Before the charity event at the store in Gardner Road, Maidenhead, on Friday, Marc Allnut had not been clean shaven since he was 14.
The 24-year-old, who lives in Strande Park in Cookham, said he wanted to raise money to 'support the local lad' who is the same age as him.
Marc said: "I keep going to stroke my beard. It feels strange without it."
He has raised more than £800 with a target of £1,000.
Matt's Fund was set up to raise £150,000 to send young father Matt Rackley to America for a state-of-the-art cancer treatment which is not available on the NHS.
Matt, who has a one-year-old son Freddie with his partner Hollie, was diagnosed with a brain tumour in April 2012.