Powdered milk or dried milk is a manufactured dairy product made by evaporating milk to dryness. One purpose of drying milk is to preserve it; milk powder has a far longer shelf life than liquid milk and does not need to be refrigerated, due to its low moisture content. Another purpose is to reduce its bulk for economy of transportation. Powdered milk and dairy products include such items as dry whole milk, nonfat (skimmed) dry milk, dry buttermilk, dry whey products and dry dairy blends. 
This powder is a food grade quality milk powder which is packed with vitamins.
This buttermilk powder is extremely high in lactic acid and can be added to many cosmetic products, eg, soaps, bath bombs, bath salts, bubble bars etc.
Buttermilk is beautifully moisturising and really soothing to the skin. It is suitable for all skin types.
To reconstitute use 1 part powder to 4 parts hot water.