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Mass 550

product on market Capsule FINAFLEX Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 33% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · methodology

Vitamin D3 is supported by strong evidence for bone health and immune function. The Lean Mass and Testosterone Matrices contain proprietary blends with limited clinical evidence regarding their efficacy for muscle growth. Overall, the evidence coverage for this specific ingredient profile is very low.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for Mass 550
Open Full PDF View on NIH DSLD →
Details

Label Data

2 Capsule(s)
Serving Size
30
Servings
Other Combinations
Product Type
33%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

1600 IU (400% DV)
2.7× RDA — within safe limits 608 studies (A:16, B:251)
Lean Mass Matrix
120 mg
Testosterone Matrix
550 mg

Other Ingredients

Maltodextrin Gelatin Silica Magnesium Stearate Titanium Dioxide FD&C Blue #1
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested use: As a dietary supplement take 2 capsules 1-2 times daily with food. Take Mass 500 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.

Warnings & Precautions

Do not use Mass 550 for more than 90 days consecutively.

Warning: Keep out of reach of children.

Do no use if pregnant or nursing.

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 prescription medications. All persons are advised to consult with their doctor or other medical authority before use of this or any other other dietary supplement. Warning: Discuss possible interactions and contradictions of this dietary supplement with other medicines currently prescribed by your doctor.

Discontinue use 2 weeks prior to surgery. Do not combine this product with alcohol. Do not use if your health status is unknown. 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.

Formulation Notes

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.

Built with Letrosterone

Additional Information

Xtreme Anabolic Matrix

Sport performance Ultimate bodybuilding product Promote lean muscle gains Increase protein synthesis Reduce estrogen levels Boost testosterone 30 servings

Metadata

Product Details

UPC / SKU6 89466 67022 6
DSLD Entry Date2018-06-25
Product TypeOther Combinations
FormCapsule
DSLD ID178078
Data Updated2026-04-11
Research

Research Evidence

872
Research Sources
53
Avg Quality
309
Meta Analysis
309
Clinical Trial
111
Rct
71
Systematic Review
55
Guideline
4
Cochrane Review
4
Regulatory Source
2
Other
2
Narrative Review
2
Observational
1
Openfda Safety
A Vitamin D and vitamin D analogues for preventing fractures associated with involutional and post-menopausal osteoporosis
Meta Analysis The Cochrane database of systematic reviews 2009 PubMed DOI
A Vitamin D supplementation for prevention of mortality in adults
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
A Vitamin D and vitamin D analogues for preventing fractures in post-menopausal women and older men
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
A Vitamin D supplementation for prevention of cancer in adults
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
A Interventions for preventing falls in older people in care facilities and hospitals
Meta Analysis The Cochrane database of systematic reviews 2018 PubMed DOI
A Drugs for preventing lung cancer in healthy people
Meta Analysis The Cochrane database of systematic reviews 2020 PubMed DOI
A Vitamin D supplementation for prevention of mortality in adults
Meta Analysis The Cochrane database of systematic reviews 2011 PubMed DOI
A High prevalence of vitamin D deficiency in Asia: A systematic review and meta-analysis
Meta Analysis Critical reviews in food science and nutrition 2023 PubMed DOI
A The effect of vitamin D supplementation on depressive symptoms in adults: A systematic review and meta-analysis of randomized controlled trials
Meta Analysis Critical reviews in food science and nutrition 2023 PubMed DOI
A Interventions for preventing falls in older people living in the community
Meta Analysis The Cochrane database of systematic reviews 2009 PubMed DOI
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.