Whey protein isolate and concentrate are two types of whey protein supplements that are both derived from cow's milk but differ in composition and manufacturing. Both are available in powder, capsule and liquid form. McKinley Health Center at the University of Illinois states that both types of whey protein are generally recognized as safe; however, it's always a good idea to consult your doctor before taking any type of supplement.
Isolate
The biggest advantage whey protein isolates offer over concentrates is the protein content. According to McKinley Health Center, isolates contain about 90 percent pure whey protein, which is higher than most concentrates. Whey protein isolates are lower in fat and lactose, so they may be a better choice for people watching their dietary cholesterol intake or who are lactose intolerant. The Whey Protein Institute calls whey protein isolate the purest and most concentrated type of whey protein on the market.
Concentrate
Whey protein concentrate is the most widely available type of whey protein. It is low in cholesterol and fat, although not quite as low as isolates; the exact fat/cholesterol content varies depending upon price and manufacturer. Concentrates contain anywhere from 29 percent to 89 percent protein content, according to McKinley Health Center. The lower the protein content, the higher the fat and lactose content will be in that particular whey.
Price
Whey isolates and concentrates also differ in pricing. Matt Weik of Bodybuilding.com says whey protein isolates tend to be a bit pricier than whey concentrates. This is primarily because of the increased protein content and purity. Weik suggests beginners start out by taking whey concentrate to see if whey protein is right for them.
Recommendation
Overall, whey protein isolate is a superior product in terms of purity and protein content. However, McKinley Health Center says whey protein concentrate with 80 percent protein or higher is nearly as effective as whey protein isolate, not to mention less inexpensive. The health center recommends choosing whey protein isolate or a concentrate with 80 percent or higher protein content.
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