I'm often asked what my opinion about a diet or disease is.

Who cares what my or anyone else's opinion is?

Always you care about is what the science says.

What does the best available balance of evidence

published in the peer-reviewed medical literature

have to say right now?

Welcome to the Nutrition Facts Podcast.

I'm your host, Dr. Michael Greger.

Did you know that by age 50 about half of all men and women

will experience hair loss?

The majority of age-related hair loss is genetic,

but even identical twins can have dramatically different heads of hair

based on their diet and lifestyle.

In our first story, we look at whether

biotin or zinc supplements have any role in preventing hair loss.

Studies show that by age 50, approximately half

of men and women will experience hair loss.

No, it's not caused by washing your hair too much or brushing your hair too

little to the many myths out there.

The majority of hair loss with age is genetic for both women and men.

Based on twin studies, the heritability of baldness in men is 79%.

Meaning about 80% of the difference in hair loss between men is genetically determined.

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