l carnitine before workout or after Fast & Up L-Carnitine Best Time to Take L-Carnitine:

Rather than raising NAD+ systemically (as NMN or NR supplementation does), NNMT inhibition preserves NAD+ specifically in the tissue where metabolic dysfunction is most pronounced a precision approach that appeals to researchers studying tissue-specific metabolic regulation

Shen Y, Fan N, Ma SX, Cheng X, Yang X, Wang G

Some research says they might help cancer cells grow or mess with chemotherapy

This rapid clearance profile contributes to its exceptionally high safety margin and makes it highly suitable for daily, or even multi-dose, supplementation protocols

The carnitine molecule supports the movement of fat molecules into the mitochondria as an energy source as it is converted into ATP (Adenosine Triphosphate), which may help support healthy brain function and cognitive response. In addition, studies suggest that carnitine helps to support increased effects on healthy antioxidant activity.