hi Carolyn,

Plain whey powder is very high in carbs; higher than skim milk powder even, since it has most of the lactose leftover from the cheese- or butter-making process. Which is where whey comes from

Plain whey powder is approx. 75% carbs by weight, which translates into 54g per ½ cup (dry). Ordinary skim milk powder is 52% carbs by weight, which is approx. 18g per ½ cup (dry).

Plain whey powder improves the texture of baked goods, muffins etc, but it's not really a nutritional booster, especially if what you want is more protein ... whey powder only has 9g protein per ½ cup, as opposed to skim milk powder, which has 12.5g per ½ cup.

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The whey protein isolate powders are expensive because they're purified and filtered ... nearly all of the lactose carbs are removed, and the end-product is 90% protein or higher. Plain whey powder is only 12% protein.

If you can afford the carbs, you might consider using skim milk powder and the more expensive whey protein isolate in a 50:50 mix for your muffins. They will still be whey lower in carbs , less lactose and more protein for your $$$.

Doreen