Price Comparison: Whey vs Casein Protein Per Gram
We analyzed 70+ products to find the real cost per gram of protein for both types
Whey is cheaper
Average Price Per Gram
Whey Average
$7.27/100g
77 products analyzed
Casein Average
7.32/100g
4 products analyzed
Price Difference
Whey is 0.05/100g cheaper (0.6%)
Cheapest Whey
$2.48/100g
NOW Sports - Whey Protein Isolate
Cheapest Casein
6.27/100g
NAKED - Casein Protein
Top 5 Cheapest by Type
Whey (Fast-Digesting)
-
NOW Sports
Whey Protein Isolate
Vanilla
$2.48/100g
10 lbs • 142 servings
-
Kirkland
Signature Whey
Chocolate
$3.71/100g
5.4 lbs • 70 servings
-
Animal
100% Whey Protein Powder
Chocolate
$3.92/100g
4 lbs • 60 servings
-
Dymatize
Elite 100% Whey Protein Powder
Vanilla
$4.19/100g
5 lbs • 67 servings
-
Optimum Nutrition
Gold Standard 100% Whey Protein Powder
Vanilla Ice Cream
$4.55/100g
10 lbs • 146 servings
Casein (Slow-Digesting)
-
NAKED
Casein Protein
Vanilla
$6.27/100g
5 lbs • 61 servings
-
BSN
Syntha-6 Ultra Premium Protein Matrix
Chocolate
$6.54/100g
2270 g • 48 servings
-
NAKED
Casein Protein
Vanilla
$7.06/100g
2 lbs • 25 servings
-
Dymatize
Super Mass Gainer
Vanilla
$9.41/100g
6 lbs • 8 servings
Key Differences Beyond Price
Why Whey Costs Less
- ✓ Mass production: Byproduct of cheese manufacturing, made at huge scale
- ✓ Lower processing: Simpler isolation process than casein
- ✓ Market competition: More brands, more options
When Casein Justifies the Premium
- ★ Slow absorption: Releases protein over 6-8 hours vs 30-60min for whey
- ★ Overnight recovery: Prevents muscle breakdown during sleep
- ★ Sustained energy: Better for periods between meals
Frequently Asked Questions
1. Which is cheaper: whey or casein protein per gram?
Whey protein is cheaper at an average of $7.27/100g vs $7.32/100g for casein. That's 0.6% cheaper per gram of protein.
2. Why is there a price difference between whey and casein?
Whey is a byproduct of cheese manufacturing and produced at much larger scale than casein. This economy of scale makes whey consistently cheaper. Casein requires more processing to isolate the milk protein, adding to production costs.
3. Is the price difference worth it for casein?
Casein provides sustained protein release over 6-8 hours, making it ideal for overnight recovery or periods between meals. Whey absorbs in 30-60 minutes. If you specifically need slow-digesting protein, the price premium may be justified.
4. How do I calculate price per gram of protein?
Use this formula: (Container price ÷ total protein grams). Calculate total protein by multiplying protein per serving by the number of servings in the container. This reveals the true cost regardless of serving size games.