Ninety-year-old Maisie Grimwood will be living on barley sugars and cups of tea this weekend - and she's the first to admit it won't be easy.
But the Thames rest home resident has no hesitation in stopping her meals for the 40 Hour Famine because she knows the money raised will go to a good cause.
A rebel at heart, she hasn't sought her doctor's permission but says she is in pretty good health generally.
Vegetable soup will be the one food she will miss the most during the fast but she says she is determined not to let down her sponsors, including St James Church where she is a parishioner.
The former Raglan resident said she would carry out the challenge as cheerfully as she could.