Not into muscle
Is there actually any human evidence that this works
A systematic review and metaanalysis on randomized clinical trials Mitra Hariri, Bahareh Amirkalali, Ensiyeh Mollanoroozy, Ali Gholami Food Science & Nutrition.2022
Handling and Stability Risks Improper handling exposure to light, heat, repeated freeze-thaw cycles, or strongly alkaline conditions can degrade the peptide or disrupt copper coordination, producing experimental variability that is sometimes mistaken for biological inconsistency
Long-Term: Sustained anti-inflammatory effects, improved joint comfort, and ongoing protection of muscles, connective tissue, and digestive health with continued therapy.
N-Acetyl-L-Cysteine (NAC)