System Stack 2 Lb. Pro
JYM Supplement Science

System Stack 2 Lb. Pro ,

Stack Your Results!
An Advanced Stack Designed To Enhance Workout Performance And Recovery!
9.8  out of 10  (43 Reviews)

Product Overview


Put simply, Pre JYM is the most effective pre-workout supplement we have ever developed. It's built on solid science, years of study, and decades of professional experience. Nothing is hidden, and there is no filler. Pre JYM is research made real. It's pure pre-workout fuel.

  • Full doses of 13 science-backed ingredients.
  • 6 grams of citrulline malate to promote better muscle endurance and bigger muscle pumps.*
  • 6 grams of BCAAs in the 2:1:1 ratio best for blunting muscle fatigue, boosting muscle performance, and increasing muscle growth.*
  • 2 grams of creatine HCL for greater strength, endurance, and muscle growth.*
  • 2 grams of beta-alanine to boost muscle power, strength, endurance, and muscle growth.*
  • 1.5 grams of betaine for greater power and strength during workouts.*
  • 600 milligrams of N-acetyl L-cysteine to blunt muscle fatigue and keep you training stronger, longer.*
  • 500 milligrams of betavulgaris L.(beet) extract to provide real nitric oxide donors for bigger pumps and better energy.*
  • 300 milligrams of caffeine to boost alertness and drive, increase muscle strength and endurance, during workouts for greater training intensity.*
  • 300 milligrams of Alpha-Glyceryl Phosphoryl Choline (50%) for better drive, focus, and strength in the gym.*
  • 50 micrograms of huperzine A to increase mental focus and establish a stronger mind-muscle connection.*
  • 5 milligrams of BioPerine® to enhance absorption of the active ingredients in Pre JYM for even better results.*

Post JYM Active Matrix
  • Full doses of 8 science-backed ingredients
  • 6 grams of BCAAs in a 3:1:1 ratio that enhances muscle growth*
  • 3 grams of glutamine for better recovery and growth*
  • 2 grams of creatine HCL for greater strength, endurance, and muscle growth*
  • 2 grams of beta-alanine to boost muscle power, strength, endurance, and muscle growth*
  • 2 grams of Carnipure L-carnitine L-tartrate to aid recovery and put more testosterone to work for you*
  • 1.5 grams of betaine for greater power and strength during workouts*
  • 5 milligrams of BioPerine® to enhance absorption of the active ingredients in Post JYM for even better results*

6 grams of Branched-Chain Amino Acids (BCAAs)

  • The BCAAs are three amino acids—leucine, isoleucine, and valine—that share a common structure.
  • Leucine is the most critical after workouts because it stimulates muscle protein synthesis (i.e., muscle growth) by activating the mTOR complex.*
  • It also increases insulin release, which drives more amino acids, creatine, and carnitine from Post JYM into your muscle cells.*
  • Having a 3:1:1 ratio of leucine to isoleucine to valine in a post-workout product, such as in Pre JYM, provides an extra bit of leucine for maximal muscle growth without compromising the critical role that isoleucine and valine play in this process.*

JYM Post JYM Carb

After workouts, a fast-digesting (high-glycemic) carb is one of the most critical nutrients to ingest. Fast carbs are necessary to replenish the muscle glycogen that you burned during the workout as quickly as possible.*

  • Research confirms that working out for as little as 30 minutes can deplete muscle glycogen levels by more than 40%. Intense workouts lasting 60-90 minutes would deplete muscle glycogen levels considerably more.
  • When carbs are consumed immediately postworkout, a supercompensation of muscle glycogen stores is possible. In fact, delaying carb consumption by just 2 hours has been suggested to reduce the rate of glycogen replenishment by 50%.
  • Another benefit of high-glcyemic carbs is the insulin spike that they deliver. A post-workout increase in insulin helps maximize the uptake of creatine and carnitine (included in Post JYM Active Ingredients Matrix) by the muscle cells.*
  • Dextrose is one of the fastest-digesting carbohydrates you can consume. It’s essentially glucose (what blood sugar is) and therefore needs no digesting and is absorbed by the body almost immediately.*


Each scoop of Pro JYM delivers 24 grams of pure, quality protein. It’s not "spiked" with single amino acids to artificially increase the protein content or made with cheap and inferior whey protein concentrate or caseinates. To make Pro JYM, we selected only the highest quality whey protein isolate, micellar casein, milk protein isolate, and egg white protein (egg albumin).

The 24 grams of protein in each scoop of Pro JYM contain the following:

  • Whey Protein Isolate: 7.5g
  • Micellar Casein: 7g
  • Egg Albumin: 2.5g
  • Milk Protein Isolate: 7g (5.5g Casein, 1.5g Whey)

Ratings & Reviews

System Stack 2 Lb. Pro
Overall Rating
43 Ratings
Verified Buyer Rating
7 Ratings
By clicking the button above, you agree to entering the Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Aug 24, 2019

I am currently using this stack along with vita Jym and if used in accordance with timeframe allotted by Jim Stoppani you will achieve maximum results. PS My favorite flavor for Protein is Rocky road by a mile.

Apr 17, 2017

I have been training for 21 years and these products are the best and most high performing products on the market today, I will never use anything else, only regret is not using them sooner,

Feb 15, 2017
Verified Buyer

Great product. Coincides with Jym workouts.

Feb 26, 2016

I just have a question about the stack. I noticed it has 2 Post workout products. Anyone know How its supposed to be taken? Should I take both after my workout?

Jan 04, 2016

I love the taste and ingredients on the stack. Yet Im wondering over the dyes that are added to the ingrediemts. Anyone else wondering about the dyes? I understand is for them to stick out but too much dye as any other food or drink is potentially bad. Anyone can give me a review on that.

Nov 04, 2015

10 is my product review, 8 is my stack review. Product: simple as this, I've not purchased another brand pre, post workout or protein since these were released. I've tried others which friends have me, but none convinced like Jym products. Stack: pre 20 serve, post 30 serve. Jim has since released 30 serve pre, so hurry up and stack this to bring in line with the post jym. This, I believe is for to address.

Nov 04, 2015
Verified Buyer

Best products ever!! Like no other

Nov 04, 2015

I have been using the Jym supplement science line since they came out . I love the way that every product works and does its job . $113 for the jym stack is way cheaper than most stacks that you will get at a vitamin shoppe it gnc .

Nov 04, 2015


Nov 03, 2015

Never fear the Jym Stack is here. 4 High grade quality products worth every penny. The Jym Stack is the perfect grouping of supplements ever created. I also add Vita Jym, Omega Jym & Shred Jym for even more amazing results, recovery & mental focus & toughness. Don't miss out or short change yourself. Get the best of the best right here. You will not regret the purchase & you will be a repeat user of these products for life. #JymArmy

Oct 27, 2015
No written review.
Oct 17, 2015

Best stack on the market. I've had better gains taking the Jym System and following his nutrition and workout programs. This stuff is for real.

Sep 30, 2015
No written review.
Jul 17, 2015
Verified Buyer

i could talk about each individual product being great but the one product out of this that was overwhelmingly great was the protein the taste of the chocolate cookie was amazing whenever i find myself craving food i automatically have jym pro just because it tastes amazing by far the best ive ever had and ive tryed just about every company out there

Jun 08, 2015
No written review.
Directions for System Stack 2 Lb. Pro: Follow the directions on the products' label.
Warnings: Read the warnings on the products' label.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
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