Can vitamin tablets replace fruits and vegetables?

　　Nowadays, people are increasingly aware of the importance of vitamin supplements, and more and more multivitamin tablets appear on the market, providing consumers with a variety of choices. Some consumers believe that vitamins are nutrients and the more the better. Taking vitamin tablets every day can completely replace eating fruits and vegetables. Is this approach advisable?

　　★The human body obtains vitamins from fruits and vegetables★

　　Vitamins are indeed an indispensable nutrient for the human body. A deficiency in any of these vitamins can be life-threatening. Vitamins cannot be synthesized in the human body or can only be synthesized in trace amounts, so they must be supplemented by exogenous intake. Vegetables and fruits are the main source of vitamins for the human body.

　　★Fruits and vegetables are more nutritious than vitamin tablets★

　　Vegetables and fruits also contain some substances that are not vitamins but have similar effects on the human body as vitamins, such as bioflavonoids, chlorophyll, etc. Vegetables and fruits also contain a lot of water and are an important source of inorganic salts for the human body, which can help the body maintain an acid-base balance. Dietary fiber can promote human gastrointestinal peristalsis, clean the intestines and promote fecal excretion, and can also delay or reduce the absorption of carbohydrates and fats. Research shows that adults eating enough fruits and vegetables every day can not only prevent cancer, but also reduce cardiovascular disease. disease , gout, hypertension, arteriosclerosis, obesity, constipate risk of diseases.

　　★Vegetables, fruits and vitamins are more comprehensive, balanced and sufficient★

　　Vitamins are a complete system, all of which are indispensable； If you only supplement one or a few types of vitamins, you will be deficient in other vitamins. This is because natural vitamins do not work alone, but in combination with other vitamins and nutrients. Excessive or insufficient supplementation of one vitamin will affect and weaken the effects of other nutrients or vitamins.

　　Since chemically synthesized vitamins are separated from the nutrients of other vitamins, and the proportions of the ingredients in compound vitamin tablets are also different from natural ones, they cannot produce the same effects as vitamins contained in natural substances. And compared with natural vitamins, vitamin tablets are artificially synthesized and difficult to absorb.

　　★Do not take excessive amounts of vitamin tablets for a long time★

　　Vitamin tablets not only cannot replace fruits and vegetables, long-term overdose of vitamin tablets can also cause harm to the body and even cause poisoning. Frequent supplementation of large amounts of vitamin C will lead to an increase in oxalate and urate in the urine, which can easily lead to the formation of urinary tract stones. ； Moreover, vitamin C has certain irritation to the digestive tract. It will not only irritate the gastric mucosa, but also cause diarrhea。

　　When fat-soluble vitamins such as vitamin A and vitamin D are taken in too much, the excess vitamins cannot be excreted directly through urine like water-soluble vitamins, and can easily accumulate in the body and cause poisoning. If you take too much vitamin A, it can cause joint pain, skin Dryness, loss of appetite, hair loss , headache, drowsiness, blurred vision and other poisoning symptoms.

　　Excess vitamin D can cause calcification of soft tissues, damage the kidneys and cardiovascular system, cause symptoms such as loss of appetite, fatigue, constipation, weight loss and low fever, and even induce stones.