Choosing based on which one has more animal evidence is reasonable
Most people get enough vitamin B12 in their diet, but a deficiency may occur in certain health conditions (such as poor nutrition, stomach/intestinal problems, infection, cancer)
[8] [4] The body cannot produce B12 naturally, so it must be obtained through diet (primarily animal products) or supplementation
Despite a potential sacrifice in bioavailability over injections, some researchers may wish to use a BPC-157 + TB-500 nasal spray to study the effects of concurrent administration
The needle creates minor tissue trauma
Due to these characteristics, BPC-157 has been evaluated in terms of its potential to aid in: Gut lining and intestinal healing Repairs of tendon and ligament