MHP Customer Support: 1.888.783.8844 | Hours: Monday - Friday 9:00AM - 6:00PM EST.
PROBOLIC-SR - Sustained Release Protein!


Sustained Release Micro-Feed Technology
Pre-Workout, Post-Workout and Before Bedtime
High Levels of the Critical 5 Amino Acids
Rich in Energy Stimulating Fatty Acids


12 Hour Sustained Release – Keep Your Muscles Satisfied!


Probolic-SR’s patented 12 hour Sustained Release Micro-Feed Technology and superior Critical Five Amino Acid Score (CFAAS) has been one of the most popular proteins on the market for years. The combination of this 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 prevent catabolic muscle wasting.


Current research shows that while whey protein has definite advantages, so do casein and soy proteins. But rather than making protein powder choices more confusing than ever for the bodybuilder, it’s actually easier to ensure that you get the most from your protein powder. Just choose all three – whey, casein and soy protein powder – before and after workouts, between meals and any time that calls for a protein shake.”
– Muscle & Fitness

Probolic-SR represents a major scientific advancement in protein supplement technology. The sophisticated protein/amino acid matrix and patented sustained release micro-feed delivery system offers athletes a hi-tech solution to improve their bio-efficient protein intake.”
– Daniel Gastelu, M.S., Training and Nutrition Expert, Author of the 2007 Bodybuilding and Sports Supplement User’s Guide

When I switched from taking whey to Probolic-SR, I immediately felt its superior anabolic effects. My muscles are bigger, harder and fuller than ever before. I also recover much faster. This allows me to train heavy and hard every workout.”
– Victor Martinez 2007 Arnold Classic Champion

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- The Critical Five

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.

As Glutamic Acid


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 its medium and slower release (hours 2-6) will keep supplying aminos and keep 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!

2lb - Vanilla
2lb - Triple Chocolate Cookie
2lb - Strawberry
2lb - Cookie & Creme
2lb - Triple Chocolate Cookie
2lb - Banana
4lb - Vanilla
4lb - Triple Chocolate Cookie
What are the benefits of Probolic-SR?

Helps maximizes muscle growth, speeds recovery and prevents catabolic muscle wasting by increasing protein synthesis and nitrogen retention.

How does it work?

Active Ingredients:

• Contains a 4 Stage Release Profile in order to continually feed muscle tissue for up to 12 hours:

Stage 1: Whey protein provides a high quality, fast releasing protein that feeds muscle tissue immediately and lasts for approximately 2 hours.

Stage 2: Soy Protein Isolate provides a high quality, medium speed releasing protein so you continue to supply your muscles with critical amino acids when whey is no longer found in the blood.

Stage 3: Casein protein:
provides a high quality slow releasing protein so you continue to supply your muscles with critical amino acids when whey and soy isolate protein are no longer available.

Stage 4: Patented Micro-Feed Sustained Release Technology microencapsulates a portion of the protein blend and slowly releases it into the blood over a period of up to 12 hours. This ensures that muscle tissue is being fed the critical amino acids needed to maintain an anabolic muscle building environment.

Glutamine: The most abundant amino acid found in muscle tissue, glutamine makes up approximately 60% of all muscle. Glutamine levels are rapidly depleted during exercise and if adequate levels are not in the body, muscle breakdown and loss can occur.

BCAAs (Branched Chain Amino Acids: Leucine, Isoleucine and Valine): The next most abundant amino acids found in muscle tissue and make up approximately 33% of all muscle. BCAAs are heavily catabolized (broken down and used for energy) during exercise. If adequate amounts of BCAAs are not available during exercise, your body uses valuable muscle tissue for fuel. By maintaining optimal levels of BCAAs through supplementation, you can protect muscle, improve recovery and endurance and maximize muscle growth.

Arginine (Nitro loading):
Increases Nitric Oxide production, which is the muscle’s “cell-signaling” molecule responsible for blood flow (hemodilation), oxygen delivery, nutrient delivery and uptake (amino acids and glucose), muscle velocity, power output and muscle growth . The increased blood flow can help supply more protein and nutrients to your muscles for increased size, fuller and thicker muscles, full body pumps, strength, vascularity and improved recovery.

Who should take it?

Anyone who is looking to maximize muscle growth, speed recovery and prevent catabolic muscle wasting by increasing protein synthesis and nitrogen retention.

How should I take it?

Mix 1-2 scoops with 8-16 oz of water. Mixes instantly in shaker bottle or glass. For a thicker shake, blend with ice for desired consistency.

Did you know?

Because of Probolic-SR’s unique fast-medium-slow and 12 hour extended release profile that it may be taken anytime – pre-workout, post-workout and before bedtime.


*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease.

Available Flavors
  • Triple Chocolate Cookie
  • Vanilla
  • Cookies n’ Cream
  • Banana Cream
  • Strawberry
Available Sizes / Price
  • 2lb Bottle $41.99
  • 4lb Bottle ( Vanilla & Chocolate Only) $71.99
Helps You With…
  • Bodybuilding
  • Fitness
  • Strength
“Just wanted to let you know that I’m impressed with your product! This is the first time I’ve used protein powder in several years and your product is far superior to what I used to use. Keep up the good work!”

Jim Carl, GA


This Product Stacks Well With

  • Anadrox Whitebg

    Anadrox – Pump & Burn

    • Maximum Muscle Fiber and Expansion
    • VasoThermic Fat Loss Activators

  • Bcaa Whitebg3

    BCAA 3300

    • Super-Anabolic BCAA Formula
    • 4 : 1 : 1 Leucine Loaded

  • Cyclin Whitebg


    • Helps Optimize Testosterone and Metabolism
    • Induces Deep Anabolic REM Sleep Patterns

Related Products