as it is l carnitine iSatori Liquid L-Carnitine LS3® 3000 Acetyl L-Carnitine Powder: Optimize Brain
Description
It is fungal acne-safe and can help with dry skin,

Its probably safe to assume that most or all were dry foods, since that is what the vast majority of dogs are fed in the U.S

Selection of the membrane: The membrane should be able to provide an inert surface for holding the drug formulation

This makes them beneficial for post-procedure or acne-prone skin in addition to anti-ageing
