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Zionova Proviron
Mesterolone · 50 tablets
5.03 reviews$126.00CAD$2.52 per tablet · $0.13 per mg
Buy Zionova Proviron (Mesterolone) online in Canada. Pharmaceutical-grade oral steroid for anti-estrogenic oral that enhances free testosterone, improves libido, and adds muscle hardness. Order from SteroidsCanada.is – lab-tested purity, discreet packaging, and fast delivery across Canada.
Free shipping on orders over $300 CAD. Add $174 more with this item to qualify.
Delivery guaranteed: lost or seized, we reship your order free. Delivery policy
It ships by Canada Post Xpresspost with tracking.
- Ships from inside Canada
- Plain, unbranded box
- Pay by Interac e-Transfer
- Lost or seized: reshipped free
Spec sheetMesteroloneZionova · ZionovaProviron
- Compound
- Mesterolone
- Strength
- 20 mg per tablet
- Pack
- 50 tablets
- Total per order
- 1,000 mg
- Form
- Oral tablet
- Half-life
- About 12 hours
- Value
- $0.13 per mg
01The basics
What Zionova Proviron is
Proviron is Bayer’s brand name for mesterolone, an oral androgen derived from DHT. Each Zionova tablet contains 20 mg, with 50 tablets per bottle. It’s been prescribed since the 1960s in some countries for low testosterone and certain kinds of male infertility.
Unlike most oral steroids, mesterolone isn’t 17-α-alkylated, so it’s much easier on the liver. It’s a weak builder of muscle; people use it mainly as a support compound for libido, hardness and to free up more testosterone. Here’s what the evidence supports, and what it doesn’t.
02Molecule
The molecule
What is actually in the vial or tablet, from the public chemistry databases of the U.S. National Library of Medicine.
03How it works
How it works
Mesterolone is DHT with a methyl group at the 1-position, which lets it survive digestion without the liver toxicity of 17-α-alkylated orals.
- Strongly binds SHBG, the protein that holds testosterone in the blood, which may leave more of your testosterone free and active.
- Weakly anabolic: it’s broken down quickly in muscle tissue, so it adds little size on its own.
- No estrogen conversion. It’s often described as an anti-estrogen, but evidence for a real aromatase-blocking effect in people is weak.
Its half-life is about 12 hours.
04Half-life
Half-life, in plain numbers
A half-life of about 12 hours means half of what is in the body is gone after that time, then half of the rest, and so on. For a tablet this is mostly about how fast the liver clears it; food and the person change it a little.
- One half-life
- 12 h
- About 97% gone
- 2.5 days
- Levels level out with regular use after
- 2 days–2.5 days
A textbook model built from the half-life alone. Real numbers vary from person to person.
05Clinical reference
Dosing information
Clinical reference. Where Proviron is prescribed for low testosterone, the usual adult dose is 25 mg two or three times a day at first, reduced to 25 mg once or twice a day for maintenance.
One Zionova tablet is 20 mg. Every risk on this page rises with dose. Talk to a doctor before use.
06Measure it
Measure it
Type in the amount your prescriber gave you, or the one you are working from, and this turns it into what to draw up or count out from this exact product. It only does the arithmetic; it never suggests an amount.
Result
—
Enter your amount
- —
- —
Arithmetic from the strength printed on this product. Always check your own vial or bottle, follow your prescriber, and ask a pharmacist to show you how to measure if you are unsure.
07Risks
Side effects and risks
Mesterolone is milder than most steroids, but it’s still a potent androgen.
Hair loss
As a DHT derivative, it can speed up male-pattern baldness in prone men.
Prostate
It may enlarge the prostate or raise PSA, which matters more with age.
Acne and oily skin
Common in people prone to them.
Cholesterol
HDL can fall, adding to the effect of other steroids.
Suppression at higher doses
At low clinical doses it suppresses natural testosterone less than other androgens, but higher doses still do.
Don’t use it if you
Are under 18, a woman (virilization risk), have prostate or breast cancer, an enlarged prostate, liver tumours, or are already losing hair and want to keep it.
08Interactions
Interactions
Medicines and substances that change how this product behaves, or that it changes. Show this list to your pharmacist along with everything else you take.
- CautionWarfarin and other blood thinners
Like other androgens, mesterolone can strengthen warfarin’s effect; INR needs watching.
- CautionInsulin and diabetes tablets
Blood sugar may fall, so diabetes medicines may need changing.
- Good to knowLiver
Mesterolone isn’t 17-alpha-alkylated, so it is far easier on the liver than most oral steroids.
09Bloodwork
Bloodwork checklist
Test before you start and after 4–6 weeks.
- PSA (especially over 40)
- Testosterone, SHBG, LH, FSH
- Lipid panel
- Liver panel
10After a course
Where it fits
Proviron isn’t a PCT drug and doesn’t restart natural testosterone. During a cycle, it’s used as a support compound; after a cycle, recovery relies on SERMs such as tamoxifen (Nolvadex) or clomiphene (Clomid). See Pairs well with below.
11Pairs well with
Pairs well with
12Delivery
Delivery across Canada
Everything ships from inside Canada, so there is no border, no customs and no currency conversion.
Canada Post Xpresspost$30Free on orders over $300
Purolator / FedEx$60Courier option at checkout
- DispatchOrders ship by Canada Post Xpresspost, with tracking within 72 hours of payment. Customers commonly report 2 to 4 days to arrive, depending on the province and postal code.
- PackagingA plain outer box with no product names or branding.
- Delivery guaranteeIf a parcel is lost or seized in transit, we reship it free. Delivery policy
- ReturnsBecause of what these products are, opened or delivered orders can’t be returned. A wrong item is replaced free.
- PaymentInterac e-Transfer, priced in Canadian dollars.
13Questions
Common questions
Is Proviron liver-toxic?
Much less than most orals. It isn’t 17-α-alkylated, so it doesn’t carry their liver strain, though a liver panel is still sensible.
Does Proviron block estrogen?
It doesn’t convert to estrogen, and it’s widely described as anti-estrogenic, but strong human evidence for that is lacking. It isn’t a substitute for an aromatase inhibitor when estradiol is truly high.
Will Proviron build muscle?
Not much on its own. It’s broken down quickly in muscle tissue, so it’s mainly used for its androgenic and SHBG effects.
How fast is shipping in Canada?
Orders ship by Canada Post Xpresspost, with tracking within 72 hours of payment, with tracking.
Is Proviron legal in Canada?
Mesterolone is an anabolic steroid, listed in Schedule IV of the Controlled Drugs and Substances Act. Possessing it for personal use isn’t an offence; trafficking, importing and exporting without authorization are.
How is my order packaged?
In a plain, unbranded box with no product names on the outside.
14Research
Research behind this page
The studies and guidelines the clinical and safety information above leans on. Every link opens the record on PubMed.
- 1Mesterolone and idiopathic male infertility: a double-blind study. World Health Organization Task Force on the Diagnosis and Treatment of Infertility
Int J Androl1989WHO Task ForcePMID 2680994
- 2Androgens versus placebo or no treatment for idiopathic oligo/asthenospermia
Cochrane Database Syst Rev2000Vandekerckhove P et al.PMID 10796496
15Reviews
What customers say
5.03 ratings
- 5 ★3
- 4 ★0
- 3 ★0
- 2 ★0
- 1 ★0
JamieVerified order ·
SteroidsCanada.is replied
Thanks for the five stars, Jamie! We're glad your Zionova Proviron order came through well. We appreciate you choosing us.
JaredVerified order ·
SteroidsCanada.is replied
Five stars, thank you, Jared! We appreciate you ordering the Zionova Proviron from us.
Eddie M.Verified order ·
SteroidsCanada.is replied
We really appreciate the five stars, Eddie! Thanks for trusting us with your Zionova Proviron order.
After your order is delivered we email you a link to review it.
Educational information only, not medical advice. Talk to a doctor or pharmacist before using any anabolic steroid, hormone, peptide or prescription drug. Adults 18+ only. Sold and shipped from Canada by SteroidsCanada.is.