Insufficient oxygen supply to the brain is generally considered to be due to lack of oxygen to the brain cells caused by ischemia after ischemia of the brain. Generally, ischemia of the brain can be seen in cerebral arteriosclerosis, narrowing of cerebral blood vessels, or metabolic encephalopathy and carbon monoxide poisoning and other encephalopathies can lead to insufficient oxygen supply to the brain. In this case, the patient can be given oral drugs to improve the cerebral blood circulation, which are commonly used in the clinic, such as ginkgo biloba preparation, ginkgo ketone ester drops, ginkgo ketone ester dispersible tablets, ginkgo biloba extract tablets, and so on. Improve brain metabolism to promote the recovery of brain cell function of drugs, such as cytarabine tablets, olanzapine, cerebral protein hydrolysate tablets and so on. For insufficient oxygen supply to the brain, if you want to eat diet, first of all, we suggest that the patient should be low-salt, low-fat diet, eat more nuts, walnuts and other foods because they can increase the unsaturated fatty acids, eat more vegetables and fruits can antioxidant anti-vascular atherosclerosis, and if necessary, you can also orally some of the antiplatelet aggregation of medicines, such as aspirin or poliovir, and so on.