Pea protein and whey protein are both complete, high-quality proteins. Whey comes from milk, absorbs quickly and has the highest leucine content of any protein. Pea protein comes from yellow split peas, is dairy-free and vegan, and in isolate form is low in fermentable carbohydrates. For most people the right choice comes down to how you tolerate dairy, how you eat, and when you use your protein, not which one is "better".
I make both. Pure Native WPI was the first product of its kind in Australia, and Organic Pea Protein was the first certified organic pea protein powder in Australia. So I'm not here to talk you out of either. This guide gives you the honest comparison I give my clients.
Pea protein vs whey at a glance
|
|
Organic Pea Protein |
Pure Native WPI |
|---|---|---|
|
Source |
Organic yellow split peas (plant) |
Grass-fed cow's milk (dairy), sourced from Ireland |
|
Protein per serve |
20 to 23g per 28g, depending on flavour |
24 to 26g per 30g, depending on flavour |
|
Complete protein |
Yes (naturally lower in methionine) |
Yes |
|
Leucine |
Good for a plant protein |
Highest of any protein |
|
Absorption |
Moderate, steady |
Fast |
|
Dairy and lactose |
None |
Dairy protein; very low lactose |
|
Vegan |
Yes |
No |
|
Low FODMAP |
Vanilla and Natural are FODMAP Friendly certified |
Not certified |
|
Organic |
Certified organic |
Grass-fed; not certified organic |
|
Tested |
Batch-tested for heavy metals |
Heavy-metal tested to EU standards; rBST-free and antibiotic-free |
|
Taste and texture |
Mild, earthy (Natural); slightly thicker |
Creamy, milky; very smooth |
|
Environmental footprint |
Low |
Higher |
|
Best for |
Dairy-free, vegan, low FODMAP, everyday use |
Fast post-training protein, if you tolerate dairy |
Which is better for you: pea protein or whey?
Neither is better for everyone. Here's how I help people choose.
Choose pea protein if…
- You avoid dairy, have a cow's milk protein allergy, or eat vegan.
- You follow a low FODMAP diet. Our Vanilla and Natural are FODMAP Friendly certified.
- You want a single-ingredient protein. Natural is 100% certified organic pea protein isolate.
- You want a lower environmental footprint.
Choose whey protein if…
- You tolerate dairy well.
- You want the fastest-absorbing protein after training.
- You prefer a creamy, milky texture in shakes.
- You want the most protein per scoop.
Can you have both?
Yes. Plenty of my clients use whey after training and pea protein in smoothies, baking and savoury food the rest of the week. What matters is your total daily protein, not which powder it comes from.
Can you build muscle with pea protein?
Protein contributes to the growth and maintenance of muscle mass, whichever source it comes from. The research comparing pea and whey directly is encouraging.
In a 12-week randomised, placebo-controlled trial of 161 men doing resistance training, participants taking pea protein had similar gains in biceps muscle thickness to those taking whey, and both groups gained more than placebo (Babault et al., Journal of the International Society of Sports Nutrition, 2015). An 8-week trial in adults doing high-intensity functional training found similar changes in body composition, muscle thickness and strength between pea and whey groups (Banaszek et al., Sports, 2019).
The practical rules are the same for both: reach your daily protein target, spread protein across your meals, and pair it with regular strength training.
Which protein is best for muscle gain?
Whey has the highest leucine content and the fastest absorption, which is why it has been the default for athletes for decades. But the studies above suggest that when total protein is matched, pea protein performs similarly for people doing resistance training. The best protein for muscle gain is the one you'll take consistently and digest comfortably.
Downsides of each
Is there a downside to pea protein?
- Legume allergy. Avoid pea protein if you have a diagnosed pea or legume allergy.
- Lower methionine. Easily covered by a varied diet with grains, seeds, eggs or fish.
- Taste and texture. Unflavoured pea protein tastes mild and earthy, and it's thicker than whey. Vanilla, Cocoa and Salted Caramel mask this.
- Concentrates can cause bloating. Choose an isolate, which has most of the fermentable carbohydrate removed.
Is there a downside to whey protein?
- Dairy. Whey is a milk protein, so it's unsuitable for a cow's milk protein allergy and for vegans.
- Lactose. Isolate is very low in lactose, but very sensitive people may still react. Our WPI Natural is the best whey option if that's you.
- Concentrates. Whey protein concentrate (WPC) contains more lactose and fat than isolate (WPI). Read more in How to Choose the Right Whey Protein Powder.
Why I make both
When I created Pure Native WPI, I wanted the cleanest whey available: grass-fed, cold-filtered to keep the protein undenatured, sourced from Ireland, heavy-metal tested to EU standards, and free from rBST and antibiotics.
When I created Organic Pea Protein, I wanted a protein for everyone who can't or won't have dairy: certified organic, an isolate rather than a concentrate, batch-tested for heavy metals, with a Natural flavour that's a single ingredient.
They do different jobs, and plenty of kitchens need both.
Quick guide: which one should you buy?
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If you… |
Choose |
|---|---|
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Avoid dairy or eat vegan |
|
|
Follow a low FODMAP diet |
|
|
Want a single-ingredient protein |
|
|
Want the fastest protein after training |
|
|
Love a creamy, milky shake |
|
|
Want protein for baking and savoury food |
For everything else about pea protein, read my full guide: The Benefits of Pea Protein. For whey, see Whey Protein Powder: Your Questions Answered.
Pea protein vs whey: frequently asked questions
Which protein powder is better, pea or whey?
Neither is better for everyone. Both are complete proteins. Whey absorbs faster and has more leucine; pea protein is dairy-free, vegan and, in isolate form, low in fermentable carbohydrates. Choose based on how you tolerate dairy and how you eat.
Should I choose whey or pea protein?
Choose pea protein if you avoid dairy, eat vegan or follow a low FODMAP diet. Choose whey if you tolerate dairy and want the fastest-absorbing protein after training. Many people use both.
Can I build muscle with pea protein?
Protein contributes to the growth and maintenance of muscle mass. Studies comparing pea and whey protein in people doing resistance training have found similar gains in muscle thickness and strength when protein intake is matched.
Is pea protein easier to digest than whey?
For people sensitive to dairy, often yes, because pea protein contains no lactose or milk protein. Whey isolate is very low in lactose and suits most people who tolerate dairy. Isolates of either are easier on the stomach than concentrates.
Is pea protein or whey better for a low FODMAP diet?
Pea protein isolate is low in fermentable carbohydrates, and our Organic Pea Protein Vanilla and Natural are FODMAP Friendly certified. Whey isolate is low in lactose but our WPI is not FODMAP Friendly certified.
Does pea protein taste as good as whey?
Whey has a creamier, milkier taste. Unflavoured pea protein is mild and slightly earthy, which suits baking and savoury food. Flavoured pea protein in Vanilla, Cocoa or Salted Caramel tastes closer to a classic shake.
Can I mix pea protein and whey together?
Yes. Mixing them gives you whey's fast absorption and creaminess with pea protein's plant protein. Just count both towards your daily protein total.
Which has more protein per serve?
Our Pure Native WPI provides 24 to 26g of protein per 30g serve and Organic Pea Protein provides 20 to 23g per 28g serve, depending on flavour.
Where can I buy pea protein and whey protein in Australia?
Both are available online at thehealthychef.com with Australia-wide delivery, and from our stockists.
This article is general nutrition information and is not a substitute for personalised advice from your doctor or dietitian. Our protein powders are foods and should be enjoyed as part of a balanced diet.
