Disease analysis: Hello, vitamin B2, also known as riboflavin, is soluble in water and easily decomposed when it meets alkali and light, which is why you don't put alkali in porridge. It mainly exists in cereals, vegetables, milk, fish and other foods. Without vitamin B2, it is easy to suffer from oral inflammation, dermatitis and microvascular hyperplasia. Guidance: Hello, you can take vitamin B2, but you should eat more foods rich in vitamins, such as vegetables, fruits and cereals. I suggest you take vitamin B2 after meals, which is better absorbed after meals than before. Take it strictly according to the instructions and don't abuse it. As long as you take it symptomatic, there are no side effects.