1, eat more foods with high iodine content: people with gray hair should eat more foods with high iodine content, such as kelp, laver, milk and eggs. It can supplement nutrition for the brain and is also very helpful for blackening hair.

2, eat more black food: Chinese medicine believes that people with kidney function problems are prone to white hair, black into the kidney, so want to make white hair black, usually you can eat some black food such as black beans, black sesame seeds and black rice to tonify the kidney, which also helps to blacken white hair.

3, eat more walnuts: walnuts also have the effect of blackening hair, it contains a variety of vitamins, which can improve the activity of the skin. Eating walnuts regularly can not only make beauty beauty, but also make white hair black. Women who love beauty can eat two or three walnuts every day.

Health care methods to prevent gray hair;

1, Go to bed early and get up early: Pay attention to good sleep habits, which will help to relax and reduce stress. Sleeping for 8 hours every day can make you full of energy and reduce the generation of white hair.

2, local massage: you can often massage the scalp or comb your hair with a comb, but also play a role in promoting local blood circulation, which can prevent white hair.

3. Proper exercise: Exercise can speed up blood flow and make the whole body run smoothly. Good blood circulation is one of the important ways to prevent white hair, so you can exercise regularly, such as jogging, skipping rope and swimming.

Refer to the above? Baidu encyclopedia-white hair