It depends. If you’re eating a balanced diet, you’re likely getting all the protein your body needs. Whole foods—nuts, seeds, eggs, low-fat dairy, legumes, and lean meats—offer protein along with fiber, vitamins, and other nutrients that a scoop of powder simply can’t match. Protein powders are not meal replacements.

That said, high-quality protein powder may be beneficial if you are recovering from surgery or an injury, have difficulty eating due to illness or aging, or need extra protein for wound healing. It’s also useful if you’re following a strict diet (like veganism) and aren’t getting enough protein through food alone. For athletes, protein powder can be a convenient way to refuel post-workout because the body absorbs liquid protein quickly. Unless you fall into one of these categories, you don’t need a protein powder.

When you’re looking at different protein sources, also keep in mind whether you’re getting a complete or incomplete protein. All of our picks are complete proteins, meaning that they provide all nine essential amino acids that the body doesn’t product itself.

Whey protein: Whey protein comes from milk during the cheese-making process, and it’s one of the most efficient ways to get protein into your system. It’s packed with essential amino acids, meaning your body can absorb and use it quickly—great for muscle recovery and growth. There are three whey subtypes, each with its own pros and cons.

• Whey protein concentrate: The least processed version, typically 70-80 percent protein, with the rest made up of carbohydrates, fats, and lactose. It retains beneficial compounds like immunoglobulins and lactoferrin, which may support immunity. It’s also the cheapest.
• Whey protein isolate: Most of the fat and lactose is filtered out, leaving a protein that’s about 90 percent protein and lower in carbohydrates. This is a solid choice if you want more protein per scoop or have a mild lactose intolerance.
• Whey protein hydrolysate: Whey protein hydrolysate is predigested using enzymes, making it the quickest to absorb. It’s often used in medical nutrition and by elite athletes who need rapid muscle recovery. It’s also the priciest.

Casein protein: Casein is the other major protein in milk. When consumed, it forms a gel in your stomach, meaning your body gets a slow, steady release of amino acids. This makes a great option for pre-bedtime protein or keeping hunger at bay between meals. There are two main subtypes:

• Micellar casein: The least processed, offering sustained protein release.
• Casein hydrolysate: Predigested for faster absorption, though still slower than whey.

Pea protein: This plant-based protein is made from ground yellow split peas and is high in essential amino acids, including BCAAs. It’s dairy-, gluten-, and soy-free, making it great for people with allergies. Technically, it’s a complete protein, but it’s lower in methionine, so some experts would argue it’s not as complete as whey.

Brown rice protein: Brown rice protein is high in fiber, easy to digest, and hypoallergenic, but it lacks some essential amino acids (specifically lysine), making it an incomplete protein. That’s why it’s often blended with pea protein for a more balanced amino acid profile. It’s gentle on the stomach and good for people with food sensitivities.

Beef protein isolate: Meat contains protein! Beef protein isolate is made from cow tissue that has been extracted and filtered into powder.

While high-protein diets have been studied extensively, the long-term effects of regularly consuming protein in powdered form remain unclear.

• If you’ve ever chugged a protein shake and immediately regretted it, you’re not alone. Dairy-based blends (whey and casein) can cause bloating, gas, and other gastrointestinal issues—especially for those with lactose intolerance or sensitivities. Plant-based protein powders aren’t always more digestible, as some contain sugar alcohols, gums, or thickeners that can also upset your stomach.
• Because it’s classified as a dietary supplement, the FDA doesn’t regulate protein powder the way it does food or medication. That means it’s up to manufacturers to evaluate their own products for safety, which leaves plenty of room for inconsistencies and contamination.
• A report from the Clean Label Project tested 160 powders for contaminants and found that many contained heavy metals like lead, arsenic, and cadmium, as well as BPA (a plastic additive) and pesticides. Organic powders showed three times more lead and twice as much cadmium compared to non-organic options. Plant-based powders averaged three times more lead than whey-based alternatives. And cocoa-containing powders contained four times more lead than vanilla. These toxins can creep into powders through contaminated soil (since many plant-based proteins come from crops) or manufacturing processes that introduce pollutants along the way.

Not all protein powders are contaminated, but it’s worth checking third-party testing results (like those published by Clean Label Project) before incorporating one into your diet.

Protein source: Whey, casein, soy, pea, brown rice, egg white—protein powder comes in many forms and caters to different needs (build muscle, weight loss, weight gain, post-workout recovery, etc.). Your choice depends on dietary preferences and your personal goals.

Protein content: If your goal is muscle growth, aim for 20 to 30 grams per scoop. Otherwise, match the amount of protein to your dietary or fitness needs.

Processing method: Concentrates are the least processed and have more nutrients. Isolates tend to have higher protein content and fewer carbs and fats, while hydrolysates digest the fastest.

Allergens and dietary preferences: Make sure your protein powder aligns with your diet. If you’re allergic to dairy, soy, gluten, or nuts, double-check labels as many powders sneak in allergens. If you’ve had digestive issues before, start with a small quantity to test your tolerance before going all in.

Additives and fillers: Watch for artificial sweeteners, gums, and thickening agents that can cause bloating and other gastrointestinal issues.

Flavors: Powders now come in every flavor from matcha to fruity cereal milk. Choose a flavor you’ll actually drink.

Brand reputation and certifications: Some brands are rigorous about quality control, third-party testing, and ingredient sourcing, and others aren’t. If you want peace of mind, look for certifications like Informed Sport and NSF Certified for Sport, which verify that the product contains what it advertises and is free of banned substances.

Cost: Compare cost per serving instead of just the upfront price.

Photograph: Boutayna Chokrane

I’ve been downing protein powders for years, but for this guide, I put each one through a fresh round of testing. Each powder was sampled at least three times to assess taste, texture, and mixability. I mixed them with water, milk, and non-dairy alternatives. I also baked them into muffins and blended into the occasional smoothie because not all of us like our protein straight.

I prioritized powders with minimal to no additives and full transparency in sourcing—no unnecessary fillers, gums, or questionable sweeteners. Solubility was a major consideration, too. I also scrutinized manufacturing practices and third-party testing. Certifications (like NSF Certified for Sport or Informed Choice) mattered. Every pick is also a complete protein, meaning it contains all nine essential amino acids.