How is anyone sure if a vitamin works the way it鈥檚 supposed to? With B2, your urine should turn bright yellow. That鈥檚 why I鈥檝e used this brand for 5 years.
How is anyone sure if a vitamin works the way it鈥檚 supposed to? With B2, your urine should turn bright yellow. That鈥檚 why I鈥檝e used this brand for 5 years.