What is the situation with a baby's yellow hair?

Patient's question:

Onset time: Laboratory test results: Previous treatment history and effectiveness: What is causing the yellow hair of an 18-month-old child? What kind of assistance is desired: Want to know what is lacking

Doctor's answer:

There are multiple reasons for yellow hair, including different races, intergenerational inheritance, and the content of trace elements such as iron, lead, zinc, cobalt, copper, platinum, and nickel in the hair. Additionally, the amount of melanin in hair cells and certain medical conditions (e.g., phenylketonuria, kidney disease) can also contribute. Therefore, hair turning yellow is related to nutrition and health.
Recommendation: If the disease has been ruled out, excessive consumption of sugar, fat, and acidic substances in the diet can cause hair to turn yellow, as well as a lack of certain trace elements (e.g., iron, copper, zinc). A deficiency in copper can reduce the function of tyrosinase, interfering with the metabolism of melanin. A lack of iron and zinc can disrupt the growth and development of hair cells, leading to yellow hair.