Yes, the supplements are a big thing. This is a low carb, high protein weight loss plan and the HNS (High Nutrition Supplements) are key. They supplement the extra protein you need to help lose the weight. I didn't believe it until I maxed out on the number of supplements I drink a day and then the weight started falling off. I have a 20 oz. Rubbermaid bottle and carry it and the drink packets in my purse. When I'm out and about, I may stop at a store for a bottle of water if I don't have any and mix it up while on the go. Other tricks that work is to get a pitcher and mix up all the drinks for your day and make sure you get it all in before the day is over. Also, you can use more water to make it more palatable. It doesn't change the protein content.
I hope this helps some and just remember, you are only permitted up to 3 bars a week. MANY of us who have been with MRC for a while have found they will make you constipated so we don't eat that many of them (even if they taste good). Fun, huh?