CAN what you eat for breakfast really affect how long you live? If you want to shave years off your 'biological age', futurist Ray Kurzwell suggests stocking up on this lot...

What did you have for breakfast today - slice of toast, bowl of cereal? Maybe you went whole hog with a juicy fry-up - but, if that was the case, you might want to rethink your morning meal of choice, especially if you're concerned about safeguarding your future health.

Google's top futurist Ray Kurzweil, who's 67, says his 'biological age' is in the 40s. Why? Because he lives such a healthy life, apparently, including a surprisingly calorie-laden but grease-free breakfast.

He believes his diet, which also includes several thousands of dollars worth of supplements, will help him live forever.

The key to his breakfast, he told The Financial Times, is "healthy carbs" such as porridge, that "fill you up with fewer calories". Here's what he eats in the morning...

BERRIES (85 calories for a cup)

Red berries, especially blueberries, are a good source of vitamin K. They also contain vitamin C, fibre, manganese and other antioxidants (notably anthocyanins). A 2012 study found that women who ate three or more portions of blueberries and strawberries a week had a 32% lower risk of a heart attack, compared with those who ate berries once a month or less.

DARK CHOCOLATE INFUSED WITH ESPRESSO (170 calories for an ounce)

Alison Hornby, a dietitian and British Dietetic Association spokesperson, told the NHS: "A range of health benefits from the consumption of cocoa products have been investigated, particularly in relation to cardiovascular disease, with early results showing promise. However, the potential health benefit of some compounds in chocolate have to be weighed against the fact that to make chocolate, cocoa is combined with sugar and fat."

SMOKED SALMON AND MACKEREL (100 calories for a 3oz serving)

The Government recommends we eat at least two portions of fish a week, one of which should be oily, such as salmon, mackerel or sardines.

Hornby says: "The benefits of fish include keeping your blood pressure at a healthy level and improving blood lipids, both of which reduce your risk of cardiovascular disease: the biggest killer in the UK."

VANILLA SOY MILK (100 calories for a cup)

Soy or soya 'milk' is a good source of protein, and low in fat. BBC Good Food says: "Soy-based foods can help to manage cholesterol levels, although you need about 25g soy protein, or three to four glasses of soya milk a day, to achieve this. Some brands are fortified with calcium and vitamins A and D." It's best to get ones with no added sugar.

STEVIA (zero calories)

Billed as a natural sweetener, Stevia uses purified extracts from the leaves of the stevia plant, called steviol glycosides, which are 200 to 300 times sweeter than sugar - as well as being calorie-free, according to the NHS.

PORRIDGE (150 to 350 calories for half a cup, depending on ingredients and cooking method)

A bowl of porridge oats contains enough beta glucan to help lower cholesterol, as part of a balanced diet and healthy lifestyle. They're 100% wholegrain, a source of fibre, naturally low in saturated fat and salt and contain thiamin, vitamin B6, folate, iron, magnesium and zinc, all crucial for supporting normal body function.

GREEN TEA (zero calories)

Billed as a superfood, the antioxidant catechin in green (and black) tea has been found to help lower cholesterol and blood pressure.