Fitness gear keeps getting fancier, with smart watches, camera-equipped mirrors and apps that track every rep. But one of the most useful tools for many active people is still a simple tub of protein powder. It is also one of the easiest products to overpay for. Huge tubs with bold labels often hide less protein per scoop than you would expect. Here is how to choose one that is good value and good quality.
Do you actually need protein powder?
Not necessarily. Protein powder is a convenience food, not a requirement. If you get enough protein from meals, you do not need it. But it is useful if:
- You are trying to build muscle and struggle to eat enough protein.
- You are an older adult with a small appetite. See morning habits after 40.
- You are trying to gain weight. See supplements for healthy weight gain.
- You need a quick option after training or on busy mornings.
Most adults need at least 0.8 grams of protein per kilogram of body weight a day. Active people and those trying to build muscle often benefit from more, around 1.2 to 2.0 grams per kilogram. See our protein page.
Step 1: Compare protein per scoop, not scoops per tub
Look at the Supplement Facts or Nutrition Facts panel and find:
- Protein per serving, usually 20 to 30 grams.
- Serving size in grams. If a 40-gram scoop contains only 20 grams of protein, half the scoop is something else, such as carbs, sweeteners and thickeners.
- Servings per container.
Then work out the cost per gram of protein. A cheaper tub can easily be the more expensive choice. Our guide to cost per serving shows how.
Step 2: Choose the type
Whey
- Made from milk. Digests quickly and has a complete amino acid profile.
- Whey concentrate is cheaper and contains a little lactose.
- Whey isolate is more filtered, with less lactose and fat, and often works for people who are mildly lactose intolerant.
Casein
- Also from milk, but digests slowly. Some people use it before bed.
Plant proteins
- Pea, rice, soy, hemp and blends. Good for vegans and people who avoid dairy.
- Blends of pea and rice give a more complete amino acid profile.
- Soy is a complete protein on its own.
See whey vs plant protein for a detailed comparison.
Collagen
- Often sold as protein, but it is an incomplete protein and is not as effective for building muscle as whey or soy. See collagen supplements: what to know and collagen vs protein powder.
Step 3: Check for amino spiking
Some companies have been accused of adding cheap amino acids such as glycine or taurine to boost the protein number on the label. Look for products that list a full amino acid profile, and be suspicious if a cheap product claims unusually high protein.
Step 4: Look for third-party testing
Independent tests of protein powders have found heavy metals, such as lead, in some products, more often in plant-based ones. Testing programs such as NSF Certified for Sport and Informed Sport check for contaminants and banned substances. This is especially important for athletes who are drug tested. See what NSF Certified means and third-party testing.
Step 5: Read the other ingredients
Flavored powders often contain sweeteners, gums, flavors and sometimes added sugar. If you have a sensitive stomach, sugar alcohols and some gums can cause bloating. Unflavored powders are the simplest and can be mixed into smoothies, oats or yogurt.
Step 6: Avoid proprietary blends
A "protein matrix" or "blend" that does not show how much of each type is included may be mostly the cheapest ingredient. See proprietary blends explained.
Easy ways to use protein powder
- Blend with milk, a banana and peanut butter.
- Stir into oatmeal after cooking.
- Mix unflavored powder into pancake batter or yogurt.
- Shake with water or milk after a workout.
The bottom line
Choose protein powder by grams of protein per scoop and cost per gram of protein, not by tub size or label hype. Pick whey, casein or a plant blend based on your diet and stomach, look for third-party testing, and keep the ingredient list short. And remember that it is a convenience, not a necessity. Real food works too.