Subcutaneous bioavailability may land somewhere around 30 to 80 percent depending on the site, and local injection could in theory help in superficial, low-blood-flow tissues like tendons
Biotin (Vitamin B7) serves as a coenzyme for carboxylase enzymes in fatty acid synthesis, gluconeogenesis, and amino acid metabolism
10.1016/j.ccr.2012.10.024 Cancer Cell 12 JakovcevskiM.RuanH.ShenE
Drug Chem Toxicol 45:17231731 Shibayama Y, Ushinohama K, Ikeda R, Yoshikawa Y, Motoya T, Takeda Y, Yamada K (2006) Effect of methotrexate treatment on expression levels of multidrug resistance protein 2, breast cancer resistance protein and organic anion transporters Oat1, Oat2 and Oat3 in rats
This study lacked a placebo control, so results should be interpreted cautiously
Price-Relating Factors The site of the clinic