Method Absorption Rate Advantages Disadvantages Oral pills 1.2-40% depending on intrinsic factor Convenient, widely available Poor absorption, especially with age or GI issues Sublingual Slightly better than pills No need for intrinsic factor, easy to use Still less effective than injectable forms In-clinic IM injection Nearly 100% Highly effective, professionally administered Requires clinic visits, potential travel and waiting time At home B12 injection Nearly 100% Highly effective, convenient, no travel needed Requires training, prescription, and comfort with self-injection IV infusion 100% Immediate delivery to bloodstream Most expensive, requires professional administration For many people especially those with serious deficiencies, digestive disorders, or pernicious anemia at home B12 injection offers the sweet spot of effectiveness and convenience
HUBERMAN: It releases luteinizing hormone, and it releases follicle-stimulating hormone
doi: 10.1194/jlr.RA119000256 142 WenYChenHZhangLWuMZhangFYangDet al
Improvement of performance in sports: It helps cell oxygenation and increases energy levels, so it can improve physical performance
An initial consultation will confirm whether you are a good candidate for these injections
Thyroid medications will definitely impact your thyroid lab tests because they contain active thyroid hormones