There are many potential reasons for low ferritin levels, including diseases that impair absorption of iron, such as celiac disease, Crohns and more
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
Randomized Clinical Trial A randomized controlled trial was performed (registered at www.chictr.org.cn with the registry Number of ChiCTR1800019271, registered at 02-November-2018)
Hirano, K.-I., Ikeda, Y., Zaima, N., Sakata, Y
[10] There have been no documented reports of serious organ toxicity or systemic reactions caused by excess biotin
This option can be much better for those who have a deficiency, have trouble absorbing nutrients from vitamins taken orally or through diet, or have a medical condition or symptoms that can be helped with the intake of regular vitamin D