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In contrast, the passive diffusion process of B 12 absorption normally a very small portion of total absorption of the vitamin from food consumption may exceed the haptocorrin- and IF-mediated absorption when oral doses of B 12 are very large, with roughly 1% efficiency

This has led many functional medicine practitioners to seek alternative delivery methods that can bypass the destructive environment of the stomach and deliver the intact molecule directly to the cells that desperately need it

B12 injections have been used to treat various other issues in the past, but more recently they have proved successful in helping to alleviate lower back pain

After wash-out and crossover, increases were again most evident when HA + GSH-C4 was introduced