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MHP Probolic-SR


Muscle Feeder!*

New Protein Technology Provides 12 Hour Sustained Release!*








Probolic-SR’s patented 12 hour Sustained Release Micro-Feed Technology and superior Critical Five Amino Acid Score (CFAAS) have made this advanced supplement one of the most popular proteins on the market for years. The combination of this sustained release technology and the scientific balancing of enhanced CFAAS set a new standard in bio-efficiency and enhancing the anabolic effects of protein by giving you something no other protein can: A continual supply of the most critical amino acids including high levels of Glutamine†, Arginine and BCAAs for up to 12 hours to stimulate muscle growth, improve recovery and reduce catabolic muscle wasting.*

PROBOLIC-SR, the world’s first combination protein supplement of its kind, is formulated to provide fast, medium and slow releasing proteins in one advanced formula. The combination of these muscle building proteins provide for greater anabolic and anti-catabolic benefits than any other single protein supplement.*

Gym Tested, Research Proven

A recent landmark study confirms that consuming a blend of proteins as found in PROBOLIC-SR provides a fast releasing whey, medium releasing soy isolate and slow releasing casein, thereby supplying a prolonged delivery of amino acids to the muscles. This combination increases the “anabolic window” of muscle growth, making PROBOLIC-SR the superior protein for consumption following resistance exercise. If you’re looking for explosive muscular growth and maximum anabolic effects, you can count on PROBOLIC-SR!

  • Combination Protein Enhances Post-Workout Muscle Building*
  • Sustained Release Technology Fights Catabolic Muscle Loss At Night*
  • Up To 12 Hours of Protein Feeding *




“For all the hours I spend in the gym or on the field, the last thing I want is to lose muscle mass overnight while I’m sleeping. To avoid this catabolic nightmare, I drink a Probolic-SR shake every night before bedtime. Its sustained release keeps my muscles fed and growing all night long.”*

Pro Football Offensive Guard, -Team MHP




The results of a groundbreaking new research study suggest that a protein blend (a combination of whey, casein and soy) may be best to consume post-workout for building muscle. Specifically, the blend of proteins supported an increase in study subjects’ post-workout “anabolic window” (the amount of time it takes for building muscle to occur post-exercise). “This research study suggests that consuming a blend of proteins (soy, whey and casein) provides a prolonged delivery of amino acids to the muscles versus whey protein alone, making it optimal for consumption following resistance exercise,” said Dr. Blake Rasmussen of the University of Texas Medical Branch, who led the study.

It is well known that muscles don’t recover in 30 minutes post-workout. It takes at least 24-48 hours for your muscles to recover fully after resistance exercise. This clinical study suggests that protein blends can provide amino acid delivery for up to five hours, meaning if you consume a combination protein shake post-workout, the prolonged effect will deliver essential amino acids to help feed your muscles until your next meal.* This means that a combination protein blend such as that in PROBOLIC-SR may provide greater anabolic muscle building effects much longer than possible by using whey protein alone. It should also be noted that only Probolic-SR uses a patented Sustained Release Micro-Feed Technology to further extend amino acid release and anabolism.* To enhance its already powerful anabolic/anti-catabolic properties, only PROBOLIC-SR uses a patented Sustained Release Micro-Feed Technology to further extend amino acid release and anabolism for up to 12 hours.*

Patented Technology Increases Anabolic/Anti-Catabolic Effects for Enhanced Muscle Building!

  • Patented Sustained Release Technology Feeds Muscle for up to 12 Hours*
  • Superior Anabolic/Anti-Catabolic Matrix*
  • Good Anytime: Morning, Pre- and Post-Workout and Nighttime
  • High Levels of Glutamine, Arginine and Branched Chain Amino Acids – Known as The Critical Five Aminos

While many independent sports nutrition experts and pro-bodybuilders agree that a combination of different proteins is better than whey alone, there is even more to the history-changing Probolic-SR protein breakthrough.

This advanced bio-engineered protein utilizes patented technologies to help overcome protein’s natural limitations on nitrogen retention and muscle growth.* Probolic-SR has set new standards in protein quality, bio-availability and anabolic and anti-catabolic muscle building.


When MHP launched Probolic-SR, it revolutionized the industry and became our new gold standard in protein supplementation. Probolic-SR’s bio-engineered protein was designed to exhibit high bio-availability, amino acid levels and nitrogen retention for maximum anabolic effects to trigger greater muscle growth. Probolic-SR contains a scientifically balanced bio-engineered matrix of high quality muscle building amino acids from the finest quality whey, soy and casein proteins, developed to provide extra amounts of the vital muscle building critical anabolic amino acids.*

Additionally, Probolic-SR takes a quantum leap beyond other proteins by employing a 4 stage, 12 hour sustained release Micro-Feed Technology. This patented advanced technology provides your muscles with a bio-efficient steady delivery of protein to trigger muscle growth and support recovery day and night. MHP’s unique Micro-Feed Technology is perhaps the biggest development ever in protein supplementation. Other companies actually offered MHP large sums of money to relinquish this secret technology, but MHP isn’t interested in sharing our proprietary technology and we plan to keep this proprietary technology exclusive to Probolic-SR and our legion of bodybuilders and athletes who rely on MHP to help them meet their muscle building goals.*

All told, Probolic-SR’s technological advancements make it an extraordinarily effective and powerful muscle building agent. Probolic-SR’s anabolic and anti-catabolic properties go beyond other proteins.

Overcoming Protein’s Limitations to Enhance Muscle Growth!*

Protein’s limitations on achieving and maintaining the anabolic environment needed to augment large increases in muscle mass have been an enigma for the scientific community. If a positive nitrogen balance (from protein) is the needed anabolic stimulus for muscle growth, then why doesn’t consuming large amounts of high quality proteins like whey, casein, soy and egg produce the expected gains in muscle mass?

During MHP’s research effort into this question, our researchers analyzed virtually every known dietary source of protein for their Amino Acid Composition (AAC), Biological Value (BV), Protein Digestibility Correct Amino Acid Score (PDCAAS), Protein Efficiency Ratio (PER) and Rate of Absorption (RA)-the rate in which the protein releases amino acids. We also analyzed the amino acid composition of human muscle tissue and the effects of resistance training on nitrogen depletion and muscle tissue remodeling. We found that:

  • No single protein source in nature is capable of maintaining and sustaining positive nitrogen balance for exerting the desired anabolic effect for maximum muscle growth.*
  • No single protein source provides the optimal levels of key Critical Five Amino Acids (Glutamine, Arginine, Leucine, Isoleucine and Valine).
  • Whey protein can work best when combined with other proteins. While whey’s fast release rate is good for quick, post-workout replenishment, it’s not necessarily ideal for maintaining the maximum anabolic/anti-catabolic muscle building state. Whey combined with slower releasing proteins such as soy and casein is beneficial for creating better anabolic/anti-catabolic effects.*
  • Specially manufactured soy isolates have many unique anabolic properties with impressive bio-availability (a perfect score of 100) and high levels of key amino acids such as glutamine, arginine and BCAAs.
  • Casein’s slower release rate has better anabolic/anti-catabolic effects than whey to support sustained muscle growth and recovery and is another protein that when combined with whey and/or other proteins has even greater muscle building effects.

The Scientific Breakthroughs Behind Probolic-SR

With these findings, MHP researchers embarked on formulating Probolic-SR. The biggest challenges in bio-engineering a more powerful anabolic protein were altering the protein’s amino acid composition and controlling the release rate. It was evident that the only way to achieve the desired anabolic/anti-catabolic effects was to bio-engineer a protein utilizing a succinct combination and ratio of various protein sources and employ a special release technology to improve nitrogen balancing and modulation. First, by bio-engineering an advanced protein matrix delivering a complete profile of muscle building amino acids, high in the Critical Five Amino Acids, establishing new standards in amino acid scores; Second, the development of a patented sustained release delivery system, utilizing newly created micro-feed technology.

New Standards in Amino Acid Scores

The World Health Organization and protein manufacturers use a method known as PDCAAS (Protein Digestibility Correct Amino Acid Score). Protein manufacturers have been using this method to determine the value of their proteins and many proteins such as whey, casein, soy and egg all have perfect scores of 100. However, we note two major flaws with this method relative to bodybuilders and muscle growth. The first flaw is that this score is based on pre-school children’s protein needs. We know that an adult bodybuilder’s protein needs are far greater than a pre-school child’s. Perhaps an even bigger flaw is that this score only takes into account essential amino acids and does not include the very important “conditionally essential” amino acids arginine and glutamine. From MHP’s extensive research on evaluating proteins and muscle tissues amino acid composition, we determined that the five most important aminos for muscle growth in response to training are glutamine, arginine and the branched chain amino acids Leucine, Isoleucine and Valine. These amino acids provide the greatest anabolic response and are needed to support muscle tissue remodeling in response to heavy training. These 5 amino acids are what the protein industry is now calling the Critical Five and they are established as a new standard in measuring the value of a protein called the Critical Five Amino Acid Score (CFAAS). In the development of Probolic-SR, the MHP research staff developed a scientifically formulated protein matrix of whey, soy and casein to provide high levels of essential amino acids and yield the high levels of Critical Five Amino Acids. Probolic-SR balanced this matrix with free form isoleucine, leucine and valine making Probolic-SR a superior concentrate of the Critical Five Amino Acids.

Patented Micro-Feed Technology: The 12 Hour Muscle Feeder!

This pharmaceutical delivery system is designed to provide a continual supply of amino acids for up to 12 hours. The Micro-Feed Technology works similar to continually supply high concentrations of the Critical Five Amino Acids so that you can sustain an anabolic muscle building state and reduce catabolic muscle depletion. This technology helps achieve nitrogen-balancing modulation and also increases bio-availability.


Let us give you some information regarding protein’s true Biological Value, utilization and ability to maintain a positive nitrogen balance. The protein industry and scientists have been using Biological Value (BV) as a measure of protein quality. Many proteins such as whey and whole egg are given a perfect score of 100, which gives consumers the impression that every gram ingested is utilized. NOT SO — our findings found that these values are based on relatively low dose consumption (only 9-18 grams of protein) and does not take into account the protein’s digestibility and absorption rate. When larger doses are taken, such as 40-60 grams, the amount commonly consumed by bodybuilders, not all of the protein is utilized. Some of it is converted to the waste products urea and ammonia, and can even be converted to body fat. This helps explain why large dose protein consumption doesn’t necessarily produce the desired anabolic effects you might expect. The research also found that the varying release rates of proteins influence their Biological Value, utilization and ability to supply nitrogen. While the whey industry has done a good job trying to lead you to believe faster is better in terms of release rates, new studies show that slower releasing proteins can provide greater anabolic and anti-catabolic effects. Therefore, our research indicates that the ideal protein would provide fast, medium and slow release rates. It is important to realize that when it comes to building muscle, anti-catabolic properties are just as important as anabolic properties.

Exclusive 4-Stage Release Makes Probolic-SR the “Anytime” Anabolic Protein

Due to Probolic-SR’s unique sustained release delivery system, it quickly became the protein supplement of choice for pre-workout and nighttime use. But Probolic-SR can be actually be used “anytime”, due to its exclusive 4-stage time-phased delivery system. This unique blend of proteins provides a fast, medium and slow release of Amino Acids and is further prolonged with the patented Micro-Feed Technology! This advanced release profile supplies the needed quick release (0-2 hours) of amino acids for post-workout replenishment of nitrogen. It is also perfect for pre-workout because it’s medium and slower release (hours 2-6) will keep supplying aminos and help you in an anabolic state throughout your entire workout and prevent going into a catabolic state. It keeps delivering amino acids to your muscles for up to 12 hours. When taken before bedtime Probolic-SR’s Micro-Feed Technology will supply high levels of the Critical Five Aminos and help keep you anabolic all night! Probolic-SR will help ensure you don’t never slip into catabolism between meals, during workouts or during the night while you sleep and help keep you in “positive nitrogen balance” and anabolic overdrive!*



Protein is critical for anabolic muscle building, but your body requires more than just protein in the few minutes immediately following your workout for maximum growth and recovery. New Extra Potent DARK MATTER fuels muscles with insulinotropic amino acids, 10:1:1 ratio BCAAs and glutamine peptides to promote growth. Its advanced carbohydrate matrix of waxy maize and potato starch provides a powerful insulin spike, while the multi-phase creatine matrix maximizes muscle cell volumizing.* Every great workout ends with Extra Potent DARK MATTER!

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MHP Probolic-SR Purchase Information

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2 Lbs. $47.99 $26.78
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2 Lbs. $47.99 $26.78
Flavor Taste Availability  
Banana Cream
7.2 In Stock
8.7 In Stock
Cookies N' Cream
7.5 In Stock
6.1 In Stock
Triple Chocolate Cookie
In Stock
7.7 In Stock
4 Lbs. $83.99 $47.91
Flavor Taste Availability  
8.7 In Stock
7.7 In Stock
What's in MHP Probolic-SR?
2 Lbs.Banana Cream
Supplement Facts
Serving Size1Scoop(28g)
Servings Per ContainerApproximately 28
Amount Per Serving
Calories From Fat35
% Daily Value
Total Fat4g6%
Saturated Fat2g10%
Trans Fat0g
Total Carbohydrate2g1%
Dietary Fiber0g0%
Amino Acid Profile
Mg Per 100g Of Protein
Aspartic Acid11,130mg
Total Amino Acids104,020mg
Critical Five Amino Acids *as Glutamic Acid48,360mg
Percent Daily Values are based on a 2,000 calorie diet
Daily Value not established
Other Ingredients
Probolic Sustained Release Amino Acid Enhanced Protein Matrix [Supro Soy Protein Isolate (With Lecithin), Calcium Caseinate, And Whey Protein Concentrate, Branch Chain Amino Acid Blend (L-Isoleucine, L-Leucine, L-Valine)], Lipobolic Advanced Lipid Complex [Medium Chain Triglycerides Complex, Borage Seed Oil Powder (10% GLA), Conjugated Linoleic Acid Complex (78% CLA), Evening Primrose Seed Oil (4.8% GLA), Flaxseed Powder (8% ALA), Omega III Complex (7.5% EPA & DHA), Stearic Acid, Natural And Artificial Flavors, Gum Blend (Cellulose Gum, Xanthan Gum, And Carrageenan), Citric Acid, Silica, Lecithin, Acesulfame Potassium, Sucralose.
Contains Milk, Soy, And Fish.

Directions For Probolic-SR: Mix 1 to 2 scoops of Probolic-SR with 8 to 16 oz. of water in a shaker bottle or blender. Consume 2-3 servings a day or use as recommended by a physician or licensed nutritionist.

* 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.