Hair Loss falls under the Skin, Hair, & Nails category.

Evidence-based

Hair Loss

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•Last Updated: November 20, 2025

Hair loss can affect the scalp or other areas of the body where hair grows and may occur gradually or suddenly and dramatically. It may result from aging, genetics, hormonal changes, or medical conditions.

Written by:

Fact-checked by:

Last Updated:November 20, 2025

Research Snapshot

37 references on this page

354 participants in 4 trials

Examine Evidence Grades

C2 outcomes

D2 outcomes

Overview

What is hair loss?

What are the main signs and symptoms of hair loss?

How is hair loss diagnosed?

What are some of the main medical treatments for hair loss?

Have any supplements been studied for hair loss?

How could diet affect hair loss?

Are there any other treatments for hair loss?

What causes hair loss?

Examine Database: Hair Loss

Intervention	Health Outcome	Evidence
Probiotics	2 outcomes	2 Studies
Saw Palmetto	1 outcome	1 Study
Vitamin E	1 outcome	1 Study

Probiotics

2 outcomes

Saw Palmetto

1 outcome

Vitamin E

1 outcome

Hair Loss

Overview

What is hair loss?

What are the main signs and symptoms of hair loss?

How is hair loss diagnosed?

What are some of the main medical treatments for hair loss?

Have any supplements been studied for hair loss?

How could diet affect hair loss?

Are there any other treatments for hair loss?

What causes hair loss?

Examine Database: Hair Loss

Research FeedRead all studies

Frequently Asked Questions

Is biotin beneficial for hair growth?

Is male-pattern baldness inherited from the mother’s side?

Does testosterone cause baldness in men?

Does creatine cause hair loss?

References

Examine Database References