Multiforce Alkaline Powder is a mineral supplement dissolved in water, marketed for “alkalising” the body — for acid indigestion, fatigue, muscle recovery and general wellbeing. The minerals it supplies are real and can be useful. The theory behind it, that your body needs alkalising, is not.
What is Multiforce Alkaline?
Multiforce Alkaline is a health supplement, not a registered medicine, and it does not appear on the South African Medicine Price Registry — which lists SAHPRA-approved medicines. Supplements are regulated far more lightly, and their claims do not have to be proven before sale.
Powders of this type are built on alkaline mineral salts — typically the citrate, carbonate or bicarbonate forms of potassium, magnesium, calcium, sodium and zinc, sometimes with trace elements. Check the label on your own tub, since formulations differ and change.
The minerals are genuine. Magnesium, potassium and zinc are real nutrients, many people do not get enough of them, and citrate forms are well absorbed.
The alkalising theory is where it goes wrong, and it drives most of the marketing. Your blood pH is held between about 7.35 and 7.45 by the lungs and kidneys, and nothing you eat or drink changes it. If it did shift meaningfully you would be critically ill. Urine pH does change with diet within hours — which is what the “test your pH” strips show. Alkaline urine tells you the kidneys are doing their job, not the state of your tissues.
So the honest summary is: the “alkalising” claim is not supported, but the minerals may still be worth having. Whether the powder is worth its price depends on how much of each mineral it actually supplies, compared with a plain magnesium or potassium supplement — which is usually considerably cheaper.
If you search the medicine register for “alkaline”, you will get haemodialysis bicarbonate concentrate — an industrial-scale solution used in dialysis machines. That is a letters-match, not this product. Disregard it.
What is Multiforce Alkaline commonly used for?
Marketed and used for:
- Acid indigestion and heartburn. This one has a real mechanism — the bicarbonate and carbonate salts do neutralise stomach acid, exactly as an antacid does.
- Fatigue and low energy, attributed to “acidity”. If low magnesium or potassium is genuinely contributing, correcting it helps — but not for that reason.
- Muscle cramps and post-exercise recovery, where magnesium and potassium are plausibly useful.
- Reducing urinary acidity, and supporting kidney health.
- Reducing recurrent kidney stones. This is the one strongly evidence-based use of alkalising salts — potassium citrate genuinely reduces recurrence of calcium and uric acid stones. If this is your reason, get it prescribed properly at the right dose.
- Gout, where alkalinising urine helps uric acid excretion — real, but better managed medically.
- General wellbeing and “detox”.
What it will not do, despite widespread claims: change your blood pH, prevent cancer, cure chronic disease, or “detoxify” you. The liver and kidneys handle that continuously and do not need a supplement to do it.
Who commonly looks for Multiforce Alkaline and why
People with recurring heartburn, who have found the powder settles it. It does — as an antacid. Cheaper antacids do the same, and persistent heartburn deserves a proper look.
People who are tired and looking for a cause. Fatigue has many causes — anaemia, thyroid problems, sleep apnoea, depression, diabetes, genuine mineral deficiency. A blood test finds which. A supplement guesses.
Athletes and gym-goers, for cramps and recovery. Magnesium and potassium are reasonable here; the alkalising framing is not what makes them work.
People with recurrent kidney stones, who are right that alkalinising urine helps, but would be better served by prescribed potassium citrate at a monitored dose.
People persuaded by the alkaline diet. Worth noting: the diet it recommends — more vegetables and fruit, less processed food, red meat and alcohol — is genuinely healthy. It works for reasons that have nothing to do with pH.
What to check on the label before taking Multiforce Alkaline
- The actual amount of each mineral, in milligrams of elemental magnesium, potassium, calcium and zinc. This is the figure that matters and the one that lets you compare price against a plain supplement.
- The sodium content. Alkalising powders can carry a substantial sodium load, which matters with high blood pressure, heart failure or a low-sodium diet.
- The potassium content. This is the most important safety figure on the label — see below.
- The form of the salts — citrate and bicarbonate are well absorbed; oxide is not.
- Claims. Anything promising to alkalise your blood, detoxify you or prevent disease is not accurate.
Safety, interactions and when to seek professional advice
The potassium is the real safety issue, and it is the one most people never think about. Potassium supplements are safe for healthy kidneys, which excrete the excess easily. When the kidneys are impaired, or when certain medicines are involved, potassium can rise to dangerous levels and cause serious heart rhythm disturbances.
Do not take an alkalising potassium supplement without medical advice if you:
- Have kidney disease or reduced kidney function.
- Take a potassium-sparing diuretic — spironolactone, amiloride, eplerenone.
- Take an ACE inhibitor (enalapril, perindopril, lisinopril) or an ARB (losartan, telmisartan, valsartan).
- Take potassium supplements already, or co-trimoxazole, or trimethoprim.
- Have Addison’s disease or another adrenal condition.
Also speak to a doctor or pharmacist first if you:
- Have high blood pressure or heart failure — because of the sodium.
- Have heart rhythm problems, or take digoxin.
- Have kidney stones — get the right salt prescribed rather than guessing.
- Take thyroid medicine, bisphosphonates, iron, or antibiotics such as doxycycline or ciprofloxacin. Calcium, magnesium and zinc bind all of these. Separate them by at least two hours.
- Take lithium, or are pregnant or breastfeeding.
Common effects are mild: bloating, wind, nausea, and loose stools — magnesium in particular is a laxative in quantity, which is a dose-limiting factor for many people.
Seek prompt advice for: muscle weakness, palpitations, an irregular or slow heartbeat, marked tiredness, numbness or tingling — all possible signs of high potassium. Also for swollen ankles, breathlessness, or a rise in blood pressure.
Get emergency help for chest pain, fainting, severe palpitations, or swelling of the face, lips or tongue with difficulty breathing.
See a doctor rather than self-treating if: you have persistent heartburn, particularly with difficulty swallowing, weight loss, vomiting or black stools, or if it starts over the age of 45; you have ongoing fatigue, which deserves a blood test rather than a supplement; you get repeated kidney stones; you have muscle cramps that are frequent or severe; or you are using the powder daily, indefinitely, without knowing whether it is helping.
Related supplement guides
Frequently asked questions
What is Multiforce Alkaline powder used for? It is marketed for acid indigestion, fatigue, cramps, recovery and general wellbeing. It supplies alkaline mineral salts — typically potassium, magnesium, calcium and sodium.
Does it alkalise your body? No. Blood pH is held between about 7.35 and 7.45 by the lungs and kidneys, and diet does not change it. Urine pH does change, but that shows the kidneys working, not the state of your tissues.
So is it useless? Not necessarily. The minerals are real and may be worth having, and the bicarbonate salts do neutralise stomach acid like an antacid. It is the alkalising theory that is unsupported, not the ingredients.
Does it help heartburn? Yes, by neutralising stomach acid. A plain antacid does the same more cheaply, and persistent heartburn should be assessed.
Does it help kidney stones? Alkalinising salts genuinely do reduce recurrence of some stones — but this should be prescribed and monitored, using potassium citrate at the right dose.
Can anyone take it? No. The potassium content makes it unsafe without advice if you have kidney disease or take an ACE inhibitor, ARB or potassium-sparing diuretic — potassium can rise dangerously.
Can I take it with my other medicines? Separate it by at least two hours from thyroid medicine, iron, bisphosphonates and some antibiotics — the minerals bind them.
Why does the medicine register show dialysis solution when I search “alkaline”? Because the search matches product names containing those letters. That is haemodialysis bicarbonate concentrate, nothing to do with this supplement.