Hair loss caused by insufficient kidney qi is mostly due to poor digestion in the gastrointestinal tract, which means nutrients cannot keep up, leading to hair loss. To address kidney qi deficiency, you can consume foods like dates, brown sugar, adzuki beans, Chinese yam, and coix seed in your regular diet. These can effectively help replenish kidney qi and improve symptoms. Additionally, consuming more leeks, spring onions, or taking medication that supplements kidney qi can effectively treat the condition. It is also important to rest more, avoid frequent masturbation, and not engage in excessive sexual activity to avoid aggravating the condition. Most importantly, avoid staying up late.