Nutricost BCAA Powder 2:1:1 Review

Same brand, same 2:1:1 ratio, very different dose and effort. The capsules print 500 mg of leucine per two-capsule serving, so you would swallow many to match one scoop of the powder, which prints about 3,000 mg of leucine in a single 9 g scoop. The powder is flavored and sweetened with sucralose and acesulfame potassium; the capsules sidestep taste entirely. For a daily intra-workout dose the powder is the practical one, and the capsules are for travel.

Xtend and Primaforce both print 7 g of BCAAs per serving (about 3.5 g of leucine) and add 2.5 g of glutamine and electrolytes. Nutricost prints 6 g (about 3 g of leucine) with no added aminos or electrolytes, but costs about $0.42 a serving against $0.83 for Xtend and $0.77 for Primaforce on our list. Primaforce and Nutricost both print each of the three aminos as "approx."; Xtend prints exact amounts. If you want extras in the scoop, pick Xtend or Primaforce; if you want a flavored BCAA at the lowest price, this is it.

We could not confirm it. The pack says "Third Party Tested" with a dagger and names no lab, no certifier and no certificate. We searched NSF Certified for Sport's certified-product listing for "nutricost" on Oct 18, 2026 and it returned no results, and Nutricost does not appear in the Informed Sport certified-brands list. Nutricost's product page says its products are tested by an independent, accredited lab but names none and links no batch certificate of analysis that we could find. If you are tested, choose Thorne Amino Complex, which is in NSF's Certified for Sport database.

Close, but not exactly. The Amazon listing calls it a zero-calorie source of aminos, while the panel prints 5 calories and 1 g of total carbohydrate per scoop. That is trivial for most people, but we use the panel number.

Mostly the drink. Six grams of BCAAs at 2:1:1 gives about 3 g of leucine, which is above the roughly 2.5 g that switched on muscle protein synthesis in the trial we rely on; BCAAs alone raised it about 22% over placebo (Jackman 2017, PMID 28638350). But BCAAs are only three of the nine essential amino acids, and a major review called the claim that they build muscle alone "unwarranted" (Wolfe 2017, PMID 28852372). If you already eat enough protein, this is a low-calorie sipper, not a growth lever.

1. [1] Jackman 2017 PMID 28638350 — Branched-Chain Amino Acid Ingestion Stimulates Muscle Myofibrillar Protein Synthesis following Resistance Exercise in Humans. In young men, ingesting 5.6 g of BCAAs alone after resistance exercise raised myofibrillar muscle protein synthesis ~22% above a calorie-matched placebo. This is the evidence that BCAAs do something real — but the authors note the response is well below what intact protein produces, because BCAAs lack the other essential amino acids needed to maximally build muscle protein. The basis for ranking on leucine dose while caveating that BCAAs alone are submaximal.
2. [2] Wolfe 2017 PMID 28852372 — Branched-chain amino acids and muscle protein synthesis in humans: myth or reality?. A critical review concluding that the claim BCAAs alone produce an anabolic response or meaningfully stimulate muscle protein synthesis in humans is "unwarranted" — because synthesizing new muscle protein requires all the essential amino acids, and supplying only three (leucine, isoleucine, valine) leaves the other six rate-limiting. The anchor for our honest "BCAAs vs complete protein" caveat.
3. [3] Moberg 2016 PMID 27053525 — Activation of mTORC1 by leucine is potentiated by branched-chain amino acids and even more so by essential amino acids following resistance exercise. Head-to-head in humans after resistance exercise, activation of the muscle-building mTORC1 pathway ranked: leucine alone < BCAAs < all nine essential amino acids. Adding the full EAA complement produced the strongest and most sustained anabolic signal. Direct evidence that a full-spectrum EAA (or complete protein) outperforms isolated BCAAs — the reason two EAA products (Cellucor, Thorne) are on this list.