For everyday supplement use, though, the real comparison is between oral formats, and that's where bioavailability, how readily an ingredient is made available to the body, comes up
Skin improvements from dietary changes typically take 4-6 weeks to become noticeable, as this is how long it takes for new skin cells to reach the surface
We were able to inhibit the synthesis of endogenous carnitine using MD and thereby establish a low-carnitine model in the zebrafish and tilapia in our previous studies ( Reference Li, Li and Qin 32 , Reference Pan, Li and Li 34 )
If this doesnt sound like you then you need to focus more on gut healing and balancing the biome with nutrition, pre-and probiotics
Widjaja CE, Olvera JG, Metz PJ, Phan AT, Savas JN, de Bruin G, et al
doi:10.2337/dc22-S005 ADA