SYNTHA-6™ – Chocolate MilkshakeChocolate Milkshake | GNC



Item # 387573
Note: This product cannot be sold in Canada

Product Information



  • Multi-Functional Ultra-Premium Protein Matrix
  • Naturally Occurring BCAAs and other Essential and Non-Essential Amino Acids
  • MCTs, EFAs, Glutamine Peptides, and Fiber
  • Zero Milligrams of Aspartame
Stack with NITRIX® 2.0, N.O.-XPLODE™2.0 AND CELLMASS® 2.0 for maximum physique and performance impact.

DESIGNED FOR: Any individual who wants an ultra-premium protein powder to help them reach their nutritional and physique goals.


Nutrition Facts
Serving Size  1 Rounded Scoop(s)
Servings Per Container  97

Amount Per Serving     % DV

Calories 200  
  Calories from Fat 50  

Total Fat 6g   9%
  Saturated Fat 2g   10%
Trans Fat 0g  
Cholesterol 70mg   23%
Sodium 220mg   9%
Total Carbohydrate 15g   5%
  Dietary Fiber 5g   20%
  Sugars 2g  
Protein 22g   44%
Potassium 300mg   9%

Vitamin A 0   0%
Vitamin C 0   0%
Iron 0   8%
Phosphorus 0   15%
Magnesium 0   6%

Calcium  0   **

** Daily Value (DV) not established.
Other Ingredients
A sustained release ultra-premium protein matrix comprised of, Richmix Sunflower powder consiting of, Litesse® II Polydextrose, Natural and Artificial Flavors, Nutrisperse MCT powder consisting of, Ticalose® Cellulose Gum, Sucralose, Acesulfame Potassium, Lecithin (Soy), Aminogen®;, Papain
Label (click image to enlarge)

How To Use

Take 1 scoop with 4-5 oz. of cold water or any beverage of your choice. To increase your protein intake per serving and to achieve an amazing milkshake taste, use non-fat or low fat milk.
Contains Milk, Egg, Wheat, and Soy (Lecithin) ingredients. Manufactured on equipment which processes products containing milk, egg, soybeans, wheat, shellfish, fish oil, tree nuts, and peanut flavor.
Before consuming SYNTHA-6 ™ seek advice from a physician if you are unaware of your current health conditions, have any pre-existing medical condition, taking any medication, planning any medical procedure, contemplating pregnancy, pregnant, or nursing. Reduce or discontinue use if any adverse reactions occur such as but not limited to gastrointestinal discomfort. SYNTHA-6 ™ is only intended to be consumed by healthy adults 18 years of age and older. Keep out of reach of children and pets. Store in a dry place away from direct sunlight.
Developed By & Manufactured Exclusively For: Bio-Engineered Supplements & Nutrition, Inc., Boca Raton, FL 33487. Made in the USA. This product contains ingredients of international and domestic origin.


4.7 / 5.0
171 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Must try
So good and doesn't have that artificial sweet taste
June 11, 2019
3 weeks ago
Best flavor IMO
Mixes up smooth, tastes great!
May 4, 2019
1 month ago
Great tasting protein that gives great results.
April 30, 2019
2 months ago
Bad customer service
Ordered it and then GNC canceled my order because it ran out of stock .. even tho when I placed the order it was in stock . Made me mad tbh .
April 10, 2019
2 months ago
Delicious. Only protein I drink
March 16, 2019
3 months ago
You get what you pay for.
Best working protein shake taste amazing work well with frozen fruit or vegetable it's worth it!!
March 14, 2019
3 months ago
I've tried the strawberry milkshake and the chocolate milkshake. I love both but the chocolate is my favorite. I mix mine with crushed ice, half a banana and 5 oz of 2% milk, it legit taste like a milkshake!!!! My 3 year old swears it's ice cream.
January 29, 2019
Good product
Amazing taste, but a little high in cholesteryl
January 26, 2019
5 months ago
One of the best
Probably my favorite flavor. Great taste. Seems to clump more than it has in recent years. Also does not go well with hot water like GNC mass gainer does for a hot chocolate type drink.
January 2, 2019
6 months ago
Excellent Protein
I'm not an expert at all of the different protein powders, but I've been using this protein supplement for about four months. I needed to increase my protein intake.

In the morning, a scoop of this blended with a frozen banana and almond milk make an excellent breakfast.

I've tried to significantly increase my protein percentage and lower fats and carbs as part of my daily eating plan. This supplement definitely helps me.

I've also enjoyed many of their flavors -- Mint Chocolate Chip, Chocolate and Vanilla.
December 30, 2018
6 months ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 50 questions Browse 50 questions and 53 answers
Will this product help me LOSE weight if I use as a meal replacement?
A shopper on Apr 27, 2016
Best and fast working meal replacement shakes for lossing weight?
A shopper on May 2, 2016
I am a 55yr. old morbidly obese diabetic woman, who is trying hard to get healthy, I am interested in this product and the chocolate mint kind, after reading the nutritional value of the product I was concern about the sodium content, which is 220mg./9%, I am worried that it will effect my blood pressure, will this cause it to go up?
A shopper on Jan 19, 2012
BEST ANSWER: The amount of sodium in this shake is 9% of the "recommended" daily intake of sodium. As long as you use this supplement as directed and watch your sodium intake on the other items you eat during the day, that small amount will not cause your blood pressure to rise.
Im trying to lose weight and gain Muscle, will this be a great choice to use???
A shopper on Mar 1, 2010
BEST ANSWER: Forget about the scale and break out your tape measure. What you are seeking is not about weight, but more so about body content. If you commit to a solid workout program, you are more than likely to GAIN weight. However you will LOSE INCHES. You want more muscle and less fat. Muscle has a higher density than fat and carries more mass in less space, thus the tape measure as opposed to the scale.
what's the time i drink it is the best time?
A shopper on Feb 7, 2017
BEST ANSWER: Though I'm a doctor with an interest in exercise physiology, I make no claim to be a doctoral level exercise physiologist with research credentials. That said, there is a decent body of literature, at least for endurance sports, that taking in nutrition within 30-60 minutes after a workout is important for optimizing recovery from and adaptation to an exercise stimulus. Personally, if I do a morning run/workout, I'll plan on having a protein shake or some other source of protein with my breakfast within 30 minutes of finishing the exercise.
Can my 13 year old drink this?
A shopper on Mar 24, 2016
BEST ANSWER: It's always great to consult their pediatrician, but with my medical and nutrition background I don't see anything in it that would harm them in any way.
I want to gain more weight, but in muscle. is this a good product for it?
A shopper on Dec 10, 2009
BEST ANSWER: Yes, any quality protein supplement will help you, this one however TASTE GREAT and you will look forward to drinking it. If you have a solid training program you will do just fine....pump em up!
I'm eating right, exercising every day and have lost 30lbs in three months. Is this product good for a meal replacement during my weight loss endeavor. I don't want to consume anything that will stall my progress or possibly make me gain. Please advise.
A shopper on Apr 19, 2012
BEST ANSWER: Cynthia-6 contains 200 calories and 6 grams of fat (2 of which are trans fat) per serving. According to this, it would be safe to say that by replacing your meal with this product you would not gain weight as the smallest meal contains more fat and calories than Cynthia-6.
Im trying to gain lean muscle such as running back kind of muscle but not linebacker kind of muscle. Is this a good supplement for that goal? Also, do i use this as my pre-workout or after-workout shake? Or both?
A shopper on Feb 27, 2012
BEST ANSWER: This is a good product to meet your goals, so long as you follow the directions on the label. It doesn't matter whether you take this pre or post-workout.
How quickly will you see results?
A shopper on Apr 20, 2016
BEST ANSWER: Depends on the quality of your workout and nutrition...
I am a 65 year old active male adult and retired for 31/2 years. I visit my local health club 3-4 times per week, and utilize several exercise machines while there, including the rowing machine, treadmill, preacher curl, abdominal crunches, etc. I also play raquetball and basketball. My question is, would it serve me well to substitute this product in place of my normal breakfast and also as a late day snack or meal?
A shopper on Mar 3, 2017
BEST ANSWER: Absolutely! I always have a shake first thing in the morning, followed by my coffee. I usually mix it with unsweetened almond milk which is low in calories and sugar. And would also have a shake as opposed to an unsatisfying snack later in the day - sometimes after work you just feel hungry but it's too late for a meal. It is also very portable. I usually keep a scoop in my shaker cup dry - add water if I ever am in a position to miss a meal or stop at a fast food place.... Keep up the good work at the health club. :)
can this product help me gain weight?
A shopper on Jun 24, 2014
BEST ANSWER: It is a protein drink so it can be used to help increase muscle mass and weight.
how many milli-litres is 4 to 5 oz
A shopper on Apr 19, 2014
BEST ANSWER: It is about 140 ml.
Is this suitable for somebody with Type 1 diabetes?
I currently take another product that is but would like to change.
A shopper on Feb 21, 2014
BEST ANSWER: There is 2.5 grams of sugar per dose of this tablet. You should consult your doctor before taking any supplements.
Is this a product for women who don't want to bulk up, just to build lean muscle and endurance, but maintain a slim figure?
A shopper on Nov 15, 2013
BEST ANSWER: This can be used by men or women.
I'm 20 years old trying to gain muscle weight, i workout 4 to 6 days a week, when should i take this and how many scoops per serving in order to achieve my goal?
Ps. To grow muscles
A shopper on Jul 25, 2013
BEST ANSWER: The label states that you should take 2 scoops with 10 oz of cold water or any beverage of your choice. Drink 2-4 servings daily, or as needed to satisfy your protein or muscle enhancing requirements. To increase your protein intake per serving, you can use non-fat or low fat milk.
How many different types of protein are in the product? Can you list all of them?
A shopper on Jul 13, 2013
BEST ANSWER: BSN Syntha-6 contains protein sourced from Whey, Milk, and Egg Albumen.
I already take this after my workout. I wanted to know when are other times I should take it
A shopper on Jun 19, 2013
BEST ANSWER: The label does not specify any specific time of day to take this. I think it is a great post-workout supplement!
IS it okay to take this in the morning then after i work out in the afternoon?
A shopper on May 8, 2013
BEST ANSWER: Yes, you can take up to 4 servings a day.
I am looking for a low sugar (less than 2 grams per serving) Whey / Casein blend of Protein Powder - would this be a good choice?
Thank You,
A shopper on May 8, 2013
BEST ANSWER: Unfortunately, this product may not be the best choice for you. There are 4 grams of sugar per serving.
how many times should you take this a day?
A shopper on May 7, 2013
BEST ANSWER: 2-4 servings should be taken each day. As per the instructions, exactly how many servings taken will depend on individual protein requirements.
Is this safe for a person who is pregnant?
A shopper on Apr 29, 2013
BEST ANSWER: Contact your doctor before begging this during pregnancy.
Looking for a good meal replacement for to support weight loss.
Is this a good product to help support weight loss?
A shopper on Mar 17, 2013
BEST ANSWER: This product is a meal replacement shake which is recommended for weight management.
I have been doing Crossfit for quite awhile. If you know what Crossfit is, you know it is high intensity and I was wondering if this product would help me alot? and if not this one what would you recommend?
A shopper on Mar 5, 2013
BEST ANSWER: If you are currently not using a supplement then yes this product will be very beneficial. If you are already using a supplement then this product is not likely to be helpful in addition to your current supplement.
Hi i am 18 years ol and im in wrestling i want to take this to get me to 182. I weigh 162 right now. Will this get me there. Will this mess with my joints later on in my life.
A shopper on Feb 19, 2013
BEST ANSWER: You may prefer a higher calorie protein supplement that is specially formulated for weight gain.
when is best for me to use it?
A shopper on Jan 29, 2013
BEST ANSWER: The label states that you can use it anytime. BSN® SYNTHA-6™ has the protein you need to fuel your body for a workout. A customer reviewing the product says it's good for recovery after running. This has a significant amount of your recommended intake of fiber. Depending on your diet, you may want to consider using the product when at home until your body adjusts.
I'm trying to get my 15 year old to gain muscle and weight. Is this a good product for him, or is there something else out there.
A shopper on Jan 1, 2013
BEST ANSWER: Yes, this product supports muscle enhancement.
I am looking to gain muscle whilst keeping the same weight not loose or gain. Will this item help with muscle growth?
A shopper on Nov 25, 2012
BEST ANSWER: This will only help muscle growth as long as you keep a strict diet and exercise program.
im looking to gain muscle, is this product right for me or should i get a whey protien? i would be taking creatine with it also
A shopper on Oct 21, 2012
BEST ANSWER: Yes you can take this product and creatine if your looking to gain weight.
Will this product help me gain weight.?
A shopper on Sep 29, 2012
BEST ANSWER: This product will help to develop muscle growth. As muscle weighs more than fat, it will help you gain weight.