While it is hard to pick a favorite peptide there are that many to choose from one thats especially close to my heart (and knees) is Body Protection Compound 157, better known as BPC 157or simply BPC
Of course, you probably didn't need this reminder
Standard Dosing Range In preclinical models, BPC-157 accelerated healing across tendon, muscle, and ligament tissue at doses ranging from 110 mcg/kg/day, making human application at 250750 mcg/day practical and safe. Sikiric et al., Current Pharmaceutical Design Injection vs
GROWTH HORMONE & ANTI-AGING Peptides that naturally stimulate growth hormone production for anti-aging, body composition, sleep, and recovery
BPC-157 increases blood flow to damaged areas, stabilizes nitric oxide production, and promotes collagen formation
Muscle tears