A common symptom, not always explained

Why is my hair falling out while I'm losing weight?

Hair loss after significant weight loss has a name — telogen effluvium — and usually has an explanation. But persistent hair loss always deserves evaluation.

What it is

Telogen effluvium

It's diffuse hair shedding that usually appears about 2 to 4 months after a physiological stress event for the body — which can include rapid or significant weight loss. In most cases, it's temporary.4

Possible contributors

What can contribute to the hair loss

Rapid weight loss

Very fast weight loss is a known trigger for telogen effluvium.

Insufficient protein intake

Hair is made mostly of protein — prolonged low intake can affect the hair cycle.

Nutritional deficiency

Iron, zinc, and some B-complex vitamins have a known relationship with hair health.

Hormonal changes and other causes

Thyroid issues, emotional stress, and other clinical conditions can also cause or worsen hair loss — which is why evaluation shouldn't assume a single cause.

When to worry

Persistent hair loss needs medical evaluation

If hair loss persists beyond a few months, is very intense, or comes with other symptoms (extreme fatigue, weak nails, skin changes), it's worth investigating the cause with lab tests — instead of trying to fix it alone with products or supplements.

This content does not claim that your specific case of hair loss is caused by weight loss or medication — several causes are possible and need individual evaluation.

Book a medical evaluation