My nutritionist recommended Medifast during the full liquid phase. The ready to drink ones aren't too terrible but the powdered ones are pretty gritty and disgusting! Is there a better one out there for long term use?

Muscle Milk, Syntha 6, Myoplex, and Labrada RTD are good. If you have a Vitamin Shoppe/Vitamin World near you you can often buy singles of ready-made protein shakes to try before you waste money on a big amount.

I like the Jillian Michael's Kind @ wal-mart (Chocolate) 4 pack is around 6 dollars. They have 16 grams of protein around 170 calories. I've tried several, these are my favortie.

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