While B12 is important for overall health and energy, it's not typically the go-to for intentional weight gain
There is one open-label intravenous safety pilot in two healthy adults, who received single doses of 10 mg and 20 mg with no comparator, no blinding, and short-term observation limited to vital signs, self reported symptoms and labs across two days [4]
Methyl B12 promotes methylation, which is a form of detoxification in the body
Such changes in urine color are due to a yellow pigment called urochrome or urobilin, which is a breakdown product of the bloods hemoglobin that gets excreted through the kidney
Vitamin B6 (pyridoxine) serves as coenzyme and is involved in the metabolism of protein and carbohydrates, the production of insulin and red and white blood cells, and the synthesis of neurotransmitters, enzymes, and prostaglandins