Disadvantages of onion shampoo: long-term use will stimulate and be allergic to onions. It is recommended not to wash your hair with onions for a long time.
Extended data
The efficacy of onion
1. Prostaglandin A is a strong vasodilator, which can antagonize pressor substances such as catecholamine, promote sodium excretion and lower blood pressure.
2. Sulfide can promote fat metabolism, reduce blood lipid and resist arteriosclerosis;
3. Flavonoids contained in onion can reduce the viscosity of platelets. Eating onions regularly can prevent thrombosis and reduce the probability of myocardial infarction and cerebral thrombosis;
4. Onions contain organic substances similar to the hypoglycemic drug methanesulfonic acid, which can obviously reduce the blood sugar content;
5. It contains sulfide and trace element selenium, and has inhibitory effect on gastric cancer, esophageal cancer, colon cancer and breast cancer.
6. The volatile oil contained in onions can help the elderly, and eating onions regularly can improve the quality of sexual life;
7. Onions can improve the bone density of experimental mice, and eating onions often can prevent osteoporosis;
8. Onions are rich in vitamin C and nicotinic acid, which can promote the formation of interstitial cells, repair damaged cells, and make skin smooth, ruddy, elastic and have a cosmetic effect. Contains sulfur and vitamin E, which can prevent unsaturated fatty acids from producing lipofuscin pigment and prevent senile plaque.
Source: Baidu Encyclopedia: Onions