For vitamin B12 to be absorbed from the gut, it must bind to a protein called intrinsic factor, which limits how much B12 the gut can take in at one time
Smiricky-Tjardes MR, Grieshop CM, Flickinger EA, Bauer LL, Fahey GC Jr (2003) Dietary galactooligosaccharides affect ileal and total tract nutrient digestibility, ileal and fecal bacterial concentrations, and ileal fermentative characteristics of growing pigs
It also contains the Methylxanthines that stimulates skin microcirculation and therefore positively influence the tone and health of the skin
However, other authors found no positive response in laying hens, when using up to 500 mg/kg of L-carnitine in different feeding schemes (Corduk and Sarica 2008 and Daskiran et al
It works at regulating skin pigment, improving elasticity, reducing wrinkles, and fighting against aging. So, who doesnt want glowing, healthy skin