citrulline is an amino acid the kidneys convert to arginine, the raw material for nitric oxide, which relaxes blood vessels. Fifteen small trials of citrulline or watermelon, its richest food source, pooled to 4.02/2.54 mmHg in middle-aged and older adults (Luo 2025, Clinical Nutrition ESPEN). Trials have used 2 g (Vors 2021, Nutrients) to 6 g a day (Gonzales 2017, Experimental Physiology), and the 2 g trial, which paired citrulline with a polyphenol extract, found no overall effect.

CoQ10 (coenzyme Q10, sold as ubiquinone or ubiquinol) is the electron carrier mitochondria use to make energy. For blood pressure, the Cochrane review found no significant effect across two small trials (Ho 2016, Cochrane Database of Systematic Reviews). Its strongest evidence sits elsewhere. In Q-SYMBIO, 420 people with moderate to severe heart failure took 100 mg three times a day for two years; major cardiovascular events fell from 26% to 15% and deaths from 18% to 10% (Mortensen 2014, JACC: Heart Failure). Grade: Moderate, from one trial in a disease population.

Fish oil is two separate questions. For blood pressure, 2 to 3 g a day of EPA plus DHA, the two omega-3 fats in fish oil, did best, about 2.6/1.7 mmHg across 71 trials (Zhang 2022, Journal of the American Heart Association). For heart attacks and strokes, a prevention trial gave 25,871 US adults aged 50 and older 1 g a day for 5.3 years and found no drop in major events, though heart attacks alone, a secondary endpoint, fell 28% (Manson 2018, New England Journal of Medicine). Its vitamin D arm used 2,000 IU a day; how much vitamin D3 to take puts that dose in context.

In higher-risk patients the trials split. REDUCE-IT gave 8,179 statin-treated patients with high triglycerides 4 g a day of prescription purified EPA and cut events from 22.0% to 17.2% (Bhatt 2018, New England Journal of Medicine). STRENGTH gave 13,078 similar patients 4 g of an EPA plus DHA drug and stopped early with no benefit (Nicholls 2020, JAMA). REDUCE-IT's mineral-oil placebo may explain part of the gap (NIH ODS). Grade: Insufficient for over-the-counter fish oil preventing events in healthy people.

Skip beta-carotene and vitamin E, which the Task Force recommends against for heart protection; it found too little evidence to back a multivitamin either (US Preventive Services Task Force 2022, JAMA). Then run any experiment honestly: two weeks of home readings before you start, two more near the end of a two-to-three-month trial. No change in the average, no more money.

Go deeper: the lactotripeptide trials one by one, and the chemistry behind celery seed's 8.8% volatile-oil standard.

Which groups should be more careful?

People already taking blood pressure medication come first: add nothing sold for blood pressure without your prescriber, since effects stack and potassium in particular can interact with common drugs (next section). Food stays the safe lever, since the sodium effect held with or without medication (Gupta 2023); clear salt substitutes with your prescriber first.

Statin users, whose cholesterol drug also blocks the body's own CoQ10 production, do run lower: blood CoQ10 fell from 1.3 to 0.8 mcg/mL on simvastatin in one trial (Taylor 2014, Atherosclerosis). In the same trial, 600 mg a day did not ease muscle aches in confirmed cases. Two meta-analyses found no benefit (Banach 2014, Mayo Clinic Proceedings; Kennedy 2020, Atherosclerosis), and two found a modest one (Qu 2018, Journal of the American Heart Association; Kovacic 2025, Journal of Nutritional Science). Grade: Insufficient. CoQ10 beside a statin is low risk; quitting a statin on a supplement theory is not.

Adults over 60 face the highest odds, 71.6% (CDC). Cuff fit matters more as arms change, and the European lactotripeptide effect shrank with age (Cicero 2013). Black adults made up 57% of the DASH-Sodium trial (Juraschek 2017, Hypertension), and the sodium effect held across races (Sacks 2001).

Pregnancy is separate territory, and the one trial here run in pregnancy was discouraging: in 115 women with preeclampsia, citrulline did not prolong pregnancy and was linked to higher systolic pressure and liver enzymes at delivery (Winer 2024, American Journal of Clinical Nutrition). Skip blood pressure supplements while pregnant or nursing unless your obstetric team says otherwise.

Go deeper: the CoQ10 monograph, for ubiquinone versus ubiquinol and the statin evidence in detail.

What goes wrong with heart and blood pressure supplements?

Three things, mostly: a supplement contains a drug, two products stack the same effect, or a capsule replaces a treatment that was working. The first is real here. Rauwolfia (Indian snakeroot) is the source of reserpine, a prescription blood pressure drug that empties the stores nerve endings use for norepinephrine. At 0.5 mg a day or more it lowered systolic pressure about 7.9 mmHg against placebo in a Cochrane review of small trials (Shamon 2016, Cochrane Database of Systematic Reviews).

Unless a rauwolfia label states the reserpine content, you do not know your dose. Doctors now rarely prescribe it because of depression concerns. A 2022 review of 35 studies found 11 reporting depressive effects, 13 none, and 11 apparent antidepressant effects, with 30 at high risk of bias (Strawbridge 2022, Journal of Psychopharmacology). That is an unresolved signal, not a clean bill of health.

Ask a clinician before taking anything with rauwolfia or snakeroot if you take blood pressure medication, since the effects add, or an antidepressant or other psychiatric drug. The same goes for an MAOI (monoamine oxidase inhibitor, an older antidepressant class that should not be combined with reserpine without a prescriber). Skip it entirely if you are pregnant, nursing, or under 18, or have any history of depression. Stop and call if dizziness, fatigue, low mood, or stomach upset appears.

Minerals go wrong through the kidneys. Most potassium supplements stop at 99 mg per serving, but salt substitutes carry 440 to 2,800 mg per teaspoon, and people with kidney disease or on ACE inhibitors or potassium-sparing diuretics can develop hyperkalemia (too much blood potassium) at ordinary intakes (NIH ODS). Supplemental magnesium has an adult upper limit of 350 mg a day. Above it, diarrhea is common, and because the kidneys clear the excess, reduced kidney function changes the math (NIH ODS).

Fish oil's surprise risk is heart rhythm. Across seven outcome trials and 81,210 people, omega-3 supplements raised the risk of atrial fibrillation (an irregular, often rapid heart rhythm) by 25%, and by 49% at doses above 1 g a day (Gencer 2021, Circulation). REDUCE-IT logged more atrial fibrillation hospital stays, 3.1% versus 2.1%, and a trend toward more serious bleeding (Bhatt 2018). Clear doses above 1 g with a clinician if you have a rhythm problem or take a blood thinner.

CoQ10 appears on warfarin interaction lists from a few case reports, yet in a randomized crossover of 24 people on stable warfarin, 100 mg a day for four weeks changed neither INR (the clotting-time test) nor the dose (Engelsen 2003, Ugeskrift for Laeger). Check INR anyway. Lactotripeptides come from milk casein; celery is a common allergen, though the celery trials logged no more side effects than placebo (Liu 2025).

Go deeper: how reserpine works and what its trials found, the pharmacology behind these warnings.

Mt. Angel Vitamins products for heart and blood pressure support

Three of our products fit this topic, each with at least one ingredient at a studied dose and limits you should hear from us first. Prices and amounts were read from our store pages on October 14, 2026; per-day cost follows the label directions.

CoQ10 + Alpha Lipoic Acid 100 mg is one vegetarian capsule a day with 100 mg of CoQ10 plus alpha lipoic acid and lecithin; the product page does not list the alpha lipoic acid amount, so we make no claim for it. Sixty capsules cost $25.99, or $0.43 per day. It supports cellular energy production in heart muscle.* The 100 mg sits at the low end of the 100 to 600 mg a day used in the CoQ10 trials cited above.

YourHeart Nutrients is four capsules a day, two twice daily, holding 100 mg CoQ10, 210 mg magnesium (citrate and ascorbate), 380 mg L-citrulline malate, and 99 mg potassium, plus Terminalia arjuna bark extract, plant sterols, hawthorn berry, bromelain, and vitamin C at the amounts on the label. Fifteen servings cost $27.99, or $1.87 per day. It supports healthy circulation and cardiovascular function.*

The candid read: its CoQ10 sits at a studied dose, but its magnesium falls short of the 300 mg a day the trials identified, and its citrulline and potassium are far below the amounts tested alone. We make no dose claim for arjuna, hawthorn, or the sterols, which this page did not review. For magnesium at the trial dose, a standalone product is the direct route; see how a magnesium amino acid chelate compares with citrate and oxide.

Blood Pressure Ultra Support is labeled as two capsules twice daily, so a day is four capsules: 224 mg AmealPeptide (hydrolyzed milk casein supplying 15 mg of the lactotripeptides VPP and IPP), 700 mg citrulline, 454 mg celery seed extract containing 8.8% volatile oils, 40 mg rauwolfia extract, and 99 mg potassium. A 60-capsule bottle lasts 15 days at that rate and costs $31.99, or $2.13 per day. It supports healthy blood pressure already within the normal range.*

Where it fits: its 15 mg of lactotripeptides a day matches the 15 mg of IPP in the 2010 trial above, though a 14 mg trial found nothing. Where it does not: its celery seed extract is a third of the 1.34 g studied, and its citrulline falls short of the 2 to 6 g tested. It also contains rauwolfia, the source of the prescription drug reserpine, at an unstated reserpine dose. Read the safety section first; use it with blood pressure or psychiatric medication only if your clinician approves. Not for pregnancy, nursing, or anyone under 18; contains milk.

We make no fish oil or garlic product; for fish oil, pick any brand that publishes a certificate of analysis for each lot. All three of ours are made in our own cGMP facility in Mt. Angel, Oregon. Every batch is tested in our in-house lab for identity, potency, and purity, and the certificate of analysis for each lot is published on our lab-testing page.

Go deeper: how to read a supplement label and a certificate of analysis, so you can check any formula, ours included.

The bottom line

Measure correctly first: a validated upper-arm cuff in the right size, arm on a table, several days of readings. Above 120/80, start with what moves the number most: less sodium and more potassium from food, the DASH pattern, exercise that includes isometric work, weight loss if it applies, and no more than two drinks a day. Supplements come after and do less. Anyone on medication changes nothing without the prescriber.

Go deeper: which magnesium supplement to buy, ranked with prices per day, if magnesium is your first experiment.

Keep reading

• CoQ10 monograph: forms, doses, and every trial graded.
• AmealPeptide research review: the milk-peptide trials in detail.
• Rauwolfia and reserpine: the pharmacology behind the warnings.

Common Myths

"I feel fine, so my blood pressure is fine."

Feeling fine is exactly how high blood pressure usually feels. In the latest national survey, only 59.2% of American adults with high blood pressure knew they had it, and just 20.7% had it controlled (CDC NCHS Data Brief 511). Risk rises steadily from 115/75 upward, long before anything hurts (Lewington 2002, Lancet). The cuff is the symptom checker.

"Diet changes take months to show up."

A week is enough to see it. After seven days, adults aged 50 to 75 eating a low-sodium diet had systolic pressure 8 mmHg below those eating a high-sodium diet, and about three in four saw their pressure fall when they switched from high to low (Gupta 2023, JAMA). Most of the DASH diet's effect, 4.4 mmHg systolic, arrived in its first week (Juraschek 2017, Hypertension). Very little in nutrition pays back that quickly.

"Fish oil protects everyone's heart."

In a trial of 25,871 healthy adults, 1 g a day for five years did not reduce heart attacks, strokes, and cardiovascular deaths combined (Manson 2018, New England Journal of Medicine). The prescription EPA win in REDUCE-IT did not repeat in STRENGTH at the same 4 g dose (Nicholls 2020, JAMA). Meanwhile omega-3 supplements raised atrial fibrillation risk 25% across seven trials (Gencer 2021, Circulation). Fish oil is a modest blood pressure tool and a prescription question for high triglycerides, not a shield.

"CoQ10 fixes statin muscle pain."

Not reliably, according to a tightly controlled test. Among 120 people convinced statins hurt their muscles, only about a third got pain on the statin and not on placebo when they could not tell which was which, and 600 mg a day of CoQ10 did not relieve it (Taylor 2014, Atherosclerosis). The meta-analyses split two against two. Ask about a different statin or dose before blaming your CoQ10 level.

"A multivitamin covers my heart."

The US Preventive Services Task Force found too little evidence that multivitamins prevent cardiovascular disease, and it recommends against vitamin E and beta-carotene for that purpose (US Preventive Services Task Force 2022, JAMA). About half of American adults take a supplement anyway, and 31% take a multivitamin. Use one to fill a real dietary gap. Do not count on it for your arteries.

"A natural blood pressure supplement can replace my medication."

This myth costs the most, in money and in everything else. The largest pooled supplement effects on this page are 2 to 5 mmHg in trials lasting weeks, while in drug trials every 10 mmHg of systolic reduction cut major cardiovascular events 20% and stroke 27% (Ettehad 2015, Lancet). The one botanical here with a drug-sized effect, rauwolfia, gets it from reserpine, a prescription drug, and a label listing only the root extract does not tell you the reserpine dose (Shamon 2016, Cochrane Database of Systematic Reviews). Paying for capsules while a treatable number climbs is the expensive way to save money. Any supplement belongs beside treatment, with your prescriber's knowledge, never in place of it.

Frequently Asked Questions

What supplements are good for heart health?

The ones with real human data are modest. Magnesium lowered blood pressure about 2.0/1.8 mmHg across 34 trials (Zhang 2016), garlic preparations about 5.1/2.5 mmHg across 20 (Ried 2016), and fish oil at 2 to 3 g a day about 2.6/1.7 mmHg across 71 (Zhang 2022). None has been shown to cut major cardiovascular events in healthy people in a large trial; 1 g of fish oil a day did not in 25,871 adults (Manson 2018). The Task Force recommends against vitamin E and beta-carotene for this. Food, exercise, and an accurate home cuff do more than any capsule, and our [magnesium monograph](/ingredients/magnesium) covers its forms and doses.

Does CoQ10 help your heart?

For blood pressure, probably not: the Cochrane review found no significant effect (Ho 2016). For people with moderate to severe heart failure, one two-year trial of 420 patients taking 300 mg a day found fewer major cardiovascular events, 15% versus 26%, and fewer deaths (Mortensen 2014, Q-SYMBIO). Earlier trials were too small to test outcomes like these. CoQ10 is the electron carrier mitochondria use to make energy, and heart muscle uses a lot of it, but that does not mean healthy people run short. With a heart condition, it is a question for your cardiologist. The [CoQ10 monograph](/ingredients/coq10-coenzyme-q10) has the full evidence.

Should I take CoQ10 if I take a statin?

It is reasonable to ask your prescriber, but keep expectations low. Statins do lower blood CoQ10, from 1.3 to 0.8 mcg/mL on simvastatin in one trial, yet trials of CoQ10 for statin muscle aches conflict: two meta-analyses found no benefit (Banach 2014, Kennedy 2020) and two found a small one (Qu 2018, Kovacic 2025). In a trial that retested people under blinding, only about a third of those who blamed statins for muscle pain reproduced it, and 600 mg a day of CoQ10 did not help (Taylor 2014). Do not stop a statin on your own; ask about a dose or drug change first.

What is a normal blood pressure reading?

Below 120/80 mmHg. Elevated is 120 to 129 systolic with diastolic under 80. Stage 1 high blood pressure is 130 to 139 systolic or 80 to 89 diastolic, stage 2 is 140 or higher or 90 or higher, and anything above 180 or 120 needs a clinician immediately. These are the 2017 ACC/AHA categories (Whelton 2017), and NHLBI lists the same cutoffs today. One reading diagnoses nothing: diagnosis needs consistently high readings on separate occasions, ideally confirmed at home with the right cuff size and your arm supported at heart level.

Does magnesium help blood pressure?

A little. Across 34 double-blind trials in 2,028 adults, a median 368 mg a day for about three months lowered blood pressure 2.00/1.78 mmHg, and 300 mg a day was enough to see the effect (Zhang 2016, Hypertension). The FDA permits only a qualified claim and calls the evidence inconsistent. The upper limit for supplemental magnesium is 350 mg a day, too much causes diarrhea, and people with kidney disease should ask first. Read the elemental amount on the label, not the compound weight. Our [magnesium monograph](/ingredients/magnesium) compares forms and doses.

Can supplements help blood pressure?

Some move it a few points; none replace treatment. Pooled trials show roughly 2 mmHg for magnesium, 1 to 6 mmHg for milk lactotripeptides depending on population, 5 mmHg for garlic, 2.6 mmHg for fish oil at 2 to 3 g a day, and nothing significant for CoQ10. One week of low sodium moved systolic pressure 8 mmHg (Gupta 2023). Every 10 mmHg of systolic reduction in drug trials cut major cardiovascular events 20% (Ettehad 2015), so small numbers matter but do not substitute. If you take blood pressure medication, add nothing without your prescriber. Our [lactotripeptide review](/research/amealpeptide-hydrolyzed-casein-blood-pressure) covers the milk-peptide trials.

What foods help keep blood pressure healthy?

Vegetables, fruit, low-fat dairy, beans, nuts, and whole grains, eaten in the DASH pattern with less sodium. DASH lowered blood pressure 5.5/3.0 mmHg in eight weeks, and 11.4/5.5 mmHg in people who started high (Appel 1997). In a second trial, DASH with low sodium beat a typical high-sodium diet by 7.1 mmHg systolic in people without high blood pressure and 11.5 in those with it (Sacks 2001). More potassium helps most in people with high readings, and intakes of 3,500 to 4,700 mg a day lowered systolic pressure about 7 mmHg across trials (Aburto 2013). Most American sodium comes from processed and restaurant food (CDC), so labels and menus are where the cuts happen.

Is celery seed extract good for blood pressure?

Possibly, but the evidence is early. Nine small randomized trials, all in Asian populations, found significant drops with large variation between studies and signs of publication bias; seed extracts at 1.34 g a day did best, and lower-dose preparations of 200 to 1,000 mg a day showed no systolic benefit (Liu 2025). In one four-week crossover trial of 52 people on 1.34 g a day, 24-hour systolic pressure fell from 141.2 to 130.0 mmHg (Shayani Rad 2022). Grade: Preliminary. Avoid it with a celery allergy. Our [celery seed extract review](/research/celery-seed-extract-blood-pressure) covers the chemistry behind the 8.8% standard.

Is fish oil good for your heart?

For most healthy people, a large trial says no: 1 g a day for 5.3 years in 25,871 adults did not reduce major cardiovascular events, though heart attacks alone, a secondary endpoint, fell 28% (Manson 2018). Prescription purified EPA at 4 g a day cut events 25% in statin-treated patients with high triglycerides (REDUCE-IT, Bhatt 2018), but a 4 g EPA plus DHA drug did nothing in a similar trial (STRENGTH, Nicholls 2020). Omega-3 supplements also raised atrial fibrillation risk 25% overall and 49% above 1 g a day (Gencer 2021). For blood pressure, 2 to 3 g a day lowers it about 2.6 mmHg (Zhang 2022).

How often should I check my blood pressure?

At least once a year from age 40 or if you are at higher risk, and every three to five years from 18 to 39 if your last reading was normal and you have no risk factors (USPSTF 2021). NHLBI advises a yearly check for everyone 3 and older. If a reading is high, confirm it outside the office with a home cuff or a 24-hour monitor before treatment starts. When you change your diet or start a supplement, log home readings for a couple of weeks before and after; the average tells you whether it worked. Use a validated upper-arm cuff (validatebp.org lists them).