What community sources describe when little changes: the most consistent community feedback for slow responders points to insufficient or omitted UV exposure, very low dose, or a darker baseline phototype that masks the relative gain
Biscotti, P., Del Bo', C., Carvalho, C., Torres, D., Reboul, E., Pellegrini, B., Vinelli, V., Polito, A., Censi, L., Porrini, M., Martini, D., & Riso, P
But around week two or three, something started to change
On average, use it for at least 2 to 3 months
The real linchpin for valid, repeatable results often comes down to what happens next: reconstitution
Since the L-carnitine used in these studies was not labeled, we could not determine how much of the administered L-carnitine and its metabolites distributed to different tissues in the body