Keira Marlow, 21 and from Brecon, had anorexia for four years.
She had to travel to England for treatment, and said: "it is quite hard to be so far away from home, and the travelling back and forth all the time is a lot to take on as well as trying to recover."
"If [a specialist unit] was actually built in Wales, it would be much easier for Welsh sufferers."
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Stars of Team GB at this years' Olympics were in Wales today, as part of ITV's I Am Team GB campaign.
As Wales gets involved in the country's biggest sports day - Our Olympians have been getting in on the action.
ITV switched off all of its channels for an hour on Saturday as part of a national sports day event.