does l carnitine make you have diarrhea L-Carnitine Side Effects & Safety:

Finally, hydrogels with good biocompatibility, low immunogenicity, and modifiable physical and chemical properties can be ideal carriers to improve efficacy and reduce the toxicity of natural products (Yegappan et al., 2018

Mandel S, Amit T, Reznichenko L, Weinreb O, Youdim MBH (2006) Green tea catechins as brain-permeable, natural iron chelators-antioxidants for the treatment of neurodegenerative disorders

Pure glycine powder may be easily combined with water, fruit juice or other liquids

Although applying it to the skin could help, the results might not show up immediately as they would with other approaches