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Tropical rainforests around the world are disappearing.

What will we lose when they're gone?

This is the People's Pharmacy with Terry and Joe Graydon.

Thank you. Terry and Joe Graydon. Indigenous people have a wealth of knowledge about how to use rainforest plants for healing, but that important resource is disappearing as younger people in these areas grow up more interested in jobs and computers

than wandering around in the rainforest collecting plants.

Older people often find themselves unable to pass their encyclopedic knowledge on before they die.

Today we hear from an American woman who has spent years learning for Mayan healers how they use the native plants of Belize.

Coming up on the People's Pharmacy, Rosita Arvigo shares her remarkable story.

First, the News.

In the People's Pharmacy Health Headlines, blocking male hormones can help fight prostate cancer,

but may put men at higher risk for Alzheimer's disease. Half a million men with prostate cancer

are treated every year with drugs that block testosterone in similar hormones. Some men complain that

this approach, called androgen deprivation therapy or ADT,

saps their concentration, undermines their memory, and makes it more difficult to multitask.

Now a new study confirms an association between testosterone suppression

and the subsequent risk of Alzheimer's disease.

The scientists reviewed the records of 16,888 men who had prostate

...