The short answer · Muscle mass
Take l-leucine for muscle mass. This is the one to buy.
Nutricost, L-Leucine, Unflavored, 17.9 oz (500 g)
4.7· 378 ratings· $0.20/serving
L-Leucine 5 g — below the studied 2000-5000 mg window
Of 5,064 products scored for Muscle mass, Nutricost, L-Leucine, Unflavored, 17.9 oz (500 g) ranks #1 with a DoseRank score of 83. L-Leucine is the strongest evidence signal for this outcome.
The form“Why L-Leucine — not Amino Acids or L-Isoleucine?”Evidence Strong evidence
L-Leucine is the strongest evidence signal for this outcome.
- L-LeucineThe pick
Strong evidence · 5 g
The most anabolic branched-chain amino acid, signaling through mTOR to trigger muscle protein synthesis. Dosed in higher ratios than isoleucine and valine in BCAA blends.
- Amino Acids
Strong evidence · 8511 mg
Broad category covering protein's building blocks; supplements span essential and conditionally essential aminos used for muscle repair, energy, and neurotransmitters.
- L-Isoleucine
Limited evidence · 1793 mg
Branched-chain essential amino acid that aids muscle protein synthesis and glucose uptake. One of the three BCAAs, usually taken alongside leucine and valine for exercise recovery.
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Nutricost, L-Leucine, Unflavored, 17.9 oz (500 g) ranks #1 for Muscle mass with a DoseRank score of 83. The score blends clinical strength, evidence, dose fit, trust signals and value across 5,064 products scored for this outcome.
L-Leucine is the strongest evidence signal for this outcome.
L-Leucine at 5 g sits below the studied 2000-5000 mg window. DoseRank scores this product's dose fit at 90 out of 100.
Nutricost, L-Leucine, Unflavored, 17.9 oz (500 g) works out at $0.20 per serving. $0.20 per serving — low price tier for this outcome. The cheapest ranked pick here is $0.14 per serving.
No. Retailer links may be affiliate links, but rankings and placement are never paid. Every product is scored by the same public model, and the ranking is recomputed from the underlying product data rather than edited by hand.
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