Blood creatinine is slightly lower than normal value may be due to nutritional deficiency, low muscle content and disease. For patients with nutritional deficiency and low muscle content, they can pay attention to nutritional supplementation in daily life, strengthen exercise and regular review; for those caused by disease, they can be treated according to the specific cause of the disease. Creatinine is a common indicator of kidney function test, blood creatinine is the product of muscle metabolism in the body, so the level of creatinine is closely related to the muscle content, for example, men’s muscle content is more than women’s, so men’s creatinine value is often higher than women’s relative to be a little bit higher, and in addition with a variety of reasons. 1. own nutritional deficiency: there may be picky eaters, anorexia, etc., protein intake is reduced, causing low creatinine. At this time, it is necessary to adjust the dietary results, increase nutritional intake, and regular review. 2. Low muscle content: For example, thin women or the elderly, due to low muscle content, the test results may show low creatinine, at this time, we need to increase nutritional intake and moderate exercise to enhance muscle strength and improve the low creatinine situation. 3. Diseases: Certain diseases such as hypothyroidism, severe heart failure, severe infections, etc. may show low creatinine, which need to be treated according to the specific cause. In daily life, eat more meat food, maintain a healthy weight, pay attention to nutritional balance, often exercise, improve personal physical fitness, develop good living habits and eating habits, pay attention to rest, no smoking and alcohol. It is recommended that patients with low creatinine should go to regular hospitals in time and follow the doctor’s instructions for standardized treatment.