South Beach Diet - Protein Powder

I have a protein power...ingredients...Soy Protein, Whey Protein concentrate, natural flavor, silicon dioxide. Caloried from fat 9,..20 calories in 1 TBSP
Is this okay on phase 1? I was thinking of adding 2 or more T. to a cup of milk with ice, vanilla or choco. extract, and blending. Thanks

How many g.'s of sugar?

There are 0 grams of sugar in this powder.

I guess it would be ok to use for a snack, but I wouldn't replace a meal with it.