Novel methods for producing whey protein concentrates with favorable properties are provided. The methods include using chitosan selective precipitation whey pre-treatment, and microfiltration using polymeric membranes. The products obtained using these methods include WPC80 with low fat content, high clarity, low browning potential during storage, and having low levels of volatiles. Compositions and foaming agents obtained using the methods of the present invention are also provided.

Provided are a composition including coumestrol extracted from soybeans as an active ingredient, and a method of inhibiting cortisone reductase by applying it to skin of a subject.