Thinning hair or bald spots can occur due to normal aging, nutritional deficiency, hormonal dysfunction, immune conditions, and other causes.
There is plenty of research that shows a correlation between allergies and hair loss.
People who have food allergies have an increased predisposition to alopecia areata, an autoimmune condition characterized by patchy bald spots
The autoimmune disease alopecia areata may be triggered by food allergies. In this condition, the immune system attacks hair follicles, causing inflammation that results in round patches of hair loss on the scalp and body. A 2018 study published in Allergy and Asthma Proceedings found people with alopecia areata are at a three-fold higher-than-normal risk of having a food allergy.
In my opinion, in cases of Alopecia areata and other cases of unusual hair loss, especially at a young age, it is very important to check for environmental and food allergies and treat it as early as possible.
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