NAD+ is not a peptide, the phrase NAD peptide is a marketing label rather than a molecule, and the two therapies are built for different jobs: NAD+ as a systemic energy and repair foundation, peptides as targeted signals for repair, skin quality, and recovery
Liposomal glutathione encases glutathione in tiny fat bubbles (liposomes), acting like a stealth vehicle that successfully ferries active glutathione past digestive obstacles and helps maintain healthy blood levels that support actual immune function
Walshe JM, Yealland M
10.1038/s41580-020-00324-8 57 JooN
Diverse biological functions of vitamin K: from coagulation to ferroptosis
It reflects what you are not paying for at the cheap end: no provider involvement, no individualized dosing, no injection training, no sterile reconstitution guidance, and no recourse if you have a reaction