b12 oral vs injection Vitamin Injections vs. Supplements: Which Do You Actually Need? Efficacy of sublingual and oral

When it comes to weight loss, there is mixed evidence regarding the effectiveness of B12 injections

With an impaired immune system, the liver will become depleted from B12 reserves very rapidly

A vitamin B12 shot delivers methylcobalamin directly into the body via intramuscular injection

Estrogen Taking vitamin C with oral contraceptive or hormone replacement therapy might increase your estrogen levels

My TSH and T4 have never been that far out of range but with the proper testing I found Hashimotos, which explained my constant fatigue and irregular periods (they can be anywhere from 14 days to 50+ and last 2-3 days or up to 10, and be very heavy or very light, truly irregular in all manner of ways!) Oh and folate needs testing too