The Vitamin Shoppe Vitamin B2 100 mg

Our assessment

The evidence shows that Vitamin B2 (riboflavin) at 100 mg is a well-researched supplement for supporting energy metabolism. Data on this specific dose is not available for general population benefits, but the nutrient is essential for converting food into cellular energy [NIH ODS].

How it works

Think of vitamin B2 as a key cofactor — it helps activate other B vitamins and supports the electron transport chain, which is how your cells produce energy from the food you eat [NIH ODS]. It also acts as an antioxidant, helping your body manage oxidative stress [NIH ODS].

Safety profile

Data not available for adverse event reports specific to this product. At 100 mg, riboflavin is generally considered safe, as excess is excreted in urine. The upper intake level is not established, but very high doses may cause bright yellow or orange urine, which is harmless [NIH ODS].

Our recommendation

Start with one 100 mg capsule daily with food. This dose is well above the RDA (1.1–1.3 mg for adults) and is typically used for specific therapeutic purposes under medical guidance [NIH ODS]. Data not available for long-term use at this dose, so consult your healthcare provider before starting.

Supplement labels contain several key sections regulated by the FDA:

• Serving Size — The recommended amount per dose. Always check this — some products require multiple capsules per serving.
• Amount Per Serving — Shows the quantity of each nutrient in the product, typically in IU (International Units), mg (milligrams), or mcg (micrograms).
• % Daily Value (%DV) — Indicates how much a nutrient in a serving contributes to a daily diet. 5% DV or less is low; 20% DV or more is high.
• Other Ingredients — Lists inactive ingredients like fillers, binders, and capsule materials (e.g., gelatin, cellulose, magnesium stearate).
• Suggested Use — The manufacturer's recommended directions for taking the supplement, including timing and dosage.

Source: FDA Dietary Supplement Labeling Guide