Source Naturals Vitamin B-2 (riboflavin) is a component of two key enzymes: flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD). These enzymes are important in energy production and are essential for normal fatty acid and amino acid synthesis. Because of their vital roles in cellular metabolism, cellular growth cannot take place in the absence of vitamin B-2.*

Suitable for vegetarians. Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, preservatives, or artificial color, flavor or fragrance.

Suggested Use: As a dietary supplement, 1 tablet daily.

Frequently Asked Questions

What does Vitamin B-2 (riboflavin) do in the body?

Vitamin B-2, or riboflavin, is converted into the active coenzymes FMN and FAD, which are essential for the body's energy-producing reactions. These coenzymes help metabolise fats, proteins, and carbohydrates, and support cellular growth and repair. Riboflavin also plays a role in converting other B vitamins — including B-6 — into their active forms.*

Why does urine turn yellow when taking riboflavin?

The bright yellow colour is caused by riboflavin itself — it is the pigment that gives the vitamin its yellow-green hue. When more riboflavin is consumed than the body immediately needs, the excess is excreted in urine, producing the characteristic colour. This is harmless and simply indicates the body is processing the vitamin.

Can I take Vitamin B-2 with other B vitamins?

Yes. Riboflavin works synergistically with other B vitamins and is often taken as part of a B-complex. It plays a specific role in activating B-6, making it an important complement to a full B-vitamin supplement regimen.*

Is Source Naturals Vitamin B-2 free from common allergens?

Yes. Source Naturals Vitamin B-2 is suitable for vegetarians and is free from yeast, dairy, egg, gluten, soy, and wheat. It contains no sugar, artificial colour, flavour, or fragrance, making it a clean, allergen-friendly B vitamin option.