It is available only as a compounded preparation through 503A/503B pharmacies under valid prescription
Francis GL, Ross M, Ballard FJ, et al
Gastric Intrinsic Factor Deficiency with Combined GIF Heterozygous Mutations and FUT2 Secretor Variant. Biochimie, vol
Others who have difficulty absorbing nutrients may also have low B12 levels such as individuals who have had gastric bypass surgery or who have certain digestive disorders
Vitamin D The NHS recommends: Adults should consider 10 micrograms (400 IU) daily Adults should not regularly exceed 100 micrograms (4,000 IU) daily unless advised by a healthcare professional Vitamin K2 There is currently no official UK recommended intake specifically for vitamin K2
Sterile Water: A Critical Storage Distinction This is a point of confusion we see often, and it can lead to catastrophic errors in research