Your Cart is Empty
But it doesn't have to be.
Continue Shopping.
Added to Cart
Cart Total:
Customers Also Bought:

Muscletech, Performance Series, Phase8, Multi-Phase 8-Hour Protein, Milk Chocolate, 4.6 lbs (2.1 kg)

Our Price:
You Save:
$28.00 (34)
  • Volume Discount
  • Buy 2+
    Save 5%
Earn 10% Loyalty Credit ?

This product is already in your Wish List.

View Wish List

This product is now in your Wish List.

Sorry, this product is no longer in stock.

In Stock
  • Expiration Date: Apr 2019
  • Shipping Weight: 6.7 lbs (3.04 kg)
  • Product Code: MSC-70352
  • UPC Code: 631656703528
  • Package Quantity: 4.6 lbs (2.1 kg)
  • Dimensions: 7.9 x 7.9 x 10.9 in, 5.25 lbs (2.38 kg)
Product Overview


  • All New
  • 50 Servings
  • 26 g Protein
  • 6 Protein Sources
  • 2.2 g Glutamine
  • 4.6 g BCAAs
  • Provides High Biological Value and Sustained Release Protein
  • 8 Hours of Amino Acid Delivery¹
  • Helps Prevent Muscle Breakdown
  • Natural and Artificial Flavors
  • Dietary Supplement
  • American Masters of Taste Gold Medal Superior Taste
  • Formulated with Clinically Dosed Key Ingredients

If you're serious about performance and results, you need the All-New MuscleTech Performance Series!

  • No Proprietary Blends
  • No Fillers
  • No Underdosed Key Ingredients
  • No Hype
  • No Banned Substances (WADA)
  • No Exceptions

Just the Most Powerful Formulas Available.

The Complete Sustained-Release 8-Hour Protein Formula

Phase8 is designed to do one thing - feed your muscles the highest quality blend of protein available. Each serving of Phase8 delivers a 26-gram blend of proteins taken from multiple sources with variable digestion rates. The multiple release rates of amino acids feeds your muscles for 8 hours - that's prolonged delivery of key musclebuilding blocks, making Phase8 the perfect protein for any time of the day - or night.

8-Hour Sustained-Release Protein Absorption

The main protein component in Phase8 has the unique ability to release amino acids in your bloodstream for 8 hours after taking it.¹ Because of these sustained-release properties it's a highly anabolic and anti-catabolic protein that helps create a musclebuilding environment for longer periods of time.

6 High-Quality Protein Sources

Overall, Phase8 contains protein sources designed to digest at different rates - putting your body in the perfect state for repair and recovery.

Biological Value of Protein Sources

Protein BV Phase8
Hydrolyzed Whey Protein Isolate 104
Whey Protein Isolate 104
Whey Protein Concentrate 104
Milk Protein Concentrate 91
Calcium Caseinate 77
Micellar Casein 77
Soy Protein 74 X
Brown Rice 70 X

Other multi-phase protein formulas contain protein derived from plant sources, such as brown rice or even soy, and are often loaded with fat and carbs. Phase8 contains high quality milk-derived protein and has half the fat and carbs of the leading competitor.

Phase8 Multi-Phase Protein Delivery Digestion Rates

Protein Blend in Phase8 - Super Fast - Fast - Medium - Slow - Super Slow—8 Hrs!

Best-in-Class Taste

Phase8 was flavored by one of the world's top flavoring houses by protein flavoring experts in order to taste better than any other protein on the market.

Take Anytime: Morning, Pre-and Post-Workout and at Night

Phase8 contains a unique blend of proteins that allows you to take it whenever you need it. The multi-phase protein delivery supplies the needed quick release of amino acids for post-workout amino acid delivery, the medium release protein phase for between meals and the slow-digesting protein phase for night time use - making Phase8 the perfect choice for any situation.

¹Lacroix et al., 2006. The American Journal of Clinical Nutrition.

Suggested Use

Mix 1 serving (1 heaping scoop) with 7 oz or mix 2 servings (2 heaping scoops) with 14 oz of cold water or skim milk in a glass or shaker cup. Use between major meals and after exercise. Drink 8 to 10 glasses of water daily. For maximum results, consume 4 scoops daily for a minimum of six weeks.

Other Ingredients

Protein blend (milk protein concentrate [supplying calcium caseinate and whey], whey protein concentrate, micellar casein, calcium caseinate, hydrolyzed whey protein isolate, whey protein isolate), maltodextrin, taurine, cocoa processed with alkali, glycine, natural and artificial flavors, sunflower based creamer (sunflower oil, corn syrup solids, sodium caseinate, mono and diglycerides, dipotassium phosphate, tri-calcium phosphate, tocopherols [emulsifier]), salt, soy lecithin, guar gum, sucralose, ascesulfame potassium.

Contains milk and soy ingredients. Processed in a facility that also processes wheat, egg, fish and shellfish.


Note: To maintain product freshness, store in a cool, dry place. This product is sold by weight. Some settling may occur. Shake container before use.

Do not use if pregnant or nursing. Consult a medical doctor before starting any diet or exercise program. Discontinue use and consult a medical doctor if you experience unusual symptoms. Do not use if packaging has been tampered with.

Notice: Use this product as a food supplement only. Do not use for weight reduction.

Supplement Facts
Serving Size: 1 Scoop (42 g)
Servings Per Container: Approx. 50
  Amount Per Serving % Daily Value
Calories 150  
Calories from Fat 20  
Total Fat 2 g 3%*
Trans Fat 0 g
Cholesterol 5 mg 2%
Total Carbohydrate 7 g 2%*
Dietary Fiber 1 g 4%*
Sugar 0 g
Protein 26 g 52%*
Calcium 20 mg 2%
Iron 1 mg 6%
Sodium 120 mg 5%
Digestive Enzyme Matrix 100 mg
Papain 50 mg
Amylase 50 mg
*Percent Daily Values are based on a 2,000 calorie diet.
†Daily Value not established.
The Phase8 Advantage
Ingredient Phase8 Competitor #1 Competitor #2
Protein 26 g 22 g 24 g
Protein Sources All high quality milk-derived proteins Milk-derived proteins and egg protein Low biological value brown rice protein along with egg and milk-derived proteins
Carbs 7 g up to 15 g 9 g
Fat 2 g up to 6 g 3 g
iHerb Customer Reviews


Posted by 5501068110334248554 on Sep 05, 2016

One of the better proteins I've tasted it's light and easy to disolve. Does keep your stomach full for around 4 hours. Tasted amazing with milk or water. Would love to taste the other flavours.

Verified Purchase

Was this review helpful to you?

My Third Phase 8 Flavour, Very Enjoyable, I'm hooked 🍫🐄

Posted by MrSmiley on Jul 12, 2016

Wonderful Flavor, Mix Easily, Good & Fast Service from iHerb. As with my other Muscletech Phase 8 reviews, the slow digestion of this whey over 8 hours gives you the raw materials your body needs to recover and build new muscles while you sleep if you use it at night. I LOVE IT.

Verified Purchase

Was this review helpful to you?

great taste

Posted by 5631477103787137306 on Jun 20, 2016

great taste, chocolate. good solubility

Verified Purchase

Was this review helpful to you?

Lousy Product - causes stomach discomfort for 5days

Posted by 5308960786615992143 on Feb 14, 2016

This protein mix is hard to digest - causes stomach bloated-ness and pain for 3-5 days. It happened to me and my colleague who bought the same thing. The flatulence it causes is frequent and smelly too.

Verified Purchase

Was this review helpful to you?

Great product but not without flaws.

Posted by 4667548592701385778 on Jan 29, 2014

I love the nutritional stats on this product and the fact that they do not include proprietary blends, which usually don't really work the right way. But, the taste isn't quite good. And, most frustratingly, the powder is so fine it sticks to everything and oftentimes is hard to mix it when it lodges and lumps in the corners of the shaker. Other than that, really nice product.

Verified Purchase

Was this review helpful to you?