A milkshake containing a mix of nutrients needed to build new connections in the brain will go on sale today.
Said to reduce the symptoms of early Alzheimer's, Souvenaid costs £3.49 per 125 ml bottle.
Makers Nutricia claim that the once-a-day product has been clinically shown to improve memory in mildly affected patients.
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Mr Blavatnik, whose empire includes the Warner Music Group, has an estimated fortune of £13.17bn according to the Sunday Times Rich List.
Find out what to expect from the weather if you are running in the big race in London or watching from the sidelines.
It will be a soggy start to the weekend and temperatures will drop making it feel colder than in recent days.