Read the product reference below ↓Product information card · Not packaging. Open the dated label source and check the current pack.
Best Naturals
International · U.S. label
400 Capsule(s) · U.S. label record
United States label record; current availability in any country is unconfirmed.
Browse International products ↗L-Leucine 1600 mg per 4 Capsule(s). U.S. label entered 2022-06-16; source retrieved 2026-11-02. Current formula and stock unconfirmed.
THE PROOF & PRICE STANDARDSource-linked profile · Read what we checkInternational product reference
Research profile for a U.S.-market label. No current retailer offer, price or worldwide availability has been verified.
Read the complete recorded label ↓Check the source country, currency, exact formula and delivery destination before comparing offers. Product inclusion does not confirm local stock.
As an Amazon Associate I earn from qualifying purchases. We may earn a commission through paid links.
A dated U.S. label reference. No NIH approval, laboratory testing or current retail offer is implied.
NIH Dietary Supplement Label Database record 270350. Entered 2022-06-16; retrieved 2026-11-02. This is a U.S. label reference, not confirmation of the current formula, stock or availability in another country. Database inclusion is not NIH approval or independent testing.
Recorded serving: 4 Capsule(s). Servings per container: 100. Amounts below retain their own serving basis; they are not personal dose instructions. Indented rows are components and should not be added again to their parent total.
| Ingredient / nutrient | Amount | Per |
|---|---|---|
| L-Leucine | 1600 mg | 4 Capsule(s) |
| L-Isoleucine | 800 mg | 4 Capsule(s) |
| L-Valine | 800 mg | 4 Capsule(s) |
Capsule (Bovine Gelatin); Silicon Dioxide; Magnesium Stearate
Open the original NIH DSLD label record ↗. Data: NIH Office of Dietary Supplements, DSLD, CC0 1.0. Read the current packaging before use.
Read about the ingredients, possible benefits, evidence and practical cautions for this product.
Compare each declared amount with its own serving basis. Read the full recorded precautions below and verify the current pack before use. No personal dose or suitability is inferred.
Ingredient evidence 1 ↗Ingredient evidence 2 ↗Ingredient evidence is not a clinical test of this exact product.
The recorded formula includes Bovine. It is not a vegan formula; other ingredients and recorded allergen cautions remain part of this profile. No certification is inferred.
A dietary label does not establish allergy safety. Check the full ingredient and allergen panel.
Reviewed 2026-11-02. Label-based profile; this is not independent laboratory or batch testing.
90 Tablet(s) · U.S. label record
Read label profileU.S. label record · availability unconfirmed
Details & ingredients
12.38 Ounce(s) / 351 Gram(s) · U.S. label record
Read label profileU.S. label record · availability unconfirmed
Details & ingredients
250 Vegetarian Capsule(s) · U.S. label record
Read label profileU.S. label record · availability unconfirmed
Details & ingredientsProduct strengths describe the label, not personal dosing advice. If you use medicines, have a medical condition, are pregnant or are choosing for a child, ask a qualified clinician about suitability. Prices, availability, import charges and delivery are confirmed by the retailer. Photos may show market-specific packaging. Text covers identify editorial profiles and do not depict packaging.