Before you read on — a word about potassium and prescriptions
Cream of tartar is a concentrated source of potassium. That is the point of it, and for most people it is unremarkable. But potassium is one of the few minerals where more is not automatically better, and a handful of common prescriptions change how your body holds on to it.
Talk to your doctor or pharmacist before adding Tarsul if you take a potassium-sparing diuretic (spironolactone, triamterene, amiloride), an ACE inhibitor (lisinopril, enalapril, ramipril), an ARB (losartan, valsartan, irbesartan), a potassium supplement or salt substitute, or regular NSAIDs — and if you have reduced kidney function or have been told to watch your potassium, ask first. It is a five-minute conversation and worth having.
And please do not stop, reduce, or replace a prescribed medication on your own. Nothing on this page is a reason to change what your doctor put you on. If you want to discuss it, discuss it with them. Fuller detail on serving sizes and precautions is on our dosage and precautions page.
Hypertension and Blood Pressure Wellness Information
This page provides general educational information. It is not medical advice, and it does not provide a diagnosis or a personal course of care.
Blood pressure is a measure of how hard blood pushes against artery walls, and it’s influenced by a mix of factors including sodium and potassium balance, blood vessel flexibility, kidney function, stress, and genetics. Hypertension — consistently elevated blood pressure — is often called a “silent” condition because it usually has no noticeable symptoms until it’s caused damage elsewhere, which is exactly why regular monitoring matters more than waiting to feel something is wrong.
When professional advice matters
See a doctor for blood pressure readings that are consistently elevated, or for any reading that’s severely high (generally considered a hypertensive crisis), especially if accompanied by headache, vision changes, chest pain, or shortness of breath. Blood pressure medication should never be started, stopped, or adjusted without medical guidance.
Everyday wellness questions
A home blood pressure log — taken at consistent times of day, ideally seated and rested — gives a clinician far more useful information than a single office reading, which can be skewed by stress (“white coat” effect). Sodium intake, activity level, sleep quality, and stress are also worth reviewing.
Explore blood pressure wellness topics
Here’s what we’ve written on blood pressure and related topics:
- Natural supplement approaches people research for hypertension
- Alternatives people research alongside blood pressure medication
- What people look into for more immediate blood pressure concerns
- Common prescription categories — lisinopril, amlodipine, and beta blockers — and what people research alongside them
- General approaches to lowering blood pressure without medication
- The gut-health connection to blood pressure, a newer area of research interest
- Hypertension and anxiety together, since the two often compound each other
- Stage 1 versus Stage 2 hypertension, and what that classification means
- What to actually compare when evaluating blood pressure supplements
About Tarsul
Tarsul is a dietary supplement containing cream of tartar and MSM sulfur. It is not a substitute for individualized medical care or prescribed medicine. Follow the current product label for ingredients, directions, and warnings.
Can Supplementation for Hypertension Help Lower Blood Pressure Safely? — a longer read covering what to look for, how the ingredients work, and when to see a doctor.
Common questions
Because it typically produces no noticeable symptoms even at levels that are damaging blood vessels and organs over time, which is why routine monitoring matters even for people who feel completely fine.
Potassium helps the body balance out sodium and eases tension in blood vessel walls, and it’s a commonly cited factor in blood pressure management, though it works alongside — not as a replacement for — other prescribed treatment.
Not automatically — certain supplements and minerals can interact with blood pressure medications in meaningful ways. Always check with a doctor or pharmacist before adding anything new if you’re currently on prescribed treatment.
For general product questions, contact Tarsul. For product directions and safety information, review the Tarsul Product Directions and Safety Information page, or see current product options.
Tarsul contains just two things. Cream of tartar is a concentrated potassium source — how much potassium, and who should check with a doctor first, is covered there. MSM sulfur covers what the human research does and does not show, plus dosage and side effects.
About this page — last reviewed September 2026
Published by Tarsul, a family-run dietary supplement company operating from San Diego, California since 2010. Written and reviewed in-house by Russ Guillemot, founder, drawing on fifteen years of direct correspondence with customers and wholesale accounts. We are not physicians and nothing here is a diagnosis or a course of treatment.
Where we reference published research we name the authors and the journal so you can look it up yourself. Where something is a common observation rather than a finding, we say so plainly. If a claim cannot be sourced, we leave it out.
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These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.