Magnum Nutraceuticals

OPUS , 48 Servings Twister Pop

Instant Effervescent Workout Fuel!*
Our 1st "FEEL THIS IN MINUTES" Anabolic Energy Rush!*
8.3  out of 10  (144 Reviews)
Hot Deal! Save 25%
Order and automatically receive 25% Off!

Product Overview

Increase Muscle* Increase Energy* Increase Bloodflow* Delay Fatigue*

Magnum OPUS® creates an anabolic firestorm, causing incredible muscle growth. This groundbreaking formula sends strength levels off the charts by increasing blood flow and hydration of your muscles.* Opus lets you break through barriers by supercharging your energy levels, delaying fatigue and pushing muscle performance. You’ll feel it working instantly.*

  • Muscular Performance*
  • Cellular Energy*
  • Blood Flow*
  • pH balance*
  • Hydration*
  • Activate explosive gains in muscular growth*
  • Delay the onset of muscular fatigue*
  • Create new ANABOLIC FUEL*
  • Improve strength*
  • Break through new barriers of muscular performance*
  • Improve recovery*


High quality ingredients for better, faster results.

It is a 100% stimulant free energy source.*

It offers 16 of the most powerful and scientifically proven performance ingredients.*

It provides energy at the cellular level as opposed to over-dose stimulant products.*

A key ingredient in Magnum OPUS® is a neurotransmitter in the central nervous system and of major importance to the creation of protein, peptides and creatine.*

A key ingredient found in Magnum OPUS® is the patented Carnosyn®, which is the purest and highest quality Instantized Beta Alanine. CarnoSyn® activates enzymes responsible for generating muscle contractions and increases intra-muscular Carnosine, which is used by your type II muscle fibers for explosive movements like weight training and sprinting.*

CarnoSyn® Beta Alanine is a non-essential amino acid that is used by muscle cells to synthesize Carnosine. Carnosine is the dipeptide (Beta-Alanine plus Histidine) that functions as a buffer for the hydrogen ions (acid) produced during strenuous exercise, thus helping to maintain optimum muscular pH and prevent the acidity that occurs during exercise. Carnosine is found in large amounts in Type II or “fast twitch” muscle fibers, which are used in explosive movements like weight training and sprinting, a reduction in pH balance causes the muscle burn that you experience while doing high intensity training. Beta-Alanine acts as a precursor to Nitric Oxide (NO) production and works to reduce intra-muscular acidification created by this intense exercise and heavy training.*

A study posted in the Journal of the International Society of Sports Nutrition showed significant improvements in exercise performance when supplementing with CarnoSyn®.

Beta Alanine supplementation improves YoYo intermittent recovery test performance

Author: Bryan Suanders, Caroline Sunderland

Source: Journal of the International Society of Sports Nutrition 2012, 9:39

Seventeen athletes were subjected to the YoYoIR2 test following ingestion of either a placebo or 3.2g of CarnoSyn® a key ingredient dosed at this level in Magnum OPUS®. The YoYo IR2 is an exercise capacity test designed to last between 5 and 15 minutes and aims to evaluate an individual’s ability to perform repeated bouts of high-intensity exercise with a large contribution from anaerobic energy sources as well as aerobic energy systems.

Athletes in the placebo group showed a 7% decline in exercise performance while CarnoSyn® supplementation improved exercise performance by 34%.

Ntric Oxide. Nitrix Oxide Synthase
"Improvements can be attributed to an increase in muscle buffering capacity due to increased muscle Carnosine concentration, attenuating the decline in intramuscular pH during repeated high-intensity exercise bouts."

Train longer and harder without muscle soreness*

Magnum OPUS® raises your cellular pH levels; having an acidic pH not only causes lower muscle mass, but can also lower plasma levels of IGF-1. Having an acidic pH is not conducive to building muscle.A key ingredient that raises your cellular pH levels is Citrulline Malate.

Citrulline malate (CM) is the amino acid citrulline, which is involved in ammonia conversion, bonded to the organic Krebs cycle intermediary malic acid. Citrulline is heavily involved in the urea cycle in the kidneys, helping to remove the build-up of ammonia while being converted to arginine in the process, thus releasing nitric oxide (NO). NO is a second messenger in the body, helping promote blood flow and increase nutrient uptake, but bodybuilders know NO for its ability to produce skin stretching pumps. Citrulline increases bicarbonate re-absorption by the kidneys, helping buffer against any change in pH that ammonia build-up can cause during intense exercise such as weight training.*

A study posted in the Journal of Strength and Conditioning Research showed that supplementing with a single dose of Citrulline malate resulted in an amazing 52% increase in the number of reps performed. A decrease of 40% in muscle soreness at 24 hours and 48 hours after the pectoral training session and a higher percentage response than 90% was achieved with CM supplementation.

Citrulline Malate Enhances Athletic Anaerobic Performance and Relieves Muscle Soreness

Author: Pérez-Guisado J, Jakeman PM.

Source: “Journal of Strength and Conditioning Research” published May 2010

The randomized, double-blind study conducted on 41 men found that a single dose of CM decreased muscle soreness after exercise and significantly enhanced anaerobic activity. The men were able to do 52% more reps during pectoral training sessions, which included flat barbell bench press, and they also experienced a significant decrease of 40% in muscle soreness at 24 hours and 48 hours after the pectoral training session and a higher percentage response than 90% was achieved with CM supplementation.

Ntric Oxide. Nitrix Oxide Synthase
Citrulline Malate is also a great choice when looking to improve athletic performance and recovery, especially when combined with CarnoSyn®, as the two ingredients are central in raising intercellular pH levels to combat fatigue, allowing you to train longer and harder, while offsetting the soreness usually attributed to this new found training intensity.


Magnum OPUS® puts your body in an anabolic state from the first serving, ensuring that you are building, not burning, muscle whether you’re doing endurance activities or high intensity weight training.*

Magnum OPUS® is the first workout fuel that you feel in minutes without any stimulants. Magnum OPUS® enables you to train harder than ever before with no fear of losing muscle or energy production breakdown.*

A key ingredient that allows you to train harder without burning muscle tissue is L-Leucine. Leucine is a branched-chain amino acid, or BCAA, that is an essential source of energy for your muscles. Your body is unable to produce it on its own so it must be supplemented or obtained from food. Leucine can help your muscles recover and prevent muscle loss after exercise and also increase your endurance by increasing the fuel your muscles have to work properly and by preserving energy stores in your muscles. Leucine is the only dietary amino acid that has the capacity to stimulate muscle protein synthesis.*

A study posted in the European Journal of Applied Physiology documented the positive effects L-Leucine had on performance.

Effects of dietary leucine supplementation on exercise performance

Author: Crowe, Melissa; Weatherson, Jarrad; Bowden, Bruce

Source: European Journal of Applied Physiology, Volume 97, Number 6, August 2006 , pp. 664-672(9)

Thirteen competitive outrigger canoeists underwent testing before and after a 6-week training phase, using either L-Leucine or a placebo. They were assessed on their upper body power and the time it took to reach exhaustion while rowing at 70-75% of their maximal aerobic power. The results of the study were significant. During the 6-week phase upper body strength and power increased in both groups, however, power output increased significantly more (13%) in the L-Leucine group then the placebo. Rowing time also increased for the L-Leucine group, from a starting time of 6.3 mins up to 7.3 minutes, an increase of 16% where as the placebo group experienced no increase in their times.

Ntric Oxide. Nitrix Oxide Synthase Ntric Oxide. Nitrix Oxide Synthase
Leucine not only increases your body’s ability to build muscle and increase protein synthesis, but when combined with other endurance promoting ingredients, such as the key ingredients found in OPUS®, both anaerobic and aerobic performance may increase significantly.*

Who is in need of magnum opus?

Anyone who lifts weights or plays high intensity sports

Anyone who wants to increase their strength and muscular endurance - FAST*

Anyone who loses their pump before they’re done their workout*

Anyone trying to improve their endurance capacity*

Anyone looking for a scientifically validated nitric oxide product*

Anyone wanting to increase the effectiveness of every supplement they take*


  1. Build Muscle*
  2. Raise pH levels for more muscular endurance*
  3. To increase the rate at which our body produces energy while training and / or under stress.This is a true revolution, one in which we move away from stimulants and nervous energy, and look towards awe-inspiring workouts powered by OPUS’s® Anabolic Energy!*

Frequently Asked Questions

If Magnum Opus® is stimulant free, why do I feel so much energy?
The stimulant free ingredients in Magnum Opus® are clinically proven to energize your body on a cellular level – they create energy in your cells and fire you up to work hard!*
Will I feel the same kind of energy I get from my high-stimulant based pre-workouts?
NO! While you will feel energy on a cellular level, Magnum Opus® will not buzz you like the high-stimulant products.*
Why do my face and hands tingle when I take Magnum Opus®?
Magnum Opus® has a large dose of Carnosyn® - a patented, ultra-pure Beta Alanine. Beta Alanine is proven to improve blood flow and most people feel this increased blood flow in the form of tingles (primarily on their face and hands). Some people feel the tingles everywhere. This patented ingredient is also proven to increase strength, aerobic and anabolic endurance, and delay muscle fatigue.*
What is the optimal way to take Magnum Opus®?
We recommend on the bottle to take your dose minutes before training (as the ingredients in Magnum Opus® absorb instantly and will take effect instantly). If you weigh over 130 lbs, take 2 scoops and if you weigh less than 130 lbs, just take 1 scoop. However, if you train hard and weigh under 130lbs, don’t hesitate to go for the full 2 scoop dose.
How fast should I see results from Magnum Opus®?
Instantly! The Pharmaceutical Grade ingredients in Magnum Opus® kick in right away and many people have commented they feel energy and their face tingling before the cup even left their lips!! In case you don’t feel the tingles, you will feel the muscular energy and endurance within minutes.*

Ratings & Reviews

Overall Rating
144 Ratings
Verified Buyer Rating
36 Ratings
Average Flavor Rating
3 Flavors
Top Rated Flavor
Orange Dreamsicle
By clicking the button above, you agree to entering the Bodybuilding.com Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Nov 24, 2018

I absolutely love Magnum Opus! I mix with my Magnum Hi5 BCAAs when using it as an intra or after a long day at work I'll mix it with less water and do a shot for additional energy. Not only is it a great intra workout, it's the best for late night training sessions without having to worry about it impacting sleep! This product is not only a stimulant free intra/ pre workout drink it can also balance your PH levels, offsets muscle fatigue which means more reps, weight and pump!

Jun 07, 2018

Absolutely amazing taste and best intra-workout for energy I've ever tried. I love this because it's stim free so I'm able to use it for those late night workouts!

May 08, 2017
Verified Buyer

One of the best intra workouts ever and also works as a decent pre workout. Hands down the best swell ive had from any workout formula, plus increased performance.

Dec 04, 2016

Ok, so I mentioned that my Limitless was a weird flavor, wait till you taste "Blue Yasberry". I literally can not describe it at all...lol. When I asked for this flavor, I read Blue, saw Yasberry and thought Raspberry...lol. So, what color is BLUE Yasberry? ORANGE!! When I took it, I did the 2 scoops in 16 oz of water. While shaking it up, I could feel pressure building my my bottle. So I would release the air in-between shaking. It mixed up very well. I feel that when using Opus as an Intra drink, it also helped Limitless keep the energy levels up. There is 3.2g of Beta Alanine in it, but did not really notice it. Mixability - 10/10. No residue at all in my bottle. Flavor - 9/10. I really wish I could describe it...lol. Was berry good tho...lol Perfomance - 9.5/10. With the both together, this made it all better.

Oct 31, 2016

Opus is my boyfriend! Lol But seriously folks...this is such an awesome intra workout! I actually drink it 50/50 mix with my HI5! I mix the flavors so I get crazy combinations! Strawberry HI5 and Orange Dreamsicle Opus is the best! I love how it gives me steady energy, increases my PH and gives me huge strength and endurance gains! I just started adding DNA in my growth stack and they are teaming up nicely and I'm getting gainz!!!!

Aug 08, 2016

I absolutely love Magnum Opus! I currently use it mixed with my Magnum Hi5 BCAA's. It is not only great for intra workout drink you can also use it for late night training sessions for a pre workout and not have to worry about falling asleep! Definitely always in my arsenal of products! This product is not only a stimulant free intra/ pre workout drink it can also balance your PH levels, offsets muscle fatigue which means MORE reps, MORE weight and MORE pumps!!!

Apr 10, 2016
Verified Buyer

The "anabolic rush" you get is the B-vitamin skin burning sensation. You can take 2 capsules of Niacin and get the same effect. That aside... The flavor tastes like fruit soda gone flat. I ended up having to mix it with other stuff to get past that flavor. I like that it doesn't have caffeine in it, but I probably won't buy it again. P.S. Am I the only one tired of supplement and protein marketing with all the silly hype descriptions like, "Super Nitro Anabolic Rush from our patented Triple-Engineered Muscle-Building Molecules."

Mar 10, 2016
Verified Buyer

One word - INSANE! I am a big user of stimulant pre-workouts but for my late night workouts I didn't want to take anything that would keep me up all night. I worried about taking a pre-workout that wasn't high in stimulants seeing as I felt I would be lacking that "killer instinct" in the gym. Boy was I wrong with Opus! I was energized and ready to go to work but after my workout I didn't find that I "crashed" like some pre-workouts cause. I was able to go home eat and sleep peacefully that night. The flavor is delicious too! Sometimes I drink it during my workout as well to keep my pumped up the entire time.

Feb 12, 2016

Wow, can't say enough about how great of an intra-workout supplement this is. I was blown away by all of the ingredients it contained but it definitely helps me push even further & harder during my workouts. It does make my water bottles a bit carbonated though so when I mix the powder and shake it, I have to let some of the air out of the bottle for fear of it expanding too much. I used two scoops during my workouts and drank them spaced out over the entire session and loved how it helped my performance.

Nov 05, 2015

Orange Dreamsicle is the best tasting flavour out there. You will never go back to drinking soda, after you try this. It it that delicious and you'll get addicted. I tried it pre-workout when I was taking a break from stims. You get that clean focus as soon as you sip it! That's the best thing about this product. It also delivers crazy pump and endurance. Opus stacked with Limitless intra-workout or a pre-workout of your choice, will delivery the best pump and endurance during the workouts... making you look full and go rep after rep and set after set without burning out. I highly recommend this product and you won't be disappointed!

Oct 22, 2015
Verified Buyer

OPUS is something I've used on and off for a few years now. It's much different from your typical BCAA / intra workout supplement. It contains a unique mix of other amino acids, ergogenic aids and hydration agents to help you grind out those all important final muscle-building reps. Their new dreamscicle flavor reminds me a lot of orange Fanta. OPUS is slightly effervescent and that fizziness mixed with the slightly tart orange is delicious! The finishing note is slightly like whipped cream instead of vanilla ice cream. I like that as that finishing note is clean instead of too sweet, which can easily happen when mixing orange and cream flavors.

Oct 06, 2015

First off, let's talk about how amazing the new flavor of Opus, Orange Dreamsicle, tastes! It is so light and refreshing! I can't get enough! If for no other reason, Opus is worth buying just to sip on and enjoy! However, it is also a well-formulated intra-workout! At two scoops, Opus delivers solid doses of leucine, beta-alanine, citrulline, and lots of electrolytes and a few other amino acids! This formula definitely enhanced my physical energy in the gym and helped me take my lifts to the next level! Opus also helped enhance my pumps and vascularity during workouts, especially when stacked with Limitless. The tingles from beta-alanine are strong from this combination, but I love the tingles, and they are definitely worth the bump in endurance that accompany them! I also loved the instant effervescence of Opus. It is my favorite thing when I have a drink that fizzes! So exciting! I definitely encourage others to try out Opus! Look out for the Orange Dreamsicle when it comes to bb,com! Profile: 9/10 Taste: 10/10 Effect: 10/10

Sep 29, 2015
Verified Buyer

Quality supplement as usual. As I am on a stim break this helps me get through my workout and I really like the flavor. I would love it if they include the grape flavor from Limitless in OPUS.

Sep 17, 2015

I've used OPUS many times. I've tried Blue Yasberry before, and absolutely loved the flavoring. I more recently tried Orange Dreamsicle, and let me tell you it is AMAZING! Can't wait for that flavor to come onto BB! As far as the preworkout itself goes, it is PERFECTLY dosed. I couldn't ask for anything more. This is a great product that consistently hypes me up for the gym. Without containing caffeine, OPUS is a great product to use during a stimulant break, or to use in a combination with a stimulant product. This product will give you the kick you need to increase your intensity during workouts, and you will not experience any sort of crash (as there are no stimulants). If you're looking for a new stim-free Preworkout, here it is!

Aug 27, 2015

I tried this as a new approach to approach to gaining energy and making it last with focus. Unfortunately the products didn't meet up to my vigorous expectations. I play on semi-professional to professional level tennis where energy, focus and stamina are keys to winning. Taking Opus in this scenario didn't give me any energy/focus or stamina during my 2-3 hour tennis matches that are very intense when competing provincially and nationally. It may work for others but not for me and will try a different products. I would have liked to get a refund if not satisfied but that is not given. Unfortunately I spent $50 on the store who recommended it but she said it's a trial and error. I told her those are costly mistakes so next time I'll do my homework more. I found another products that replaces electrolytes like Opus does same size container for $19.99 vs the $50 I paid for Opus. Next time something this pricey I will ask for samples first and see if they really works. Hope this review was helpful. I kept detailed notes of my performance when using it and it felt both more than a placebo. Cheers.

1 Size
48 Servings
Choose a Size
{{group.violatorText}} {{group.name}}
1 Flavor
Twister Pop
Choose a Flavor
Flavor Rating: {{sku.flavorRating | flavorRating}}
Save 25%
Was:  $39.68
Was:  {{vm.group.strikePriceDisplay}}
Price: $29.76  ($0.62 / Serving)
Flavor Rating:
Our 1st "FEEL THIS IN MINUTES" Anabolic Energy Rush!*

What's in Magnum Nutraceuticals OPUS

Serving Size: 9.25g (1 level scoop)
Servings Per Container:48
% Daily Value
Vitamin B1 (as Thiamine) .7 mg 47%
Vitamin B2 (as Riboflavin) .25 mg 15%
Vitamin B6 (as Pyridoxine) 5 mg 250%
Vitamin B12 (as Cyanocobalamin) .5 mcg 8%
Pantothenic Acid 2.5 mg 25%
Calcium 288 mg 29%
Sodium 190 mg 8%
Potassium 15 mg <1%
L-Leucine 2 g
Beta Alanine 1.6 g
L-Citrulline Malate 1.5 g
Glycine 1.25 g
Sodium Bicarbonate 400 mg
Calcium Bicarbonate 250 mg
Citric Acid 50 mg
Alpha-Ketoglutarate 50 mg
Malic Acid 50 mg
Fumaric Acid 50 mg
Succinic Acid 50 mg
Sodium Phosphate 19.38 mg
Potassium Phosphate 13.47 mg
Dicalcium Phosphate 3 mg
Magnesium Phosphate 1 mg
† Daily Value not established
Other Ingredients:
Artificial fruit punch flavor, Sucralose, Silicon Dioxide, Calcium Silicate

Directions For OPUS: Recommended Dose (Adults): Take 1-2 scoops daily 5-15 minutes prior to training or add it to your water bottle and drink while you train. Directions: Mix 1-2 scoops in 12-16oz of water.

Warnings: Do not use if you are under 16 years of age, pregnant, or nursing. Consult your physician before use if you have a medical condition or are taking any prescription drugs.

* 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.
Learn more about Beta-Alanine.
Check out other Improve Workout Products.