First, it's an extreme diet called "Calorie Restriction" where wheat, sugar, dairy, meat and even tap water are banned! Devotees eat rations of steamed vegetables, fish and nuts; and claim it will help them live to 120 years old. Critics however worry about the safety of this diet and say it can also lead to starvation and malnutrition:

Devotees claim that by gaining the optimum nutrients from the fewest amount of calories, not only will you live longer and your body age at a slower rate, but you will be far less prone to disease such as heart attacks, diabetes, stroke and cancer — the main killers in the U.K.

Some of the converted claim it could help humans live to as old as 140. Followers of Calorie Restriction claim to number in the millions in America, some of whom have been following the plan for the past 20 years.

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Next, new hope for Alzheimer's sufferers: German researchers recently identified a memory "switch" in the brain. The switch gets turned off by ageing and illness; causing memories to fade. But now, powerful drugs may be able to turn the switch back on:

Triggering the switch in mice led to elderly creatures regaining the memory power of their youth, the journal Science reports. The researchers are confident that a similar switch exists in the human brain — and say that drugs that capitalize on their discovery could be in use in ten years.

The drug used on the mice, Vorinostat, is already used to treat a rare blood cancer but is too destructive for use in the human brain.

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Scientists at the University of Michigan believe broccoli could help stop breast cancer from spreading. The green veggie contains a chemical called "sulforaphane," which seems to target and kill off cancer stem cells:

Study author Professor Duxin Sun said: 'Sulforaphane has been studied previously for its effects on cancer, but this study shows that its benefit is in inhibiting the breast cancer stem cells.

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