Slimfast has one of the highest, if not THE highest, failure rates of all diet products.
I'd be very careful about the site that this info came from, though. The few reviews of diets may be a good way to get traffic. However, the purpose of the website is to sell a lot of diet supplements and their information on them is far from accurate. Most of the items they list have been proven in extensive research NOT to help in weight loss, and many can be harmful if taken by people with pre-existing medical conditions.
Hollie, I make soy protein smoothies every morning. I use a good handful of partially thawed frozen strawberries, a small banana, about a half cup of nonfat sugarfree vanilla yogurt, and enough skim milk to make it the right consistency. I also add a scoop of pure soy protein powder (unflavored, no additional ingredients).
I don't get enough protein from my normal diet, so this helps round things out. My choice of soy protein is mainly due to the recommendations by the FDA and the American Heart Association. I make my own shakes instead of buying the odd mixtures on the market because I like to be in control of what I put in my body, lol. There are so many products on the market these days that are overloaded with unnecessary or potentially dangerous ingredients
