Loma Linda, California is the long-awaited American Blue Zone... or is it? Not only does it turn out to be not so 'blue' (we don't see a single centenarian), but it's not even really a 'zone' - at least in a geographical sense.

In this third episode of Blue Zones: Revisited, we discover just how much the definition of a 'blue zone' had to be stretched in order to find one in the US, uncover some conflicting advice about meat, wine, and spirituality, and take a little excursion filled with yoghurt enemas... and even more disturbingly... eugenics.

The Californian Blue Zone

Financial advice from Loma Linda residents

The long-term effects of depression

Worldwide meat consumption

The effects of a vegan diet

The Adventist Health Study

Drinking red wine for your heart?

Foods containing resveratrol

How to Live Forever documentary