l carnitine sebum Topically applied l‐carnitine effectively reduces secretion in human skin - Peirano - 2012 - Journal of Cosmetic Dermatology L-Carnitine Body Contouring Institute BCN

However, reconstitution matters here as well, especially if its not researched in oral form

Son application est locale et ne soulve pas de problme de biodisponibilit systmique, mais les donnes se limitent une seule tude sur 30 participantes

If you need to boost the low levels of this vitamin in your body, you can take it as an oral supplement or as an injection both either in the form of cyanocobalamin or methylcobalamin

Topical application, the most common route of use, has demonstrated excellent safety with minimal adverse effects reported

[24]S.A

Patients with an underactive thyroid should consult their provider