eClinicalMedicine [Internet] , 69
According to the Centers for Disease Control and Prevention, many Americans have at least one micronutrient deficiency due to factors such as poor diet, age-related hormonal changes, and impaired nutrient absorption related to digestive disorders---yet many remain undiagnosed
While effective in supplementing B12 levels, they are not derived from natural food sources and are formulated to mimic the active forms of B12 found in the body
Blood work can help clarify vitamin levels or other possible causes of persistent fatigue
Across all six studies, the safety findings were consistent: no serious adverse events, no immunogenic responses, no changes in IGF-1, no glucose or insulin disruption
Sequence: Tyr-Leu-Arg-Ile-Val-Gln-Cys-Arg-Ser-Val-Glu-Gly-Ser-Cys-Gly-Phe (with disulfide bridge)