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A kind of protein powder · also called whey powder, whey protein isolate, whey protein concentrate

7 views: its portrait, and how it looks in the comparison photos.
About
Whey protein powder is an airy nutritional supplement, packing about 3.7 ounces (106 grams) into one US cup.
Whey protein powder has a bulk density of about 28 pounds per cubic foot (0.45 grams per milliliter), which makes it relatively light and fluffy. A common 2-pound (0.9-kilogram) tub takes up roughly 8.6 US cups (2 liters) of volume. It is roughly half as dense as granulated sugar and noticeably lighter than all-purpose flour. Because air readily gets trapped between the fine dry particles, tapping or settling can change how much fits in a cup.
From Wikipedia
Whey protein is a mixture of proteins isolated from whey, the liquid material created as a by-product of cheese production. The proteins consist of α-lactalbumin, β-lactoglobulin, serum albumin and immunoglobulins.
Read more on Wikipedia →Text from Wikipedia’s “Whey protein” article, CC BY-SA 4.0.
6 on the site
One cup weighs
3.76 oz (106 g)
Quick answer
One US cup of whey protein powder weighs about 3.7 ounces (106 grams). This makes a level cup much lighter than the same volume of table sugar or flour.
Typical figures, the same ones every comparison on the site uses; real ones vary.
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