100% Casein Protein (Optimum Nutrition)

User rating

3.8

out of 5

1567 user reviews

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Format	Store	Notes	Price/serving	Price
4 lb	A1Supplements.com	Shipping: Calculated by weight Save $5 on orders > $90: Code - 5OFFA1 Free gift with orders > $90 Save 4% on orders > $200 Save 8% on orders > $500	$0.74	$42.95
4 lb	I'll Pump You Up	5% off any order: Code - SubstanceReviews	$0.74	$42.95
4 lb	Bodybuilding.com	Shipping: Flat rate - $5.99 (up to 40 lb) 5% off new customers: Code - NewCustomer5PerOff Other coupon codes on the left side of this page	$0.77	$44.89

Sometimes slower is better - especially when it comes to the rate of protein digestion. While rapid protein absorption is desirable immediately before or after exercise, delayed release is probably more beneficial throughout the remainder of the day.

Casein proteins are pH sensitive and gel in the acidic environment of the stomach. As a result, it can take more than twice as long for caseins to be broken-down into their amino acid sub components than whey and other proteins. Because of these unique "time-released" qualities, caseins are aptly described as being anti-catabolic, or muscle-protecting, proteins.

Average user rating from: 1567 users


Overall rating		3.8
Euphoria (4 ratings)		3.9
Mental energy (1 rating)		1.0
Focus (1 rating)		0.5
Length of effects (1 rating)		5.0
Low development of tolerance (1 rating)		1.0
Low dependence (1 rating)		1.0
Fat loss (22 ratings)		4.4
Vascularity (3 ratings)		2.2
Pump (4 ratings)		4.0
Thermogenic effect (2 ratings)		3.5
Texture (468 ratings)		4.0
Muscle gain (66 ratings)		4.4
Strength (21 ratings)		3.8
Taste (1386 ratings)		4.2
Mixes well (402 ratings)		4.3
Safety (5 ratings)		5.0
Suppressed appetite (19 ratings)		3.9
Recovery ability (81 ratings)		4.7
Anti-catabolic (37 ratings)		4.7
Endurance (6 ratings)		3.6
Low side effects (2 ratings)		3.0
Physical energy (11 ratings)		4.2
Value for money (125 ratings)		4.3
Ingredient profile (39 ratings)		4.5

Reported side effects (adverse events)


Diarrhea	4 users (0%)
Difficulty sleeping	2 users (0%)
Gas or bloating	7 users (0%)
Nausea or vomiting	4 users (0%)
Shakes	7 users (0%)
Upset stomach	5 users (0%)

Find other supplements effective for

Muscle gain


Texture		but because the casein is so thick I switched to water.
Taste		The taste is decent, not great
Mixes well		I haven't had any mixing issues like some others have mentioned - I use a shaker with a wire ball and it mixes fine with milk or water.

Upset stomach	This product does not upset my stomach like the whey protein has in the past.


Taste		I just tried this flavor and it's not bad.
Taste		I love chocolate and you can taste the peanut butter.
Taste		Another great tasting protein from Optimum.I drink one shake in the afternoon and one before I go to bed mixing it with water.
Taste		I recommend this new flavor.


Taste		Very tasty product and excellent dessert after a hard days work and workout!


Taste		As far as Casein protein goes, it's pretty good tasting.


Taste		but the Chocolate Supreme tastes great..a little different than the chocolate Whey protein


Muscle gain		I have gained right at 2 pounds using this product (30 days).
Taste		Not to mention it actually taste gooooood unlike some others!!!


Texture		Doesn't mix as well as ON's whey and is a little chalky if not mixed with enough liquid,


Texture		Thick texture compared to ON's whey, which is nice because its really filling.
Taste		I'm not a big fan of powders that taste the part.


Taste		The taste is incredible, I put it on anything and it immediately becomes great.


Taste		tastes great and settles very well... haven't gotten any gas or stomache aches after taking alone or with food.
Taste		but i don't mind because the taste is excellent.


Taste		Very creamy taste, artifical tasting
Taste		but whatever I wish they had a unflavored casein version 9/10 because of that haha


Texture		Taste and texture are perfect.
Taste		Taste and texture are perfect.
Taste		I have a shake before bed and also mix the powder in with my ON 100% whey to make it creamier and tasteful.


Taste		but it is so sad that the flavor is so bad.
Taste		It is the most artificial tasting thing I have tried!
Taste		but with 2lb as minimum I don't think I will risk a 3rd time!!! Go with Beverly Intl UMP, it is the best tasting micellar casein I have ever tried.


Texture		This protien is super thick, you need lots of water/milk to make it drinkable.
Texture		If you can get past the strange texture and the crazy noises your stomach makes after drinking this - then I say go for it!


Taste		mixes well, tastes great, good value, great protien to take right before bed to feed muscle while asleep.
Mixes well		mixes well, tastes great, good value, great protien to take right before bed to feed muscle while asleep.
Value for money		mixes well, tastes great, good value, great protien to take right before bed to feed muscle while asleep.


Taste		I have tried most of the flavors of the ON Casein and have found them all to be pretty decent.
Taste		Based on reviews I tried the Vanilla and it is flat out delicious!
Taste		Usually vanilla flavored shakes taste horrible,
Taste		but this one is great!! Tastes excellent and great results just like all the ON products I have used.


Fat loss		but I haven't lost much body fat, percentage-wise.
Taste		This was my first protein purchase (along with the Optimum 100% Whey Protein strawberry), and I have to say, I have come to love the taste of this product.
Taste		However, I love the taste of the Cookies and Cream (don't like the chemical taste in the strawberry,
Taste		although it's more bearable when mixed with this cookies and cream flavor).
Mixes well		although it's more bearable when mixed with this cookies and cream flavor).

100% Casein Protein (Optimum Nutrition)

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