All protein powders can be considered ultra-processed food, which has pros and cons, as discussed in our Protein Powders Review
While oral B12 supplements are available, vitamin B12 injections have advantages including enhanced absorption since it bypasses digestion, a fast-acting energy boost from quick absorption, higher blood levels reached versus pills, lasting benefits between maintenance doses, improved concentration and mental clarity, and often more affordable and convenient long-term
Oral research-planning ranges are usually higher than the subcutaneous ranges to account for lower absorption across the gut lining
As with any medical treatment, it's important to weigh the potential benefits against possible side effects and costs
Individually each of the twenty amino acids is a relatively small molecule