Whey protein concentrate has been in gym bags for decades because it does the job at a fair price. It is less processed than isolate, usually tastes creamier, and works for most people who handle dairy well.
This guide covers what it is, what the research says it does, who should skip it and how to pick a good one.
Quick Answer: Is Whey Protein Concentrate Worth It?
Yes, if you tolerate dairy and want a complete protein at a lower price than isolate. A meta-analysis of 49 randomized trials found that protein supplements increase gains in strength and lean mass from resistance training. Concentrate is about 70 to 80% protein, with some lactose and fat left in. People with lactose intolerance or a milk allergy should choose whey isolate or plant protein instead.
What Is Whey Protein Concentrate?
Whey is the liquid left over when milk is turned into cheese. Concentrate is made by filtering that liquid and drying it, which leaves a powder that is typically 70 to 80% protein by weight. The rest is small amounts of lactose, fat and minerals. Whey contains all nine essential amino acids, which is why it counts as a complete protein.
Func Lab's Whey Protein Concentrate uses grass-fed whey concentrate with bromelain and papain digestive enzymes. Flavoured versions are sweetened with stevia and monk fruit and contain no gums. A flavoured scoop gives about 22 to 25 g of protein. For example, the Chocolate nutrition panel lists 25 g of protein, 138 kcal, 2.2 g of fat, 4.5 g of carbohydrate and 0 g of sugar per serving.
Benefits for Muscle and Recovery
The strongest evidence is for training. A meta-analysis of 49 randomized trials with 1,863 participants found that protein supplements increased strength, fat-free mass and muscle fibre size during resistance training. The effect was smaller with increasing age and larger in people with training experience. Beyond a total intake of about 1.6 g per kg of body weight a day, extra protein added no further gains in fat-free mass (Morton et al., British Journal of Sports Medicine, 2018).
Whey is rich in leucine, the amino acid that switches on muscle protein synthesis, and it digests quickly. The International Society of Sports Nutrition position stand recommends rapidly digested proteins with enough leucine, and suggests a dose of 0.25 g of high-quality protein per kg of body weight, or about 20 to 40 g, per meal (Jäger et al., Journal of the International Society of Sports Nutrition, 2017).
The powder works alongside training, not instead of it. Two to four resistance sessions a week, with enough total protein across the day, is what turns the extra protein into muscle.
Weight Management
Protein cannot burn fat by itself, but it helps protect muscle when you cut calories. The International Society of Sports Nutrition notes that higher intakes, in the range of 2.3 to 3.1 g per kg, may be needed to keep lean mass in resistance-trained people during low-calorie periods (Jäger et al., 2017). A scoop gives you 22 to 25 g of protein, and the Chocolate flavour is 138 kcal, so it is an easy way to raise protein without adding much to your daily intake. Our guide to protein to calorie ratio explains how to compare products on that measure.
Concentrate vs Isolate in Short
Isolate is filtered further, so it has more protein per scoop (29 to 30 g in Func Lab's whey isolate), less lactose and less fat. Concentrate costs less and gives a creamier shake. If you tolerate dairy and are not counting every gram of fat and carbohydrate, concentrate is a sensible default. For the full side-by-side, see whey isolate vs concentrate, and for a wider look at types, whey protein powder benefits and types.
Lactose and Who Should Avoid It
Concentrate keeps more lactose than isolate. The NIDDK notes that many people lose some ability to digest lactose after infancy, and that most people with lactose intolerance can handle a small amount (NIDDK). If you have mild sensitivity, start with one scoop and see how you feel.
Avoid whey concentrate if you have a milk protein allergy. If you have kidney disease or significant lactose intolerance, speak to a doctor first. Whey isolate has less lactose, and plant protein has none. Our plant protein vs whey guide compares them, and our whey protein side effects guide covers what to watch for.
How Much Protein You Need
The International Society of Sports Nutrition puts the daily target for most exercising people at 1.4 to 2.0 g per kg of body weight. For a 70 kg person at 1.6 g per kg, that is about 112 g a day. Two scoops of concentrate give roughly 44 to 50 g, around 40% of that target. The rest should come from food, since a powder is there to fill gaps. Our guide on how much protein you really need helps you set a number.
How to Use Whey Protein Concentrate
- Timing. Anytime works. Many people use it after training, at breakfast or between meals. The International Society of Sports Nutrition notes that the exact timing is mostly a matter of personal tolerance.
- Mixing. Func Lab's directions are one scoop in 300 to 350 ml of water or plant-based milk. For a creamier shake, use 250 to 300 ml of milk.
- Shaker. A shaker with a whisk ball helps prevent lumps. Our shaker bottle guide covers the options, and why a protein shake turns out gritty explains how to fix texture.
- In food. It works in oats, smoothies, pancakes and baked snacks. Our protein-packed breakfast guide has ideas.
- Travel. Single-serve sachets are handy for trips and for trying a flavour.
How to Choose a Good Whey Protein Concentrate
- Protein per serving. Look for around 20 to 25 g, with low added sugar.
- Ingredient list. Whey concentrate should come first, with no fillers or proprietary blends. Our label cheat sheet shows what to check.
- Batch testing. Look for independent lab reports matched to your batch number. Func Lab publishes protein and heavy metal results on its Certified page, and our heavy metals guide explains how to read them.
- Taste and mixability. A powder you stop using after three weeks does not help, so choose a flavour you enjoy.
Frequently Asked Questions
Is whey protein concentrate safe to take every day?
For healthy adults with normal kidney function, daily use that keeps your total protein within recommended ranges is generally considered safe. The International Society of Sports Nutrition puts the range for most exercising people at 1.4 to 2.0 g per kg of body weight a day. If you have kidney disease or a milk allergy, check with your doctor first.
Can I use whey protein concentrate if I do not go to the gym?
Yes. Protein powder is a convenient way to close a gap in your daily intake, and it does not require a training routine. The muscle-building benefit is largest when protein is paired with resistance training, so expect less visible change without it.
Should I take whey protein concentrate on rest days?
Yes, if you are using it to meet your daily protein target. The International Society of Sports Nutrition notes that the muscle-building effect of a training session lasts at least 24 hours, so protein on rest days still contributes to recovery.
Can whey protein concentrate help with weight loss?
It can help you keep lean mass while eating fewer calories, which is the main role of protein in a cut. It is not a fat-burning product, and weight loss still comes from a calorie deficit. A scoop is an easy way to reach your protein target without many extra calories.
What is the difference between unflavoured and flavoured whey concentrate?
Unflavoured has no added flavour or sweetener, so it suits coffee, oats, smoothies and cooking where you control the taste. Flavoured is ready to shake and easier to enjoy on its own. Func Lab's flavoured range is sweetened with stevia and monk fruit and has zero added sugar.
Will whey concentrate upset my stomach if I am not fully lactose intolerant?
It can. Concentrate keeps more lactose than isolate, so mild sensitivity can cause gas or bloating. Start with one scoop, and if symptoms continue, try whey isolate or plant protein. Our guide to protein bloating covers other causes.
Is whey concentrate or isolate better for me?
Neither is better in every case. Concentrate costs less and tastes creamier. Isolate has more protein per scoop and less lactose. Our full comparison, whey isolate vs concentrate, covers the numbers.
Can I take whey protein concentrate during pregnancy?
Ask your doctor or midwife first. Func Lab also recommends checking with your doctor before using any of its protein products during pregnancy.
The Bottom Line
Whey protein concentrate is an affordable, complete protein that supports muscle gain when you train and eat enough protein overall. It keeps more lactose than isolate, so it suits people who tolerate dairy.
Choose a product with a short ingredient list and batch-matched lab reports, mix it properly and use it consistently. If dairy gives you trouble, move to isolate or plant protein.
This article is for general information and is not medical advice.
