You may need B12 injections if you: Have been diagnosed with pernicious anemia Have gastrointestinal issues (e.g., Crohns disease, celiac disease, or after bariatric surgery) Follow a strict vegan or vegetarian diet without adequate supplementation Are over the age of 50, as absorption decreases with age Take certain medications that interfere with B12 absorption Have chronic fatigue, memory issues, or nerve problems due to B12 deficiency
Luyster, F
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Finally, the statement of Marshall Urist, the BMPs concept founder, about the mechanism of the release from BMP delivery system to mesenchymal cell receptor mechanisms as obscure and under intensive investigation in academic and industrial laboratories (Urist, 1996) is true also nowadays, and it can be generally applied to any of the peptide + carrier complexes