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Unlike oral supplements, an injection delivers vitamin B12 directly into the body without relying on digestive absorption which can be reduced by age, certain medications such as proton pump inhibitors or metformin, or gastrointestinal conditions

Damage to this layer can become permanent

Example gradual titration (5/5 vial, once daily SC) - research reference only Weeks 1-2 Tesamorelin 167 mcg Ipamorelin 167 mcg Units (0.10 mL = 10u) 10 units (0.10 mL) Weeks 3-4 Tesamorelin 333 mcg Ipamorelin 333 mcg Units (0.10 mL = 10u) 20 units (0.20 mL) Weeks 5-8 Tesamorelin 500 mcg Ipamorelin 500 mcg Units (0.10 mL = 10u) 30 units (0.30 mL) Weeks 9-16 Tesamorelin 667 mcg Ipamorelin 667 mcg Units (0.10 mL = 10u) 40 units (0.40 mL) Illustrative titration for the 5/5 vial only

doi:10.1007/s00380-004-0822-4