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Products that match the form and dose used in the studies. Umbral earns a commission on some purchases; the order never changes because of it.

Strong

0.3 g/kg body mass single dose (0.2 g/kg is the minimum effective); 0.4–0.5 g/kg adds side effects without adding benefit. Serial loading: 0.4–0.5 g/kg/day split into 0.1–0.2 g/kg portions across 3–7 days.

Ratings, prices and photos were read from Amazon on Sep 18, 2026. Amazon prices change; the current one is on the product page.

As an Amazon Associate, Umbral earns from qualifying purchases. Product data is provided by Amazon and may change; ratings and prices shown are Amazon’s, not Umbral’s. Recommendations are based on the evidence grade and the form used in trials, never on commission.

Nutricost Sodium Bicarbonate 2,500 mg, 120 Capsules

4.7(317)

$9.99

Capsules take the guesswork out of 0.3 g per kilo of body weight. Take it with a carbohydrate meal and 2–3 hours before the session, or the GI distress will cost you more than the bicarbonate gains.

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Amazon price on Sep 18, 2026.

Sodium Bicarbonate 650 mg Tablets

4.5(462)

$29.90

Pharmacy-grade tablets at a fixed 650 mg, which makes the arithmetic simple: a 70 kg athlete needs roughly 32 of them for a full 0.3 g/kg dose.

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Amazon price on Sep 18, 2026.

Sodium Bicarbonate 650 mg, Delayed Release

4.7(878)

$14.90

Delayed release moves the dissolution past the stomach, which is the whole reason the hydrogel and enteric versions exist. The best-rated option here if plain bicarbonate has wrecked your gut before.

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Amazon price on Sep 18, 2026.

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What to look for

✓Food-grade sodium bicarbonate powder, or enteric-coated / hydrogel-delivery capsules (e.g. Maurten Bicarb) to cut GI distress
✓0.3 g/kg body mass single dose (0.2 g/kg is the minimum effective); 0.4–0.5 g/kg adds side effects without adding benefit. Serial loading: 0.4–0.5 g/kg/day split into 0.1–0.2 g/kg portions across 3–7 days.
✓Third-party tested (USP, NSF, Informed Sport)

What to avoid

✕Proprietary blends that hide the dose per ingredient
✕Unstandardised extracts with no active-compound percentage

Safety notes

· GI distress — bloating, nausea, vomiting, abdominal pain and diarrhoea; the dose-limiting problem and the reason it is trialled in training first
· High sodium load: 0.3 g/kg in a 70 kg person is ~5.7 g of sodium bicarbonate (~1.6 g sodium) — inappropriate in hypertension, heart failure or sodium-restricted diets
· Contraindicated in pregnancy and in significant renal impairment; metabolic alkalosis is possible with repeated high doses

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As an Amazon Associate, Umbral earns from qualifying purchases. Product data comes from Amazon and may change; ratings and prices are Amazon's, not Umbral's. Suggestions are based on the science and the form used in studies, never on commission.

Umbral is a wellness product, not a medical device. It does not diagnose, treat, cure or prevent any disease. Supplement information is educational; talk to a clinician before starting anything, especially if you are pregnant, under 18, managing a condition or taking medication.

These statements have not been evaluated by the Food and Drug Administration.