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Ultimate Building Product! Promote Lean Muscle Gains!


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Ultimate Building Product! Promote Lean Muscle Gains!


Mass 550 is the most pivotal advancement in lean muscle acquisition ever introduced. MASS 550 contains two of the most innovative and exotic bodybuilding ingredients available today. The novel combination of Letrosterone and Maslinic acid creates an anabolic environment that promotes lean muscle growth, increased protein synthesis, and a reduction in overall estrogen in the body.

FINAFLEX introduces MASS 550 an intelligently designed bodybuilding product that produces unmatched results in lean muscle acquisition. MASS 550 combines two unique and novel ingredients with other proven compounds producing the most robust sports performance product ever created.


Letrosterone works to help reduce circulating androgens in the body that can covert into estrogen. Higher estrogen levels mean lower testosterone production in the human body. Reducing estrogen levels in the body allows athletes to maximize natural testosterone levels, boosting levels above their normal or baseline level.

MASS 550 is built with Letrosterone a potent natural ingredient gaining popularity as a sports supplement. Letrosteroneâ?¢ is a unique extract of Brassaiopsis glomerulata standardized for 10% dehydrololiolide and 20% n-benzoyl-l-phenylalanine methyl ester. Research has shown Letrosterone to posses effective anti-aromatase characteristics. Further research has isolated the existence of the two alkaloids dehydrololiolide and n-benzoyl-l-phenylalanine methyl ester that posses the anti-aromatase properties.

FINAFLEX chemists have worked for over two years to not only isolate the two alkaloids that make Letrosterone effective as a sports supplement but to find an extraction method that allows the percentage of these extracts to be increased from the plant. Over the last two years FINAFLEX chemists were able to increase the purity of Letrosterone up to 20 TIMES GREATER than the average Brassaiopsis glomerulata extracts currently being used by other sports nutrition companies. These results are verified by an independent 3rd party cGMP and DEA registered dietary supplement testing facility.


Imagine an ingredient that signals the body to increase protein synthesis, protein turnover, body mass, and muscle tissue all at once? Meet Maslinic acid, the naturally occurring ingredient that has a structure similar to steroid hormones and a proposed mechanism of action in cell signaling similar to testosterone. Maslinic acid has been shown in cell based studies and animal studies to produce a powerful anabolic effect by increasing whole body growth rate, regulating blood glucose, nitrogen retention, and increasing the synthesis of DNA and protein.


Protein turnover rate is the ratio of protein synthesis versus protein degradation. When your body is in an anabolic state (think growth state) you have more protein synthesis versus protein breakdown. If you have more protein breakdown than protein synthesis your body is in a catabolic state, literally destroying itself. In one recent study, Maslinic acid was shown to increase protein synthesis rate by more than 80%! This is exciting for all athletes looking to enhance sports performance.


MASS 550 contains D-Aspartic Acid (DAA), Fenugreek, and Vitamin D3, all heavily researched ingredients shown to increase baseline natural testosterone levels.

 FINAFLEX Mass 550


Note: Manufacturers continually change product specifications. While we try our best to keep product descriptions up to date, they do not necessarily reflect the latest information available from the manufacturer. We are not responsible for incorrect or outdated product descriptions and/or images.

FDA: 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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Nutrition Facts

Supplement Facts

Serving Size: 2 Capsules
Servings Per Container: 30

Amount Per Serving
Vitamin D3 1,600 IU 400%
Lean Mass Matrix 120mg
Letrosterone (Brassaiopsis glomerulata extract standardized for 10% dehydrololiolide and 20% n-benzoyl-l-phenylalanine methyl ester), Olive pomace oil (standardized for 70% Maslinic Acid), Naringin
Testosterone Matrix 550 mg
D-Aspartic Acid (DAA), Fenugreek (50% Saponins)(Seed)

Other Ingredients: Maltodextrin, Gelatin, Silica, Magnesium Stearate, Titanium Dioxide, FD&C Blue #1.


Directions: As a dietary supplement take 2 capsules 1-2 times daily with food. Take MASS 550 every day, including non-training days. Increase protein intake during cycle of MASS 550 to maximize lean muscle and strength gains. For extreme results use 2-3 bottles of MASS 550 consecutively over a 40-90 day period. Do not use MASS 550 for more than 90 days consecutively.

Consult your doctor prior to use if you have or are at risk for prostate disease, heart disease, or any other general medical condition. Consult your doctor prior to use if you are taking any other medications. Do not exceed suggested dosage. Discontinue use immediately if you experience rapid heart beat, dizziness, vomiting or other similar symptoms. All persons are advised to consult with their doctor or other medical authority before use of this or any other dietary supplement. CAUTION: Athletes or other persons who are subject to testing for performance enhancing drugs may test positive when using dietary supplements. All persons are advised to contact their drug testing organization prior to use of this or any other dietary supplement. May not be suitable for persons under the age of 18 years old.


FINAFLEX Mass 550 Reviews

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  • Solid product


    This is not strong as finaflex 1-alpha but works after time. A safe product that boost metabolism. Make sure you increase your intake of protein with this supplement for maximum results.

    Review by Guns (Posted on 10/10/2015) DISCLAIMER. Individual results may vary.

  • Mass 550


    Not as strong as 1-andro, but a lot cleaner formula. It took about 10 days before I started to notice changes in my strength and lean muscle gains.

    Review by Lift (Posted on 7/9/2015) DISCLAIMER. Individual results may vary.

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