Alpha Lipoic Acid 50 mg, Chromium Picolinate 200 mcg, Methylcobalamin 750 mcg, Omega 3 Fatty Acid 500 mg, Selenium 75 mcg Hard-gelatin capsules

Vitamin B12 supplies cofactors for methionine synthase and methylmalonyl-CoA mutase. These reactions support methionine formation and conversion of methylmalonyl-CoA to succinyl-CoA. B12 is involved in DNA synthesis, red-cell formation and nervous-system function.

Free B12 combines with intrinsic factor and is taken up in the distal ileum. Absorption becomes less efficient as the dose exceeds intrinsic-factor capacity; the NIH review reports about 2% absorption at 500 micrograms and 1.3% at 1,000 micrograms. Cyanocobalamin and hydroxocobalamin are converted into active cobalamin forms. These are oral nutrient data, not injectable-product pharmacokinetics.

Selenium is incorporated into selenoproteins including glutathione peroxidases and thioredoxin reductases. These proteins contribute to thyroid-hormone metabolism and protection against oxidative damage.

Absorbed organic and inorganic selenium is metabolized toward an intermediate used to synthesize selenocysteine. A substantial body pool is in skeletal muscle. Urinary excretion is the main mechanism maintaining balance; excretion through feces and lungs also increases at high intake. This general physiology does not establish equal bioavailability among selenium compounds.

Chromium has been investigated for possible effects on insulin action and glucose metabolism. The NIH review describes inconsistent clinical findings, so a definite glucose-lowering mechanism or benefit should not be assumed for a chromium supplement.

Absorption of dietary chromium is low, estimated at approximately 0.4–2.5%. The NIH review gives illustrative absorption estimates of about 1.2% for chromium picolinate and 0.4% for chromium chloride, with dietary factors affecting uptake. These reference estimates do not establish bioavailability of this finished product.

Alpha-lipoic acid is a coenzyme in mitochondrial multienzyme complexes. The reference also describes antioxidant biochemical effects and experimental findings in diabetic nerve models; these do not establish that every supplement or combination produces the same clinical benefit.

After a 600 mg oral tablet, the reference reports rapid absorption, a peak at approximately 0.3–0.5 hours and a plasma half-life of 20–30 minutes. Metabolism includes oxidative chain shortening and sulfur methylation. Only small quantities of unchanged substance appear in human urine. The high urinary recovery percentages reported in animal experiments are not presented here as human elimination data.