1, according to the body's symptoms to judge, the human body lacks vitamin B2, mainly appear some mucosal lesions. For example, mouth ulcers, stomatitis, scrotal inflammation and so on.

2, may also appear blurred vision, eye congestion and other eye problems.

3. Many problems in the body can be diagnosed through blood tests. If the body is deficient in vitamin B2, the level inside the blood will be smaller than the average, which is very accurate to determine whether the lack of vitamin B2.

4, and the blood test is also very convenient, as long as a small amount of blood can be drawn, basically will not have too obvious pain.

5, long-term lack of vitamin B2 is perhaps the most significant disease is to say that there has been inflammation of the mouth, for example, the corners of the mouth has been inflammation, mouth ulcers, sore gums, swollen mouth these.

Excess riboflavin is excreted in the urine (usually temporarily causing the urine to turn bright yellow a few hours after taking it), so there's no risk of overdose **** same. However, very high doses may lead to an increased risk of kidney stones. There may also be sensitivity to light, itching, numbness and burning/stinging sensations at high doses. Allergies and anaphylactic reactions (severe systemic allergic reactions) have also been reported, although rarely.

Vitamin B2 is involved in the normal growth of cells in the body, especially in the curved parts that are constantly in motion, and riboflavin is needed for cell regeneration after injury. Supplementation of riboflavin to combat iron deficiency anemia has an important important. There are studies on riboflavin and retinal sensing of light related.

Riboflavin deficiency presents with specific epithelial damage, seborrheic dermatitis, mild diffuse epithelial keratosis with seborrheic alopecia and neurological disorders.

Vitamin B2 rich foods are animal foods, with its animal offal such as liver, kidney, heart muscle and other highest content; followed by eggs and dairy; soy a variety of green leafy vegetables, other plant foods are much lower content. Vegetarians are relatively easy to lack, so their diet needs to pay more attention to eat more green leafy vegetables and whole grains and soy products to keep up with the intake.