Acetyl hexapeptide-38 is a 'Botox-like' peptide ingredient that mainly works by inhibiting neurotransmitter release to relax muscles.
Acetyl hexapeptide-38 is commonly used in anti-wrinkle skincare products (like for improving dynamic lines). Its effects are limited to the epidermis or superficial muscles and can't penetrate deep fat or glandular tissue, so it has no direct connection to breast size increase.
