Vitamin a can maintain normal visual response, bone development and epithelial tissue of normal form and function. It is mainly derived from milk, eggs, cod liver oil, liver, dark green or dark yellow vegetables and fruits.

Harmful effects of overdose: Vitamin A, if accumulated in large quantities in the body, may cause symptoms of toxicity such as decalcification of bones, joint pain, dry skin and loss of appetite.

2, vitamin d:

Activated vitamin d can promote calcium absorption, which in turn calcifies the bone and maintains normal bones. It is mainly derived from cod liver oil, liver, egg yolk and milk.

Overdose Hazard: Long-term large amounts of oral vitamin D can lead to eye inflammation, itchy skin, anorexia, nausea, vomiting, muscle pain, fatigue and so on.

3, vitamin e:

Vitamin e is related to the role of reproduction, the lack of vitamin e easily lead to infertility. Vitamin e has good antioxidant properties in the body, can delay cellular aging. Mainly from vegetable oils, green vegetables, animal organs, beans, egg yolks, melons and fruits, lean meat, peanuts and so on.

Excessive harm: large doses of long-term use of vitamin e can cause platelet aggregation, the formation of blood clots, but also can lead to gastrointestinal disorders, dizziness, blurred vision, etc., but also can cause excessive menstruation or amenorrhea in women.

4, vitamin b6:

Vitamin b6 is related to metabolism, so its needs with the amount of protein intake to decide. Mainly from wheat germ, milk, yeast, pods of beans, meat, especially liver is good.

Harmful effects of overdose: Taking more than 50 mg of vitamin B6 per day can cause neurological side effects such as numbness in the hands and feet and muscle weakness.