Msten Extreme Mass Builder Ingredients & Drug Interactions
by Assault Labs
What is this page for?
First and foremost: checking Msten Extreme Mass Builder against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.
Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy
Msten Extreme Mass Builder is a dietary supplement by Assault Labs with 1 active ingredient. Its ingredients are commonly taken for muscle building (bodybuilding), strength gains, body recomposition.We don’t currently list a known drug interaction for its mapped ingredients — but that doesn’t guarantee none exist, so always confirm with your pharmacist.
HelloPharmacist Scorecard of Msten Extreme Mass Builder by Assault Labs
Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.
What’s inside
Full disclosure
This product contains one active ingredient: methylstenbolone, a synthetic anabolic steroid (a lab-made compound that mimics testosterone and related hormones). The capsule also holds inactive ingredients including microcrystalline cellulose, gelatin, and several other fillers and binders.
Does it work?
Couldn't assess
The evidence we hold does not establish that methylstenbolone works for athletic performance, muscle strength, sexual arousal, erectile dysfunction (ED), or obesity. All of these uses are rated as having insufficient reliable evidence to rate.
How safe is it?
Well-documented data
Methylstenbolone is an unapproved synthetic anabolic steroid linked to serious liver and hormonal harm. It is possibly unsafe when taken by mouth, with concern for heart disease and liver injury.
One documented case involved severe liver damage (cholestatic jaundice with elevated liver enzymes, dark urine, clay stools, and itching) in a 26-year-old male who took a product containing methylstenbolone at the recommended dose for about a month; liver function gradually improved only after stopping the product. Anabolic steroids must not be used during pregnancy or while breastfeeding because of potential harm to a developing baby or nursing infant.
Meds to double-check
No known interactions
No interactions are documented in our data for methylstenbolone. However, the serious safety profile of this unapproved anabolic steroid — including risk of liver injury and hormonal disruption — is the primary concern before taking it.
The bottom line
Scorecard at a glanceFully disclosed formula with no assessable stated purpose. No medication interactions are currently documented, and safety information is well characterized.
This is an unapproved synthetic steroid with documented risk of serious liver injury and hormonal harm. We do not have evidence it works for any of its marketed uses.
Because of the severity of the safety concerns, you should talk with your doctor or pharmacist before considering this product — not just about interactions, but about whether it's appropriate for you at all.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Dec 22, 2019.
This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed
General information
Key facts about Msten Extreme Mass Builder, straight from the product label.
| Brand | Assault Labs |
|---|---|
| Net contents | 120 Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Dec 22, 2019 |
| DSLD ID | 209860 |
| Product type | Other Combinations |
| Supplement form | Capsule |
| Dietary claims / uses | No Claim |
| Intended target group(s) | Adult (18 - 50 Years) |
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.
Supplement Facts
The label details for Msten Extreme Mass Builder by Assault Labs, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Methylstenbolone 2,17a-dimethyl-5a-androsta-1-en-17b-ol-3-one | 4 mg | -- |
Other ingredients: Hypromellose, Stearic Acid, Magnesium Stearate, Silicon Dioxide, Microcrystalline Cellulose, Gelatin
Tap any ingredient to jump to its full detail below.
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
FDA Statement of Identity
Dietary Supplement
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Msten Extreme Mass Builder by Assault Labs label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.
View the full label (PDF)The Ingredients in Msten Extreme Mass Builder by Assault Labs
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1 Capsule(s) Dosage formCapsule Servings per container120 Amounts shown are per serving.
Methylstenbolone 2,17a-dimethyl-5a-androsta-1-en-17b-ol-3-one
No knowninteractions
Methylstenbolone is a synthetic, oral anabolic-androgenic steroid that has been sold in some 'prosteroid' or 'designer supplement' products, not a nat...
Methylstenbolone 2,17a-dimethyl-5a-androsta-1-en-17b-ol-3-one monograph & interactionsOther (inactive) ingredients: Hypromellose, Stearic Acid, Magnesium Stearate, Silicon Dioxide, Microcrystalline Cellulose, Gelatin. These complete the product’s ingredient list but are not active constituents.
Msten Extreme Mass Builder by Assault Labs Drug Interactions
We don’t currently list any known drug interactions for the mapped ingredients in Msten Extreme Mass Builder. This doesn’t guarantee none exist — always confirm with your pharmacist before combining a supplement with your medications.
Brand information
Manufacturer and brand details for Msten Extreme Mass Builder, from the product label.
Msten Extreme Mass Builder by Assault Labs: Common Questions
Does Msten Extreme Mass Builder by Assault Labs interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Does methylstenbolone actually build muscle?
Is this safe to take?
Can I take this if I'm pregnant or breastfeeding?
Will this interact with my medications?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Msten Extreme Mass Builder is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.
The Full Monographs Behind Msten Extreme Mass Builder’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Msten Extreme Mass Builder's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.
The 2 references behind this product’s interaction data
Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.
Methylstenbolone 2 references
- Joseph JF, Parr MK. Synthetic androgens as designer supplements. Curr Neuropharmacol. 2015;13(1):89-100. PubMed
- Agbenyefia P, Arnold CA, Kirkpatrick R 3rd. Cholestatic jaundice with the use of methylstenbolone and dymethazine, designer steroids found in super DMZ Rx 2.0 "Nutritional Supplement": A case report. J Investig Med High Impact Case Rep 2014;2(2):232470961 PubMed
Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
© 2021 Therapeutic Research Center, LLC