Tag: Riboflavin dosage

The human body has a limited capacity to absorb riboflavin (vitamin B2), with studies suggesting a maximum absorption per dose. This mechanism, combined with its water-soluble nature, means that higher intakes are generally considered safe, but the daily recommended amount is significantly lower.

According to Harvard's T.H. Chan School of Public Health, no Tolerable Upper Intake Level (UL) has been established for riboflavin due to its limited absorption and the low risk of toxicity. As a water-soluble vitamin, any excess riboflavin is typically excreted from the body, making a true overdose extremely unlikely.

While excess riboflavin is typically harmlessly excreted in the urine, some individuals report digestive discomfort, bloating, and nausea, leading many to ask: is B2 hard on your stomach?. This is most often associated with high-dose supplements rather than dietary intake.