We are independent & ad-supported. We may earn a commission for purchases made through our links.

Advertiser Disclosure

Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.

How We Make Money

We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently from our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Is Whey Protein Powder?

By Holly Collins
Updated May 17, 2024
Our promise to you
WiseGEEK is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At WiseGEEK, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

Whey protein is the highest quality and most nutritious protein available. Comprised of approximately 80% casein and 20% whey proteins, it is sometimes called the “fast protein” because of its quick metabolic absorption and speed of nourishment delivery to muscles. Whey protein powder is highly soluble and efficiently absorbed by the body.

Valued by athletes and body builders, whey protein powder has the highest known biological value of any protein. Whey’s proportion of proteins that can be absorbed and incorporated into the proteins of the body is very high. Athletes and body builders use the powder as a diet supplement to help them train and compete at peak performance levels.

Whey protein powder is the best source of the natural branched chain amino acids; leucine, isoleucine, and valine that are so important to athletes. The branched chain amino acids are central to fighting fatigue and aiding in recovery during and after exercise. They are burned at higher levels by active bodies, thus requiring athletes and bodybuilders to consume more of them.

Proteins are made of essential and non essential amino acids. They serve to repair cells and control many metabolic functions. Proteins are the body’s source of energy and function to build and repair muscles and bones.

The human body organically manufactures non essential amino acids, but can only get essential amino acids from the consumption of high quality protein foods like whey protein powder. Whey protein is a naturally complete protein. This means it contains all of the essential amino acids.

Whey is a byproduct of cheese. After milk is processes into cheese, a liquid called milk plasma remains. Whey is extracted from milk plasma.

Whey protein powder comes in three forms; concentrate, isolates and hydrolysates. Isolates is whey’s purest form containing about 90% pure protein and virtually no lactose or fat. It is sometimes flavored and most commonly consumed by dissolving in milk or water to drink.

Whey protein can be an effective general health tool and aid in weight loss. Whey protein powder isolate’s combination of high protein content and lack of fat, make it attractive to those trying to lose weight. Whey protein also has high levels of glutathione, an antioxidant required for a healthy immune system. Because of this, whey protein powder can be very beneficial to those battling degenerative disease. Being a pure and complete protein, it is also thought to help regulate blood sugar levels benefiting the management of diabetes.

WiseGEEK is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Discussion Comments

By anon159094 — On Mar 10, 2011

Is whey protein vegetarian?

By anon111038 — On Sep 14, 2010

Whey protein is not gluten free.

I would not recommend a lactose intolerant person using any whey or soy protein powders. Not only is there still some amount of casein (dairy protein) left in the powder but milk sugars, too (lactose)

Hemp based proteins are a much better option for a "protein powder". Hemp is a great source of bio-available protein and adequate amounts of Omega 3 and 6 and it actually aids in digestion where as most people have some bloating or other digestion problems with whey based proteins.

Nutiva or Navitas are great brands to try!

By anon68975 — On Mar 05, 2010

Is whey protein gluten free?

By anon27810 — On Mar 05, 2009

Can lactose intolerant people use whey powder?

WiseGEEK, in your inbox

Our latest articles, guides, and more, delivered daily.

WiseGEEK, in your inbox

Our latest articles, guides, and more, delivered daily.