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Protein powders are a popular supplement among health-conscious people, including athletes, bodybuilders, and such. They supply protein, including the essential amino acids your body can’t make, though most people can get enough protein from food alone.[1] With so many organic powders on the market, it helps to know how the main types differ. Read on for six common protein powders, who each one suits, and what to check on the label.
Disclaimer: This article is for general information and is not medical advice. Talk to your doctor or pharmacist before starting a supplement, especially if you are pregnant, nursing, take medicines or are buying for a child.

Supplement safety
- Supplements aren’t FDA-approved before sale; look for a third-party seal such as USP Verified, NSF (including NSF Certified for Sport) or Informed Choice.[2][1]
- In 2025 tests of 23 protein powders and shakes, Consumer Reports found more lead than its daily level of concern in a single serving of most products, with plant-based powders highest on average. Organic doesn’t rule this out, so don’t rely on several servings a day.[3]
- Whey and casein are milk proteins. Anyone with a milk allergy must avoid them.[4]
- Ask your doctor before use if you take medicines, are pregnant or have a health condition.[1]
Table of Contents
Types of Protein Powders

Here are the types of protein powders:
1. Casein Protein
2. Whey Protein
3. Pea Protein
4. Egg Protein
5. Hemp Protein
6. Brown Rice Protein
1. Casein Protein
2. Whey Protein
3. Pea Protein
4. Egg Protein
5. Hemp Protein
6. Brown Rice Protein
- Casein Protein – Casein is a milk-based protein. It belongs to a family of phosphoproteins commonly found in mammalian milk. About 80 percent of the protein in cow’s milk is casein.[4] It’s separated from milk by curdling it, and it forms curds in the stomach too, so it’s digested more slowly than whey. That’s why some people take it before bed. Because it’s a milk protein, it isn’t safe for anyone with a milk allergy.[4]
- Whey Protein – Whey protein is derived from milk, like casein. In the cheesemaking process, when the milk is curdled, the liquid left behind is called whey. Whey contains lactose (milk sugar), so it can bother people who are lactose intolerant.[5] Whey protein isolate is processed to remove most of the lactose, so some people with lactose intolerance tolerate it, but it isn’t lactose-free and it isn’t a milk substitute. Whey is a milk protein, so anyone with a milk allergy must avoid it completely, isolate included.[4] For organic picks, see our organic whey protein guide.
- Pea Protein – Pea protein powder is made by extracting protein content from yellow peas. It’s a good-quality plant protein. Pea protein contains all the nine essential amino acids that are not manufactured by the body. However, the amount of Methionine in pea protein is comparatively low, although it can be compensated by including other methionine-rich sources in your diet. Eggs, fish, poultry, meat and rice protein all add methionine, which is why pea and rice protein are often blended. Some people find pea protein causes gas or bloating.
- Egg Protein – Eggs are an excellent source of protein. Egg Protein powders are typically made from egg whites instead of whole eggs. Eggs, like all other animal protein sources, are a complete protein source, containing all the nine essential amino acids required for growth and development that are not synthesized by the body itself. Egg white powder is a dairy-free animal protein, but it isn’t suitable for anyone with an egg allergy. Because it leaves out the yolk, it has less fat than whole eggs.
- Hemp Protein – Hemp protein is made by pressing the oil from hemp seeds and grinding what’s left into powder. Hemp seeds don’t naturally contain THC; food-grade hemp seed protein has only trace amounts picked up during harvest, not enough to cause a high. The FDA has reviewed hemp seed protein powder as a safe food ingredient.[6] It comes with a nutty, earthy taste and is a high-quality, vegan protein source. Hemp protein contains all nine essential amino acids plus some fat and fiber, but it’s low in lysine and is only about half protein by weight, less than pea or soy protein isolates.
- Brown Rice Protein – Although not the best protein source, brown rice protein has been in use for a while now. However, it can be a suitable option for people preferring natural ingredients or follow a plant-based diet. It is derived from brown rice and made into a refined powder. Brown rice protein contains all nine essential amino acids but is low in lysine, so it’s often blended with pea protein, which is higher in lysine. As with other plant proteins, choose a brand that publishes heavy-metal testing.[3]
What the Research Says
The FDA doesn’t approve supplements for safety or effectiveness before they’re sold, and supplement quality varies.[2] Most people can meet their nutrient needs from food.[1] Be wary of ads that promise fast or dramatic results.[7]Sources
- NIH Office of Dietary Supplements. Dietary Supplements: What You Need to Know. Accessed October 16, 2026.
- U.S. Food and Drug Administration. Dietary Supplements. Accessed October 16, 2026.
- Martineau P. Consumer Reports. High Levels of Lead in Protein Powder and Shakes (Oct 2025, updated Jan 2026). Accessed October 18, 2026.
- American College of Allergy, Asthma and Immunology. Milk & Dairy Allergy. Accessed October 18, 2026.
- National Institute of Diabetes and Digestive and Kidney Diseases. Eating, Diet, & Nutrition for Lactose Intolerance. Accessed October 18, 2026.
- U.S. Food and Drug Administration. FDA Regulation of Cannabis and Cannabis-Derived Products (Q12, hemp seed ingredients). Accessed October 18, 2026.
- Federal Trade Commission. Health Products Compliance Guidance. Accessed October 16, 2026.
Update History
- Oct 2026: Corrected the claim that whey protein is a milk substitute for lactose-intolerant people (whey is a milk protein; isolate is low in lactose, not lactose-free; avoid with milk allergy); restored the missing hemp heading and clarified THC; removed unsupported claims about pea digestibility, egg leucine and brown rice muscle gains; added a lead-testing note and third-party seals; Sources (FDA, NIH ODS, FTC, Consumer Reports, ACAAI, NIDDK)
- Mar 2021: First published