Direct Dosage: A single B12 injection often delivers a much higher dose directly into the system than a typical daily oral tablet, particularly when considering the limited absorption rate of the latter, contributing to their perceived and actual strength. However, for individuals with mild dietary deficiencies and no underlying absorption problems, high-dose oral B12 supplements (e.g., 1000-2000mcg daily) can sometimes overcome the need for intrinsic factor by allowing for a small amount of passive absorption, eventually raising levels, though this method is less predictable and slower than direct injection
if I gain the weight back, I'll go back on it." Which is not so crazy, but if you're diabetic, you're not going to stop your insulin and then watch your sugar go up and go back on it when your sugar comes down
Results may look different for each individual based on their unique situation
L-carnitine modest, shrinking effect A 2016 meta-analysis of 9 RCTs (n=911) found carnitine users lost about 1.33 kg more than controls, and a larger 2020 meta-analysis of 37 RCTs (n=2,292) found roughly 1.21 kg
Evidence from 8 randomized controlled trials (6361 participants) also suggested these effects could be maintained for up to 3.5 years, although long-term safety data were limited