Search  for anything...
BSN

BSN SYNTHA-6 Whey Protein Powder with Micellar Casein, Milk Protein Isolate, Chocolate Milkshake, 48 Servings (Packaging May Vary)

  • Based on 28,011 reviews
Condition: New
Checking for the best price...
$60.47 Why this price?
Holiday Deal · 8% off was $65.98

Buy Now, Pay Later


As low as $10.08 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

Non-returnable due to Food safety reasons

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, Dec 13
Order within 3 hours and 42 seconds
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Style: Protein Matrix


Flavor Name: Chocolate Milkshake


Size: 48 Servings (Pack of 1)


Features

  • BSN SYNTHA-6 IS RIDICULOUSLY DELICIOUS: We broke through the taste barrier once and for all. Choose from a wide range of protein powder flavors that deliver an unbeatable milkshake-like experience.
  • BSN PROTEIN MATRIX: 22g of premium protein from whey protein concentrate, whey protein isolate, calcium caseinate, micellar casein, milk protein isolate, and egg albumin
  • 10g OF ESSENTIAL AMINO ACIDS: Additional support for your nutrition and fitness goals
  • ANYTIME PROTEIN: Mix up your protein drink and enjoy post workout, between meals, as a snack, or as a treat
  • HIGH-QUALITY PROTEIN POWDER: Helps you reap the benefits of every training session by meeting your protein needs for muscle building and maintenance
  • SERVING SIZE: 47g (1 SCOOP): 190-200 calories and just 2-3g of sugar per serving depending on flavor

Description

BSN SYNTHA-6 is an ultra-premium protein powder with 22g protein per serving that ranks among the best protein blend options produced by BSN – a go-to protein shake for those who seek the spotlight inside and outside the gym. Even better, SYNTHA-6 quality comes with taste to match. Thanks to our exclusive flavor technology, you get a protein shake with unmatchable milkshake-like taste and consistency. Add 10g of essential amino acids, only 2-3g of sugar, and BSN’s dedication to quality, and you have a protein shake that’s perfect for anytime use - post workout, between meals, as a snack, or as a treat.

Brand: BSN


Flavor: Chocolate Milkshake


Servings per Container: 48


Item Weight: 5 Pounds


Diet Type: Gluten Free


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 7.75 x 7.75 x 11 inches; 5 Pounds


Item model number ‏ : ‎ 1047945


Department ‏ : ‎ GNC|ALL|ALL|PWD DIET W MILK NUT FACT


Date First Available ‏ : ‎ June 19, 2009


Manufacturer ‏ : ‎ Glanbia Performance Nutrition


Best Sellers Rank: #2,413 in Health & Household (See Top 100 in Health & Household) #35 in Sports Nutrition Whey Protein Powders #402 in Sales & Deals


#35 in Sports Nutrition Whey Protein Powders:


#402 in Sales & Deals:


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Dec 13

This item is non-returnable:

Non-returnable due to Food safety reasons

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Taste is on point
Style: Protein Matrix Flavor Name: Birthday Cake Remix Size: 2.59 Pound (Pack of 1)
Fantastic protein. Flavor was on point it mixed well I use milk in a shaker bottle and it mixes easily. It even has little pieces of birthday cake like confetti I love it. It's been easy on my stomach and digest well.
Reviewed in the United States on August 21, 2025 by Dustin nielsen

  • Talk about taste! DAAAAANG!
Style: Protein Matrix Flavor Name: Chocolate Milkshake Size: 48 Servings (Pack of 1)
Please feel free to read the hundreds of other reviews on this product, as they will provide you with invaluable information. However, it good to note that this product comes with Branched-chain amino acids, Glutamine peptides, is Aspartame free and stacks with a bunch of supplements. For the record however, I am going to voice my opinion solely on flavor in contrast to MYOFUSION Vanilla flavor. To be fair, I got MYOFUSION's vanilla flavor because I read the rather decrepit reviews of the other flavors. Being a college student and investing in 5 lb tubs every month means you better LOVE the flavor that you end up picking (however to GNC's credit, they do offer a 30 day trial and return period). In all honesty, the vanilla flavor was pretty decent. MYOFUSION lacks the aforementioned BCAA's, and from what I recall, each scoop is about 36g/ serving. Its good and flavor wise beat out GNC's generic whey protein, or even Warrior whey. So I read up reviews about BSN Syntha 6 and was shocked about how many positive reviews it got; specifically the chocolate version. Needless to say once I ran out of MYOFUSION, I quickly ordered Syntha-6. I received the item today, and couldn't wait to try it out (even though today is an 'off' day for me). Based solely on flavor and taste alone, I CANNOT stress how amazing it is with just a dash of 1% skim milk (less than half a cup). I mean it truly tastes like Chocolate milk. There is a creamy like texture, but not too thick (also depends on how much fluids you add obviously). Each heaping scoop is a mighty 44g (22g protein, 15g carbs, 2g sat fat, 2g sugars) and equates to 200 calories per! So be careful and make sure all your nutrient intake numbers play well with your goals; please read other reviews as well, and be sure to look at the product snapshot to get a gauge of the nutrients packed into this monster. I look forward to trying BSN for this whole month and seeing for any positive results when it comes to weight training. This thing is packed to the brim with nutrition and flavor; I cannot see why anyone would ignore this if you have a remote and passing interest in physical activity. For roughly $42, I can't imagine something that meets my nutrient requirements, balances cost, and doesn't skimp on the taste. AMAZING! p.s. This and the Blenderball (for mixing) are a marriage made in heaven! ... show more
Reviewed in the United States on May 11, 2011 by Adnan Mansoor

  • Delicious protein, great for muscle building
Style: Protein Matrix Flavor Name: Vanilla Ice Cream Size: 48 Servings (Pack of 1)
The media could not be loaded. My gym uses this protein for there blends at the juice bar and I decided to give it a try myself. It tastes good and I love the amount of protein it comes in the bottle. It's a large amount of protein so you definitely get your money's worth. It has 48 servings, 22 grams of protein, 190 calories and you can blend this protein before a workout, after a workout or both. You can blend it with water or any beverage in a 4-5 Oz cup. This will last me a long time! Watch my video for further details and hopefully it helps you make a decision on whether to get it or not. ... show more
Reviewed in the United States on June 10, 2025 by Joaquin Lomeli Jr.

  • Average macros, exceptional taste
Style: Protein Matrix Flavor Name: Cinnamon Toaster Pastry Size: 2.9 Pound (Pack of 1)
I will be blunt, if your goal for a protein powder is to maximize the protein to calorie ratio, this is not for you. However, if you don’t mind the extra calories or even need it, this protein powder is amazing. Creamier, tastier, and smoother than any other milk isolate protein powder I’ve ever had. It genuinely tastes like cinnamon toast crunch milk when mixed with milk. It even tastes good mixed with water. The macros are definitely not the most efficient for getting in pure protein, but if you’re buying Syntha-6, you most likely want something that tastes great, and this tastes great. In essence, great buy if you’re bulking or on maintenance. Probably look elsewhere if you’re cutting. ... show more
Reviewed in the United States on May 25, 2025 by Richard Nguyen

  • Tastes Great, But Macros/Calories are Questionable
Style: Protein Matrix Flavor Name: Vanilla Ice Cream Size: 48 Servings (Pack of 1)
This is a very good tasting protein powder, and it digests well for me. (I have had big problems with a few protein powders.) It mixes very easily with no lumps, and with whole milk, it tastes more like melted ice cream than a protein shake. The biggest downside is that there is no indication of how much of each protein is in this. It's whey and casein, but in what ratio? It would be good to know so I can judge how to best use it. Also, the calorie count is sus. If you add up the calories from fat, carbs, and protein, it comes to 169, but the label says 190. So I am really questioning what is going on there. It's too far off the just be rounding error. Also the 6 g. fiber is way higher than almost every protein powder I have ever seen, so that's a little sus also. I would say I just don't believe the label at all. It has a lower protein content than most protein powders, especially compared to all-whey powders. Around 52% of the calories are from protein. (Again, using the calculated calories, not the 190 on the label which cannot be correct.) Compare this to ~75% for typical wheys like Optimum Gold Standard, 70% for Ghost, and up to 90% for Transparent Labs. Overall, this is a lower-nutrition (or unknown nutrition) protein powder, but it tastes great and mixes well. If you are going for a bulk, this is a good breakfast protein booster. It seems to also be pretty good for post-workout and decent for bedtime snack, but that's where having the whey/casein ratio would really help determine where it fits best. I will most likely not buy it again due to the lower protein content and unknown protein ratios. Also note that the scoop does not hold 47 grams. I am seeing about 35 grams for a level scoop. Getting to 47 grams requires piling it so high that some inevitably falls on the countertop during prep. With a level scoop, you are getting only ~17 grams protein. ... show more
Reviewed in the United States on July 22, 2025 by Brandon Brandon

  • Great supplement highly recommend great flavor
Style: Protein Matrix Flavor Name: Chocolate Milkshake Size: 48 Servings (Pack of 1)
It’s everything I expected from Cynthia six. Good flavor, quality. Came really quick and I use it regularly.
Reviewed in the United States on August 22, 2025 by Robert Overton

  • best protein
Style: Protein Matrix Flavor Name: Chocolate Milkshake Size: 48 Servings (Pack of 1)
I used this protein since I serve in Army. always good taste and always good for restore my mustle
Reviewed in the United States on July 9, 2025 by Seungjae Mun

  • My favorite protein
Style: Protein Matrix Flavor Name: Chocolate Milkshake Size: 48 Servings (Pack of 1)
I'm a huge fan of Syntha 6 protein. It mixes well, tastes great, and has a cleaner ingredient list then most other options easily accessible.
Reviewed in the United States on July 10, 2025 by Kyle E

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...