Weight Loss Sites Looking Good

There is a ton of weight loss sites on the Internet. From good quality ones like these weight loss centres, to the clowns who spam us every single day.
The difficult part is, like pharmaceuitical sites, telling the good from the bad.
Good to see Google starting to have a go by trying to identify paid links and devaluing those sites that buy and sell links.
Could be the start of a clean up.
Cheers
Brendon