Nancy Samolitis, MD, founder of Facile skin care and board-certified dermatologist practicing in Los Angeles, told Glossy
As a dietary supplement, take one (1) tablet daily, or as recommended by a healthcare practitioner
Officially, the FDA cites: Insufficient large-scale clinical trials Concerns about consistency, sourcing, and manufacturing standards The need to meet formal drug approval requirements Critics argue (fairly) that this system: Favors large pharmaceutical companies Makes it hard to approve naturally occurring peptides Leaves promising, low-risk compounds in regulatory limbo The short version: This FDA restrictive regulatory change of mind wasnt driven by a sudden safety scare, it was driven by regulatory process and economics
It is used strictly as a controlled diluent , and endotoxin control depends on peptide purity, validated testing, and proper laboratory handling
There is limited human evidence for muscle, bone, tendon and ligament healing benefits of thymosin beta-4
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