Kidney deficiency type hair loss is caused by kidney deficiency and a shortage of kidney essence, leading to hair loss. It can also be caused by excessive physical exhaustion, mental stress, and a deficiency of trace elements within the body. Diet adjustments can be made to address this, such as supplementing with collagen-rich foods including black sesame, black beans, wood ear mushrooms, and goji berries. It's important to maintain a pleasant mood, relax, eat less spicy and stimulating foods, ensure adequate sleep, avoid overexertion and staying up late, and refrain from smoking and drinking alcohol. Supplementing with vitamins is also beneficial.