While there are distinct differences between WPCs and WPIs, there are also differences between different WPI products, and some whey protein isolate products are purer than others. With Ultra Iso Whey we donąt add any gums, binders, fillers, and thickeners to weigh the shake down or interfere with the absorption of the protein. We also donąt use any aspartame.Ingredients:Typical Amino Acid Profile: Alanine 4.6g, Arginine 2.1g, Aspartic Acid 9.8g, Cystine 2.3g, Glutamic Acid 11.2g, Glutamine** 4.3g, Glycine 1.7g, Histidine 1.8g, Isoleucine* 10g, Lysine* 8.3g, Methionine* 1.9g, Phenylalanine* 3.1g, Proline 5.1g, Serine 4.3g, Threonine* 5.9g, Tryptophan* 1.5g, Tyrosine 2.7g, Valine* 5.4g. Other Ingredients: Ultrafiltrated isolated whey protein (consisting of â-Lactoglobulin [â-Lg], á-Lactalbumin [á-Lac], Glycomarcropeptide [GMP], Bovine Serum Albumin [BSSuggested Use:Mix 1 rounded scoop with 6-8 oz. of cold water, take 1-3 servings per day.Product Facts:Serving Size (scoop) 1Servings Per 36Calories 88Total Fat (g) 0Riboflavin (mcg) 140Calcium (mg) 100Sodium (mg) 55Potassium (mg) 135Phosphorus (mg) 50Magnesium (mg) 18Proteins (g) 21Warnings:Note: Ingredients may vary depending on flavor. Keep out of reach of children.