In particular, some middle-aged and elderly people who are used to eating vitamins as snacks and are keen on health care are even more worried. Do you dare to eat this vitamin?

Let's talk about vitamins first.

Vitamins are essential nutrients for human growth, normal metabolism and health.

Except for a few vitamins that can be synthesized in human body or produced by intestinal bacteria, most vitamins need to be taken from food.

Under normal circumstances, a small amount of vitamins can meet human needs.

Classification of vitamins

Vitamins are divided into water-soluble vitamins and fat-soluble vitamins.

① Water-soluble vitamins include vitamin B 1, B2, B4, B6, B 12, nicotinic acid, nicotinamide, vitamin C, folic acid, pantothenic acid, etc.

② Fat-soluble vitamins include vitamins A, D, E, K, etc.

Factors affecting vitamin deficiency

① Insufficient intake of human body;

(2) the absorption capacity decreases;

(3) Increased demand, such as infants, pregnant women and lactating women;

(4) Increased catabolism;

⑤ Intestinal flora imbalance;

6. Pathological state of human body and insufficient medication, such as long-term use of cephalosporins, carbapenems or oxycephalosporins and laxatives.

Vitamin deficiency or excess will have a great impact on human health.

Harm of vitamin deficiency:

① Vitamin B 1 deficiency can cause beriberi, neuritis, loss of appetite, indigestion and growth retardation.

② Vitamin B2 deficiency can cause oral ulcer, angular stomatitis, glossitis, cleft lip, keratitis and seborrheic dermatitis.

③ Vitamin B3 (nicotinic acid) deficiency can cause pellagra.

④ Vitamin B6 deficiency can cause skin and nervous system diseases, such as peripheral neuritis.

5. Vitamin B9 (folic acid) deficiency can cause leukopenia, red blood cell volume enlargement, megaloblastic anemia and thrombocytopenia.

6. Vitamin B 12 deficiency can lead to megaloblastic anemia.

⑦ Vitamin C deficiency can cause scurvy and decrease resistance.

8. Vitamin A deficiency can cause corneal softening, such as night blindness, keratoxerosis, dry skin and desquamation.

Pet-name ruby, vitamin D deficiency can cause rickets in children and osteoporosis in adults.

Attending, vitamin E deficiency can cause infertility, habitual abortion, muscle atrophy and so on.

? Vitamin K deficiency can cause coagulation primer synthesis disorder, affect the coagulation process, and cause bleeding.

Lack of vitamins can cause the above diseases. A balanced diet is the best source of vitamins. Healthy people who usually have a completely balanced and reasonable diet do not need to supplement vitamins.

Harm of excessive vitamin supplementation

① Excessive vitamin B 1 can cause headache, dysphagia, itching, facial edema, wheezing, erythema, bronchial asthma, urticaria and contact dermatitis shock.

② Excessive vitamin B2 can cause yellow urine, occasional allergic reaction and rare hyperthyroidism.

③ Excessive vitamin B6 can cause serious nerve sensory abnormality, and progressive gait instability leads to numbness of feet and inflexibility of hands.

4. Excessive vitamin C can lead to diarrhea, bright skin, headache, frequent urination, nausea, vomiting, stomach discomfort and stomach cramps.

5. Excessive vitamin A can cause chronic poisoning, such as fatigue, weakness, general malaise, fever, increased intracranial pressure, nocturia, dry hair or shedding, dry or itchy skin, weight loss, limb pain, anemia, exophthalmos and severe headache.

6. Excessive vitamin D can lead to low fever, irritability and crying, spasm, anorexia, weight loss, hepatomegaly, kidney damage and bone sclerosis.

⑦ Excessive vitamin E can cause blurred vision, breast enlargement, flu-like syndrome, stomach cramps, fatigue and so on.

8. Excessive vitamin K 1 can cause vomiting, abnormal taste, sweating and bronchospasm.

Health tips

The above explains the symptoms caused by vitamin deficiency and overdose.

Vitamins are essential nutrients for the human body, and can be supplemented in moderation when lacking.

However, vitamins are not "tonics", and improper application will cause poisoning. Daily use of vitamins, whether preventive or therapeutic, must be carried out under the guidance of a doctor or pharmacist.