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Sublingual formulations, which dissolve under the tongue, are often marketed as superior to standard tablets, but most of the dissolved vitamin is actually swallowed with saliva and absorbed through the digestive tract similarly to regular oral supplements

A 2020 study in Frontiers in Pharmacology found that BPC-157 enhanced tendon-to-bone healing in a rat model by upregulating collagen type I and III expression, resulting in improved mechanical strength and reduced scar tissue formation (Chang et al., 2020)

Those are solid numbers for sensitive skin users who usually have to sacrifice efficacy for gentleness

Some weight-loss clinics offer vitamin B12 injections as part of their weight-loss program