Integrative Therapeutics Riboflavin 30 Tablets Guide

Integrative Therapeutics Riboflavin 30 Tablets delivers 400 mg of Riboflavin (Vitamin B2) per tablet — a potent dose of this essential water-soluble vitamin that the body uses to produce two critical coenzymes: flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD). These coenzymes are involved in a vast network of enzyme reactions that span energy metabolism, red blood cell production, and the activation of other vitamins.

Riboflavin is the central component in FAD and FMN, which serve as electron carriers in the mitochondrial respiratory chain and are required for oxidative phosphorylation and ATP production. Without adequate Riboflavin, the body cannot efficiently release energy from carbohydrates, fats, and proteins, making this nutrient indispensable for overall vitality.

This product is gluten-free and vegan, and contains no wheat, soy, dairy, or artificial flavors — making it accessible to individuals following a range of dietary protocols.

Riboflavin plays a non-redundant role in human metabolism. As the precursor to FAD and FMN, it fuels the mitochondrial electron transport chain, beta-oxidation of fatty acids, and citric acid (TCA) cycle function. FAD directly accepts electrons at Complex II of the electron transport chain, making Vitamin B2 indispensable for cellular ATP production.

Beyond energy production, Riboflavin is the obligate coenzyme (as FAD) for methylenetetrahydrofolate reductase (MTHFR), the enzyme that converts 5,10-methylenetetrahydrofolate to 5-methyltetrahydrofolate — the cofactor form necessary for the remethylation of homocysteine to methionine. Research demonstrates that Riboflavin deficiency impairs MTHFR activity, reduces 5-MTHF levels, and elevates homocysteine, especially in individuals with the MTHFR 677TT genotype where plasma homocysteine is inversely related to Riboflavin status.

Riboflavin also supports the conversion of other B vitamins: FAD is required for the conversion of tryptophan to niacin (vitamin B3), and FMN is needed for the conversion of vitamin B6 to its active coenzyme form, pyridoxal 5′-phosphate. In this way, adequate Riboflavin status supports the broader B-vitamin network.

The body does not store Riboflavin in large amounts — only small reserves exist in the liver, heart, and kidneys. Most Riboflavin is used immediately and excess is excreted in the urine, which underscores the importance of consistent daily intake.

This product may be well-suited for adults seeking targeted support for energy metabolism, methylation, and cellular energy production. Research suggests that several population groups may be at elevated risk of Riboflavin inadequacy, including individuals who follow diets low in meat and dairy (considered the best dietary sources of Riboflavin), those on plant-based diets, and people following a gluten-free diet who do not consume enriched wheat foods.

Pregnant and breastfeeding women have increased Riboflavin requirements. Older adults and adolescents may have inadequate intake even in high-income countries despite food availability. Chronic alcohol consumption has been associated with impaired Riboflavin status through multiple mechanisms, including inhibition of intestinal Riboflavin transporters.

Individuals taking certain medications — including phenothiazine derivatives (such as chlorpromazine), tricyclic antidepressants (such as imipramine and amitriptyline), and the anticonvulsant phenobarbital — may experience impaired Riboflavin metabolism and could benefit from supplementation under professional guidance.

Those with the MTHFR C677T polymorphism may find Riboflavin supplementation particularly relevant, as research suggests Riboflavin's role as the FAD cofactor for MTHFR is especially important in this genetic subgroup for supporting healthy homocysteine metabolism.

Adults take 1 tablet daily or as recommended by a healthcare professional.

Riboflavin has a favorable safety profile. It is highly water-soluble with limited absorption — the gut can only absorb a limited amount at one time, and excess is quickly excreted in the urine. No adverse effects have been reported from high Riboflavin intakes from foods or supplements up to 400 mg daily for at least 3 months. No Tolerable Upper Intake Level (UL) has been established because a toxic level has not been observed.

When Riboflavin is taken in amounts beyond what the body uses immediately, excess may cause urine to become bright yellow. Although the color change may be unexpected, it is harmless and simply reflects normal excretion of unused vitamin.

Riboflavin absorption increases when ingested along with other foods and in the presence of bile salts. The vitamin is sensitive to light — store tablets away from direct light to preserve potency.