What is the Best Protein Powder for You? Whey, Isolate, Pea & Fava Bean Compared
The best protein powder depends on whether you tolerate dairy, your budget, and how much protein you actually need per serve. In this blog, we'll help you find the perfect match so that you can shop with confidence.
Quick Answer: Which Protein Powder Should You Choose?
Whey Protein Isolate is best for lactose-sensitive people and tested athletes. Whey Protein is the best everyday value for anyone without dairy sensitivity. Pea Protein is the top dairy-free pick — a 12-week clinical trial found it builds muscle and strength as well as whey.[2] Fava Bean Protein is dairy-free with the smoothest, creamiest mix of the four.
Four factors decide which is right for you: dairy tolerance, protein needed per serve, budget, and how much texture matters.
The 4 Protein Powders at a Glance
| Whey Protein Isolate | Whey Protein | Pea Protein | Fava Bean Protein | |
|---|---|---|---|---|
| Protein per serve | 29g | 23g | 23g | 17.2g |
| Serving size | 33.3g | 30g | 30g | 30g |
| BCAAs per serve | 7g | 5.2g | 4.1g | 3.2g |
| Sugar per serve | 0.4g | 1.5g | Low | Not specified |
| Price per serve | $3.33 | $2.05 | $1.15 | $1.50 |
| Dairy-free | No | No | Yes | Yes |
| Gluten-free | Yes | Yes | Yes | Yes |
| Best for | Fastest absorption, tested athletes, lowest lactose | Everyday value, general muscle and recovery goals | Budget-friendly vegan option, highest plant protein per serve | Vegan option with a smoother, creamier mix |
Figures reflect Clean Nutrition's protein powder range at time of writing — check the product page for the latest numbers.
Whey Protein Isolate: The Purest, Fastest Option
Whey Protein Isolate is extra-filtered to strip out most of the carbohydrate, fat and lactose that whey concentrate keeps, leaving 29g of protein and 7g of BCAAs per 33.3g serve. The extra filtration step means that whey isolate suits lactose-sensitive people who still want dairy protein.
Whey Protein Isolate has the most protein per serve, and every batch is HASTA tested for banned substances.
Whey is naturally high in leucine, the amino acid most closely linked to muscle protein synthesis.[1] Isolate doesn't build muscle faster than concentrate gram-for-gram, so the main difference comes in purity and a cleaner macro profile (0.5g fat, 0.4g sugar).
Good for: lactose-sensitive people, tested athletes, and anyone chasing the leanest macros.
Shop Clean Nutrition Whey Protein Isolate.
Whey Protein: The Everyday Option
Clean Nutrition's standard Whey Protein delivers 23g of protein per 30g serve, around 120 calories and 5.2g of BCAAs, made from NZ grass-fed whey, the same fast-digesting, leucine-rich source as the isolate, minus the extra filtration.
For most people training regularly, standard whey does everything isolate does for recovery and growth, since the leucine and fast digestion that make whey effective aren't unique to isolate.[1] It costs about a third less per serve. The trade-off is a touch more lactose and fat.
Good for: anyone without dairy sensitivity who wants a cost-effective, everyday protein.
Shop Clean Nutrition Whey Protein
Pea Protein: The Budget-Friendly Vegan Option
Pea Protein is made from golden peas. Clean Nutrition's version delivers 23g of protein per 30g serve, matching whey gram-for-gram. It's dairy-free, gluten-free and soy-free.
A 2019 study gave participants either pea protein or whey protein during an 8-week high intensity training block, and found that pea protein produced similar outcomes to whey protein for muscle thickness, strength, power, and body composition.[3] This makes it an effective plant-based protein option.
Good for: vegans, anyone avoiding dairy, and budget-conscious buyers who want research-backed muscle-building results.
Shop Clean Nutrition Pea Protein
Fava Bean Protein: The Smoother Plant-Based Option
Fava Bean Protein is Clean Nutrition's newer plant option — 17.2g of protein per 30g serve, 100 calories and 3.2g of BCAAs, with all nine essential amino acids present. Like pea protein, it's vegan, dairy-free and gluten-free.
The main draw over pea protein is texture: fava bean mixes into a smoother, creamier shake, without the slightly gritty mouthfeel some plant proteins have often described as "Mixes really well and tastes magnificent" and "The best texture non dairy protein powder I’ve had."
Good for: anyone who wants a vegan protein with better mixability, or trying plant protein for the first time.
Shop Clean Nutrition Fava Bean
Whey vs Plant Protein: Does It Matter for Muscle Growth?
The research says the gap between whey and pea protein is smaller than most people assume. In the 12-week trial above, both groups built comparable strength and muscle thickness, well ahead of placebo.[2] The idea that plant protein "doesn't work" for training isn't well supported once you're eating enough protein overall.
How to Choose the Right One for You
- Dairy-free or avoiding dairy? Pea for the highest protein-per-serve and lowest price, Fava Bean if mixability matters more than an extra 6g of protein.
- Mildly lactose-sensitive but happy with dairy? Whey Protein Isolate — filtration removes most of the lactose that causes issues.
- No dairy sensitivity, want the best value? Whey Protein — the same muscle-building protein as isolate, at a lower cost per serve.
- Competing under an anti-doping code? Whey Protein Isolate — the only one of the four that's HASTA batch-tested.
They're all filler-free and gluten-free — it's just a matter of matching the details to you.
FAQ
What's the actual difference between whey protein and whey protein isolate?
Both come from the same NZ grass-fed dairy and are equally effective for recovery. Isolate is extra-filtered to strip out more fat, carbs and lactose, and has a slightly larger serving size, so it gives more protein per serve (29g vs 23g) and much lower lactose.
Is pea protein as good as whey for building muscle?
A 12-week trial found comparable strength and muscle thickness gains between pea protein and whey, both well ahead of placebo.[2] The main difference is amino acid balance, not effectiveness.
Which protein powder is best if I'm avoiding dairy?
Pea Protein and Fava Bean Protein are both dairy-free with a complete amino acid profile. Pea gives more protein for less money; Fava Bean mixes smoother.
Ready to Choose?
The Clean Nutrition protein powder range covers dairy and plant-based options, all filler-free.
References
- Tang, J. E., Moore, D. R., Kujbida, G. W., Tarnopolsky, M. A., & Phillips, S. M. (2009). Ingestion of whey hydrolysate, casein, or soy protein isolate: effects on mixed muscle protein synthesis at rest and following resistance exercise in young men. Journal of applied physiology (Bethesda, Md. : 1985), 107(3), 987–992. https://doi.org/10.1152/japplphysiol.00076.2009
- Babault, N., Païzis, C., Deley, G., Guérin-Deremaux, L., Saniez, M. H., Lefranc-Millot, C., & Allaert, F. A. (2015). Pea proteins oral supplementation promotes muscle thickness gains during resistance training: a double-blind, randomized, Placebo-controlled clinical trial vs. Whey protein. Journal of the International Society of Sports Nutrition, 12(1), 3. https://doi.org/10.1186/s12970-014-0064-5
- Banaszek, A., Townsend, J. R., Bender, D., Vantrease, W. C., Marshall, A. C., & Johnson, K. D. (2019). The Effects of Whey vs. Pea Protein on Physical Adaptations Following 8-Weeks of High-Intensity Functional Training (HIFT): A Pilot Study. Sports (Basel, Switzerland), 7(1), 12. https://doi.org/10.3390/sports7010012