The medication itself usually does not directly damage hair follicles.
Instead, the problem comes from rapid metabolic change.
Here are the main reasons hair shedding happens.
1. Rapid Calorie Reduction
GLP-1 medications suppress appetite.
When calories drop too quickly, the body shifts resources away from hair growth.
Hair is considered non-essential tissue, so follicles temporarily shut down.
2. Nutrient Deficiencies
When people eat less, they often become low in:
Protein
Iron
Zinc
Biotin
B-vitamins
Hair follicles require constant nutrition to stay in the growth phase.
3. Physiological Stress
Rapid weight loss is a stress signal to the body.
Stress hormones can push hair follicles into the shedding phase (telogen phase).
4. Hormonal Adjustment
Weight loss and metabolic changes can temporarily alter:
Estrogen
Thyroid hormones
Insulin Regulation
These hormonal shifts can impact hair growth cycles.
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