You are already on the medication. A doctor looked at your blood pressure, your kidneys, maybe your heart, and put you on lisinopril, ramipril, enalapril, losartan, or valsartan. Good. What you want to know now is narrower: of all the supplements people talk about, which ones are actually safe to take alongside the drug, which ones are a genuinely bad idea, and what you should run past your pharmacist before you start. That is the whole job of this page. Nothing here is a reason to change your dose.
Why potassium, not depletion, is the headline with these drugs
Most "supplements for [drug]" articles open with a depletion story. With ACE inhibitors and ARBs the more important fact runs the other way.
These medicines work by quieting the renin-angiotensin system. One result is that your kidneys hold on to more potassium instead of dumping it. That is usually fine and often the point. But it means anything that adds potassium on top – a supplement, a salt substitute, sometimes another drug – can stack with the medication and push your blood potassium too high. High potassium is called hyperkalemia, and at the severe end it can trigger dangerous heart rhythms. The FDA prescribing information for lisinopril names potassium supplements and potassium-containing salt substitutes as combinations to avoid or monitor closely, and the same warning runs across the class.
So this page is built around one idea. There is a small nutrient gap worth filling, and there is a hard line you do not cross. Get both right and you have done the work.
What ACE inhibitors and ARBs deplete (and what they don't)
Here is the depletion picture, graded honestly.
Zinc – observational, real but limited. ACE inhibitors and ARBs are associated with more zinc lost in the urine and somewhat lower zinc in blood or white cells after about six months or more of use. The best summary is a systematic review, Braun and Rosenfeldt's pharmaco-nutrient review of zinc and antihypertensive therapy, which found increased urinary zinc with captopril, enalapril, losartan, and the losartan-plus-thiazide combination, and lower zinc levels with several agents. The authors are careful: the studies were small, did not always control for how much zinc people ate, and the result was not consistent across every trial. So treat this as a plausible, well-described signal, not a certainty. It is not on the level of, say, metformin and B12.
Potassium – the opposite of a depletion. Worth saying again because so many people get it backwards: these drugs raise potassium. You do not need to "replace" it, and adding it is the main thing to watch.
That is the short list. There is no strong evidence that ACE inhibitors or ARBs meaningfully drain magnesium, the B vitamins, or vitamin D. If a product promises to fix some long roster of nutrients your blood-pressure pill supposedly stole, be skeptical.
The supplements worth adding, and how to take them
These three are reasonable to add alongside an ACE inhibitor or ARB. None of them raises potassium, and none replaces the drug. Confirm with your pharmacist first, especially if your kidney function is reduced.
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Zinc with copper is the one that lines up with what these drugs actually do. A modest dose, paired with a little copper, refills the slow loss the review above describes. The copper matters: high-dose zinc on its own can quietly cause a copper deficiency over time, which is why the NIH Office of Dietary Supplements zinc fact sheet sets an upper limit of 40 mg a day for adults and flags the copper interaction. You want a low, balanced dose, not a megadose. Take zinc away from coffee, calcium, and iron, which blunt its absorption; a couple of hours apart is enough.
Omega-3 fish oil is a reasonable add for general heart health if you do not eat much oily fish. At ordinary supplement doses it is INR-neutral and does not touch your potassium. One caution if you also take a blood thinner: higher doses of omega-3 add to bleeding risk, so clear the dose with whoever manages your anticoagulation.
A methylated B-complex with methylfolate and methylcobalamin is a fair general add for many adults, and it does not interact with ACE inhibitors or ARBs. The drug does not deplete B vitamins; this is just ordinary nutritional insurance. Keep the dose modest.
Here is the plan in one place.
| Supplement | What it helps with | How to take it (timing/spacing from your dose) | Caution |
|---|---|---|---|
| Zinc with copper (low, balanced dose) | Refills the slow zinc loss linked to ACE inhibitors and ARBs | No spacing from your BP pill needed; take zinc 2 hours away from coffee, calcium, and iron, which reduce its absorption | Keep it at or below 40 mg zinc a day; always pair with a little copper to avoid copper deficiency |
| Omega-3 fish oil (EPA/DHA) | General cardiovascular support if you eat little oily fish | With a meal; no spacing from the BP pill needed | Higher doses add to bleeding risk – clear the dose if you also take a blood thinner |
| Methylated B-complex | General nutritional insurance (not a drug depletion) | With breakfast; no interaction with ACE/ARB | Keep the dose modest; no need to megadose folate or B12 |
One practical tool. You can log your blood-pressure medication and every supplement in one place using StackMyMed (our own free app), so overlaps – a hidden potassium load in a greens powder, say, or an additive blood-pressure effect – get flagged for you to ASK your pharmacist about. It does not diagnose anything or give medical advice; it just surfaces what is worth a question. If you would rather not use an app, the low-tech version works just as well: write your full list on paper, drug doses and supplements together, and show it to your pharmacist at the counter.
What to avoid or space apart
This is the section that matters most. Read it slowly.
Potassium supplements – avoid unless your prescriber dosed them. Potassium chloride, potassium citrate, potassium gluconate: because your ACE inhibitor or ARB already makes your kidneys hold potassium, adding more can tip you into hyperkalemia. This is the labeled interaction. Do not self-start potassium.
Potassium-based salt substitutes – avoid. No Salt, Morton Salt Substitute, LoSalt, and similar "lite" salts are potassium chloride wearing a salt-shaker disguise. A single teaspoon can add hundreds of milligrams of potassium, sometimes well over a thousand. Same mechanism, same risk, and the danger climbs if you have diabetes or reduced kidney function.
Potassium-loaded greens and electrolyte powders – check the label. Plenty of "greens" blends, electrolyte mixes, and coconut-water concentrates are quietly potassium-rich. Read the panel and clear them with your pharmacist before you make one a daily habit.
CoQ10 – space and monitor, do not just add. Coenzyme Q10 can lower systolic blood pressure on its own. Pooled trial data in a dose-response meta-analysis of CoQ10 and blood pressure put the drop in the region of 3 to 5 mmHg. On top of an ACE inhibitor or ARB that can mean too much blood-pressure lowering – dizziness, lightheadedness, even fainting. If you and your prescriber decide to use it, track your home readings and recheck potassium.
High-dose magnesium – usually fine, but go gently. Magnesium and these drugs are broadly compatible and even work in the same BP-friendly direction. The catch is that magnesium mildly adds to blood-pressure lowering and is cleared by the kidneys, so in chronic kidney disease it can build up. Start low, watch your readings, and skip high doses if your kidney function is reduced.
Nitric-oxide boosters – space and monitor. L-arginine, L-citrulline, and high-dose beetroot or nitrate products all nudge blood pressure down. Combined with the drug they can over-shoot. Use them only with your prescriber and a home blood-pressure cuff.
Licorice root – avoid the real thing. Whole licorice and glycyrrhizin extracts raise blood pressure and throw off potassium by blocking an enzyme in the kidney (a clinical review of liquorice-induced secondary hypertension lays out the mechanism). That works directly against your medication and muddies your electrolytes. Deglycyrrhizinated licorice (DGL), the kind used for the stomach, has the glycyrrhizin removed and is the lower-risk form, but still mention it to your pharmacist.
See a doctor or pharmacist promptly if you notice muscle weakness, numbness or tingling, an irregular, slow, or pounding heartbeat, nausea, or unusual fatigue. Those can signal hyperkalemia – high potassium – and need same-day attention; treat it as urgent if it is severe. Separately, any swelling of the face, lips, tongue, or throat, or trouble breathing, can be angioedema and is an emergency. So is persistent dizziness or fainting from your blood pressure dropping too far.
Can you cover it with food instead?
Often, yes, and food is the better starting point.
For the zinc gap, eat zinc-rich foods before you reach for a capsule: oysters are far and away the richest, then beef, poultry, pumpkin seeds, and legumes. For the cardiovascular side, oily fish twice a week (salmon, sardines, mackerel) does much of what a fish-oil capsule does.
Potassium is the tricky one. You do not need to fear potassium from whole foods – bananas, potatoes, beans – and you should not crash your intake either. The rule is steadiness: keep your dietary potassium roughly consistent from week to week rather than loading up, and never use a potassium salt substitute as a "healthy" swap. If your prescriber has ever mentioned watching your potassium, that advice covers food too, so ask them where your line is.
FAQ
Can I take a multivitamin with my ACE inhibitor or ARB? Usually yes – a standard multivitamin does not interact. The thing to check is the potassium content, which is normally tiny in a multivitamin, and to avoid any “blood pressure” or “electrolyte” blend that loads potassium. Read the label or have your pharmacist glance at it.
Is zinc actually worth adding, or is that overhyped? It is a modest, reasonable add, not a must. The evidence for slow zinc loss on these drugs is real but limited and observational. A low, copper-balanced dose is low-risk; just do not megadose, and get zinc from food where you can.
Why can’t I use a salt substitute? My doctor told me to cut sodium. Cutting sodium is good advice. The problem is that most salt substitutes replace sodium with potassium, and your medication already raises potassium. Ask your pharmacist for a low-sodium approach that does not rely on potassium chloride.
Is CoQ10 safe with my blood-pressure medication? It is not dangerous the way extra potassium is, but it can add to your blood-pressure lowering and leave you dizzy. If you want to try it, do it with your prescriber and keep an eye on home readings.
Can a supplement let me lower or stop my medication? No. No supplement is a “natural alternative” to an ACE inhibitor or ARB, and none is a reason to reduce or stop the drug. These medicines control blood pressure and protect your kidneys and heart. Any dose change is your prescriber’s call.
What should I bring to my pharmacist? Your full list – the prescription with its dose, plus every supplement, vitamin, and “wellness” powder, including the ones you take only sometimes. A pharmacist can spot a hidden potassium load or an additive blood-pressure effect in about a minute.
The bottom line
If you are on lisinopril, ramipril, enalapril, losartan, or valsartan, the safe nutrient to consider adding is a low, copper-balanced dose of zinc, because these drugs are linked to slow zinc loss. The non-negotiable rule is potassium: skip potassium supplements and potassium-based salt substitutes, and read greens and electrolyte powders for hidden potassium, because your medication already raises it and the combination can be dangerous. Watch CoQ10, high-dose magnesium, and nitric-oxide boosters for too much blood-pressure lowering, and steer clear of glycyrrhizin licorice. Then take your whole list to your pharmacist before you add anything. For more on the supplements named here, see our guides to the best zinc supplements and the best omega-3 fish oil supplements, work out a sensible amount with our zinc dose calculator, and if you are weighing your overall routine, our roundup of supplements for high blood pressure covers the wider picture.
This article is educational and is not medical advice, a diagnosis, or a prescription change. Talk to your own doctor or pharmacist before starting, stopping, or changing any supplement or medication.
Reviewed by the UsefulVitamins Editorial Team.
