Here is an an easy-to-follow guide: Where can I purchase needles and syringes from
it would apply only to oral supplements
B12 and Older Adults While a B12 deficiency isnt as prevalent as something like vitamin D or folate, evidence suggests that 10-15% of people over the age of 60 are low in B12, likely due to loss of a protein called intrinsic factor, which is essential for the body to absorb vitamin B12
PubMed Heffernan, M.A., Thorburn, A.W., Fam, B., Summers, R., Conway-Campbell, B., Waters, M.J., & Ng, F.M
If you're taking B12 to boost energy, support mood, or improve overall wellness, knowing when and how to take Vitamin B12 helps you feel the effects faster and more consistently
(Biochem Pharmacol 2018) documented a reduction of -35% in white adipose tissue, -40% in adipocyte volume, -5.1% in body weight and -30% in plasma cholesterol in just 11 days in obese mice (DIO), without any change in food intake