The amount of whey protein is not important for appetite suppression

High protein diets are effective for weight control as they suppress appetite, reduce insulin secretion and lower post-meal blood glucose levels.

Australian scientists led by Amy Hutchinson of the Royal Adelaide Hospital showed that consuming a drink containing 30 or 70 grams of whey protein had no effect on energy intake, blood glucose, digestive hormones, insulin or glucagon (both hormones important for appetite control).

Consuming protein in small amounts throughout the day may be an effective way to modify appetite in people who want to lose weight on a calorie-restricted diet.

(American Journal Clinical Nutrition, 102: 1574 - 1584, 2015)