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Forms of the vitamin, known as retinoids, are involved in the regulation of gene expression, cellular proliferation and differentiation, growth and development, vision, and immunity (see the article on Vitamin A)
Best For: Athletes focused specifically on hypertrophy and acute recovery
Metformin for weight loss and metabolic control in overweight outpatients with schizophrenia and schizoaffective disorder
Methylmalonic acid is generally the more B12-specific marker, while homocysteine and the other markers are best interpreted with kidney function and folate status in mind
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