Condition Guide
Muscle Building
Hypertrophy, strength, and body recomposition
Top Peptides for Muscle Building
Ranked by how frequently users report positive results
IGF-1 LR3
A modified analog of Insulin-like Growth Factor 1 engineered for a longer half-life (~20–30 hours vs. 15 min for native IGF-1). Reported for dramatic muscle growth, enhanced recovery, nutrient partitioning, and fat loss.
Follistatin 344
A naturally occurring protein that inhibits myostatin - the biological brake on muscle growth. Used by advanced bodybuilders targeting extreme lean mass gains.
Quick Facts
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Peptides in this category
6
Total benefits documented
IGF-1 LR3
Most popular choice
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IGF-1 LR3
A modified analog of Insulin-like Growth Factor 1 engineered for a longer half-life (~20–30 hours vs. 15 min for native IGF-1). Reported for dramatic muscle growth, enhanced recovery, nutrient partitioning, and fat loss.
Follistatin 344
A naturally occurring protein that inhibits myostatin - the biological brake on muscle growth. Used by advanced bodybuilders targeting extreme lean mass gains.