Here are suppliers we have carrying similar diet/ slimming products-Link hidden: Login to viewLink hidden: Login to viewLink hidden: Login to viewLink hidden: Login to view
To find specific products on their site, I recommend using the search function or browse through their categories.
The prices listed on the suppliers' websites are mostly in retail so contact them directly for their dropshipping price.
As you are probably well aware of, dropshipping is not the same as wholesale in terms of pricing and the profit margin you can have. Rather, it allows you to test a market without too much risk, and expand your product range without having to invest heavily in stock.