Neither is sufficient alone, neither makes the other redundant
Epithalon is a synthetic tetrapeptide isolate composed of the four amino acids alanine, glutamic acid, aspartic acid, and glycine
Tirzepatide holds FDA approvals as Mounjaro for type 2 diabetes (2022) and as Zepbound for chronic weight management (2023) and for moderate-to-severe obstructive sleep apnea (2024), and it is EMA-approved as well
Kakazu, Yuji
Amides Specification Reference Organic Chemistry, Nitrogen compounds 34.3 Quick Notes Amide formation : Ammonia + acyl chloride forms a primary amide Primary amine + acyl chloride forms a secondary amide Reactions of amides : Hydrolysis : Acid hydrolysis gives a carboxylic acid Alkali hydrolysis gives a carboxylate salt Reduction with LiAlH forms an amine 4 Basicity : Amides are much weaker bases than amines because their nitrogen lone pair is delocalised into the carbonyl group, reducing its ability to accept protons
It is not very stable either, when exposed to sunlight, it kind of breaks down and loses its effectiveness (not instantly, but over time - it loses 10% of its SPF protection ability within 35 mins)