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The Food Programme asks: Do we age better, if we eat better? Along with some of the latest findings from the Nutrition Society's meeting, a pioneering G.P.in Scotland - now 90 years old - gives his prescription for healthy living.

Sheila Dillon visits Dr Walter Yellowlees, in Aberfeldy, at the eastern end of Loch Tay in Perthshire. Author of A Doctor in the Wilderness, he was for decades a GP who tried his best to practise preventive medicine with his patients. Now over 90 years old, he leads an active full life and still tends his organic garden.

Sheila is joined in the studio by Professor Margaret Rayman of the Department of Nutrition at the University of Surrey who has just returned from the Nutrition Society鈥檚 meeting in Ulster and reports on the latest research regarding certain age-related conditions.

Reporter Kathleen Griffen talks to Dr Chris Parker at the Institute of Cancer Research/Royal Marsden Hospital on a thesis he is currently exploring, that prostate cancer may be amenable to dietary or food supplement therapy.