Dianabol Side Effects: Liver, Heart and Hormones (UK Guide)

✅ Medically reviewed by Dr. Joseph Nightingale, MBBS, MSc — Updated August 2026

Written by Tanveer Quraishi · Fact-checked against NHS, NIDDK and gov.uk guidance · Last verified: August 2026

Most articles on this topic lead with acne and bloating. Those are the side effects you notice first, which is exactly why they get the attention.

They’re also the least important ones.

The effects that actually matter happen where you can’t see them — in your liver, in your cholesterol, and in a hormonal system that can take months to restart. Some of them reverse. Some don’t.

Here’s the honest picture.

Visible — you’ll notice these Internal — bloods only, no symptoms Hormonal Worst after you stop

Why the shape matters. The side effects people worry about — bloating, acne, puffiness — arrive first and clear fastest. The ones that cause lasting harm arrive silently, show up only on a blood test, and in the case of testosterone suppression peak after the cycle ends, when most people have stopped paying attention. That mismatch is why men judge a compound as “well tolerated” while the actual damage is accumulating. This is an illustrative guide, not a clinically validated timeline. The timings are rough estimates based on commonly reported patterns and may vary considerably with dose, duration, other substances used, and individual response. They should not be used to predict exactly when a side effect will appear or resolve.

Why Dianabol Is Hard on the Liver

Start here, because it explains the whole compound.

Dianabol is a C17-alpha alkylated steroid. It’s chemically modified at the 17th carbon position so that it survives first-pass metabolism in the liver.

That modification is what makes it work as an oral tablet. It’s also precisely why it’s toxic to the liver.

Without that alteration the liver would break the compound down before it reached your bloodstream. With it, the compound survives — and the liver takes the strain instead.

What that looks like in practice

Raised liver enzymes. The most common and earliest sign, picked up on a routine blood test as elevated ALT and AST.

Cholestasis. Bile flow slows or stops, which can cause jaundice — yellowing of the skin and eyes — and severe itching.

Peliosis hepatis. Blood-filled cysts form in the liver tissue. Rare, but associated with anabolic steroid use and potentially fatal if one ruptures.

Liver tumours. Prolonged use of C17-alpha alkylated steroids is associated with hepatic adenomas and, in documented cases, hepatocellular carcinoma.

Liver strain is dose-dependent and duration-dependent. It is also largely silent until it isn’t — most men feel nothing while their enzymes climb.

The supplements people take alongside it

Milk thistle and TUDCA are widely used by bodybuilders on oral cycles.

Be clear about what they do and don’t do. There is some evidence for hepatoprotective effects, but no supplement makes a C17-alpha alkylated steroid safe for the liver, and none of them is a substitute for monitoring your bloods.

Cardiovascular Strain

This is the side effect that gets the least attention and probably deserves the most.

You won’t see it in the mirror. You’ll see it on a lipid panel, if anyone runs one.

Cholesterol

Oral anabolic steroids reliably suppress HDL — the protective cholesterol — while pushing LDL upward.

That shift can be substantial and it happens quickly. It’s a genuine cardiovascular risk factor, not a cosmetic number on a report.

Blood pressure

Water and sodium retention drive blood pressure up, and it tends to stay elevated for the duration.

If your blood pressure was borderline before, this is where it becomes a problem.

Red blood cells

Dianabol increases red blood cell production, which sounds like a training advantage.

Pushed too far it thickens the blood, and thicker blood raises the risk of clots. This is measured as haematocrit on a full blood count.

The heart muscle itself

Prolonged anabolic steroid use is associated with thickening of the left ventricle — the heart’s main pumping chamber.

Unlike bloating or acne, this change does not reliably reverse when you stop.

If you take nothing else from this article: anyone using anabolic steroids should have their lipids, blood pressure and full blood count monitored. Most never do.

Gynaecomastia

Dianabol aromatises readily, meaning it converts to oestrogen at a high rate.

Raised oestrogen in men can stimulate the growth of actual breast tissue behind the nipple — not fat, glandular tissue.

Telling the difference matters

Gynaecomastia is firm, often tender, and sits directly behind the nipple. Chest fat is soft and spread across the whole area.

The distinction matters because they have completely different solutions.

Gynaecomastia that develops on cycle may partially resolve afterwards. Once the glandular tissue is established, however, it frequently doesn’t resolve on its own — and established gynaecomastia may require surgery.

Aromatase inhibitors are commonly used to prevent it, since aromatase is the enzyme doing the conversion. These are prescription medicines with their own risks, including bone density loss, and they aren’t licensed for this purpose.

Related: Dianabol Before and After Results

Testosterone Suppression

One of the most consequential effects, and the one with the longest tail.

When you introduce a powerful exogenous androgen, your body reads the high circulating levels and responds by shutting down its own production. The signal from the brain to the testes stops.

This isn’t a side effect that happens to some users. It’s the expected physiological response, and it happens to everyone.

What it causes

• Testicular atrophy — shrinkage, sometimes noticeable within weeks
• Reduced libido and erectile difficulty
• Impaired sperm production and reduced fertility, which can persist after stopping
• Low mood, irritability and fatigue after the cycle ends

The difficulty is the gap. Exogenous hormone leaves your system faster than your natural production restarts, and that window is where men feel worst.

Recovery times vary enormously. Most men restart within months; some take considerably longer, and a minority never fully return to baseline.

Related: Dianabol vs Anadrol — both suppress natural production heavily. And if you’re researching recovery, see Best PCT For Dianabol.

Acne and Oily Skin

Dianabol is a testosterone derivative, and androgenic side effects come with the territory.

Sebum production increases, pores block, and breakouts follow — on the face but frequently worse across the chest, shoulders and back.

If you were acne-prone before, expect it to be significantly worse.

A cleanser containing salicylic acid or benzoyl peroxide helps with mild cases. Severe cystic acne needs a GP, and it can leave permanent scarring.

Worth knowing: acne doesn’t always clear when the cycle ends.

Related: Dianabol vs Testosterone

Body Hair Growth and Scalp Hair Loss

This one is widely misreported, including in earlier versions of this article, so let’s be precise.

Increased body and facial hair is an androgenic effect. Dianabol is an androgen, and androgens drive hair growth on the chest, back, shoulders and face directly. It is not caused by oestrogen conversion.

The scalp does the opposite. In men genetically predisposed to male pattern baldness, androgenic steroids accelerate the process.

So the typical pattern is more hair where you don’t want it and less where you do.

The important asymmetry: increased body hair may lessen after stopping. Scalp hair loss generally doesn’t. If male pattern baldness runs in your family, this is one of the more likely permanent outcomes.

Water Retention and Bloating

Dianabol causes the body to retain sodium, and water follows sodium.

The effect is significant enough that a large share of the weight gained on a cycle is water rather than tissue. It produces the puffy, smooth appearance that makes Dianabol unsuitable for anyone chasing definition.

Reducing salt intake limits it somewhat. Most of the water weight leaves once you stop — which is why the scale drops sharply afterwards and why the “after” photos rarely hold.

Related: Dianabol vs Anavar — a comparison with a compound used for cutting rather than bulking. And on how quickly this appears, see how long Dianabol takes to kick in.

Mood, Aggression and the Crash

The psychological effects get joked about more than they get taken seriously.

On cycle, users commonly report irritability, a shorter temper, restlessness and disrupted sleep. The “roid rage” cliché is exaggerated, but heightened aggression and emotional volatility are genuine and well documented.

After the cycle is often harder. When exogenous hormone clears and natural production hasn’t restarted, the resulting low-testosterone window brings flat mood, low motivation and in some men genuine depression.

This is the phase where relationships take damage, and it’s the one nobody plans for.

If low mood persists after a cycle, that’s a reason to see a GP rather than to start another one.

Side Effects in Women: Virilisation

Dianabol is not considered suitable for women, and virilisation is why.

Virilisation is the development of male characteristics under androgen exposure:

• Deepening of the voice
• Increased facial and body hair
• Clitoral enlargement
• Menstrual irregularity or cessation
• Male-pattern hair loss

Several of these can be permanent. Voice deepening and clitoral enlargement in particular often do not fully reverse when the compound is stopped.

That permanence is the reason the risk profile for women is fundamentally different, not merely greater.

Which Side Effects Are Permanent?

The question everyone actually wants answered.

Usually reversible: water retention and bloating, testicular atrophy, most acne, increased body hair, raised liver enzymes if caught early, blood pressure, cholesterol changes.

Often permanent: male pattern hair loss, established gynaecomastia requiring surgery, deep acne scarring, voice deepening and clitoral enlargement in women.

Sometimes permanent: left ventricular thickening, structural liver damage, and long-term suppression of natural testosterone production.

The pattern is worth noticing. The visible side effects mostly reverse. The structural ones often don’t.

Is Dianabol Legal in the UK?

An important question for UK readers, and one most articles on this topic skip because they’re written for a US audience.

Anabolic steroids including Dianabol are Class C controlled substances under the Misuse of Drugs Act 1971.

Possession and use for personal purposes are not criminal offences. Supplying Dianabol and importing it by post or courier are illegal, although individuals may personally carry steroids into the UK for their own use. Penalties for supply can reach 14 years’ imprisonment and an unlimited fine.

There’s a second problem beyond the legal one. Products bought through unregulated channels have no manufacturing oversight, so dose accuracy, purity and contamination are entirely unverifiable.

You cannot know what’s actually in the tablet. Find out more on whether Dianabol is legal in the UK or not by clicking here.

If You’re Already Using: What to Monitor

This section exists because telling someone to simply stop rarely works, and knowing what to watch for genuinely reduces harm.

Get these tested — before, during, and after:

Test	When	What it catches
Liver function ALT · AST · GGT · bilirubin	Before During After	The earliest warning you’ll get. Liver strain is silent until it isn’t — enzymes climb well before you feel anything.
Full lipid panel HDL · LDL · total cholesterol · triglycerides	Before During After	HDL suppression happens fast and you won’t feel it. This is the cardiovascular risk that gets ignored because nothing hurts.
Blood pressure home monitor, seated, twice weekly	Before During After	Water and sodium retention push it up and keep it up. A £25 cuff is the cheapest useful thing on this list.
Full blood count haematocrit · haemoglobin · red cell count	Before During	Rising haematocrit means thickening blood, and thicker blood raises clot risk.
Hormone panel total testosterone · LH · FSH	Before After	The before reading is the one that matters most — without a baseline you can’t tell whether you’ve recovered or just stopped feeling terrible.
Oestradiol sensitive assay where available	During	Relevant if breast tissue symptoms appear. Once glandular tissue is established, it usually doesn’t go away on its own.

See a doctor promptly — don’t wait for the next blood test — if you notice:

• Yellowing of the skin or eyes
• Persistent pain under the right ribs
• Severe unexplained itching
• Unusual breathlessness
• Chest pain or pressure
• A firm lump behind the nipple

Your GP can order most of these. If you’d rather not have that conversation, UK private services let you order blood work without a referral — though taking the results to a GP is still the sensible move. And be honest about what you’ve taken: it genuinely changes what they look for, and their job is to treat you rather than judge you.

Frequently Asked Questions

How long do Dianabol side effects last?

It depends entirely on which one. Water retention clears within a fortnight or two of stopping, liver enzymes typically normalise over weeks to months, and testosterone recovery usually takes months. Hair loss, established gynaecomastia and virilisation in women may not resolve at all.

Which Dianabol side effects are permanent?

The ones that most often persist: male pattern hair loss, established glandular gynaecomastia, deep acne scarring, and — in women — voice deepening and clitoral enlargement.

Is Dianabol legal in the UK?

It’s a Class C controlled substance. Possession for personal use is not an offence, but supply and importation by post or courier are — including ordering from overseas websites. Personally carrying steroids into the UK for your own use is permitted.

Can you take Dianabol without side effects?

No. Liver strain, cholesterol changes and testosterone suppression aren’t risks that some users avoid — they’re the expected pharmacological response to the compound. Dose and duration affect severity, not whether they occur.

The Bottom Line

Dianabol works. That was never in dispute, and it’s why a compound developed in the 1950s is still in use.

The cost is the part that gets minimised. Liver strain built into the molecule itself, a cholesterol profile that shifts the wrong way within weeks, suppressed natural production that can take months to restart, and a handful of changes that simply don’t reverse.

The visible side effects — bloating, acne, puffiness — are the ones people worry about, and they’re the ones that clear up. The liver, the heart and the hormonal axis are where the lasting damage happens, and none of those announce themselves.

If you’re using, get your bloods done. Liver function, lipids, blood pressure and a full blood count, before and after. That single habit does more to protect you than any supplement on the market.

And if you’re weighing it up rather than already committed, the honest summary is that the risk profile is considerably worse than gym-floor conversation suggests.

ⓘ A note on legal alternatives — sponsored

This section contains affiliate links. We may earn a commission at no cost to you. It doesn’t affect anything written above.

If you want the muscle and strength outcomes without a Class C controlled substance, legal formulations aim to support the same pathways through legal ingredients.

Be realistic about what they do. They are not equivalent to anabolic steroids and any product claiming otherwise is misleading you. What they offer is legality, no oral-steroid liver toxicity, no hormonal suppression and no PCT requirement — in exchange for considerably more modest results.

D-Bal from CrazyBulk is the most established option in this category. Our full D-Bal review covers the formula and what it realistically delivers.

This article is for information only and is not medical advice. It does not encourage the use of anabolic steroids. Anabolic steroids are Class C controlled substances in the UK. If you are using or considering using them, speak to your GP — they are there to treat you, not to report you.

References

Pharmacology, hepatotoxicity and C17-alpha alkylation

1. LiverTox: Clinical and Research Information on Drug-Induced Liver Injury — Anabolic Steroids. NIDDK / NCBI Bookshelf. — https://www.ncbi.nlm.nih.gov/books/NBK548931/
2. Kicman AT. Pharmacology of anabolic steroids. Br J Pharmacol. 2008;154(3):502–521. — https://pubmed.ncbi.nlm.nih.gov/18500378/
3. Anawalt BD. Diagnosis and Management of Anabolic Androgenic Steroid Use. J Clin Endocrinol Metab. 2019;104(7):2490–2500. — https://academic.oup.com/jcem/article/104/7/2490/5310131

Cardiovascular effects

4. Baggish AL, et al. Cardiovascular Toxicity of Illicit Anabolic-Androgenic Steroid Use. Circulation. 2017. — https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.116.026945

Controlled trials of methandienone (Dianabol)

5. Freed DLJ, Banks AJ, Longson D, Burley DM. Anabolic steroids in athletics: crossover double-blind trial on weightlifters. Br Med J. 1975;2(5969):471–473. — https://pubmed.ncbi.nlm.nih.gov/125133/
6. Hervey GR, Knibbs AV, Burkinshaw L, et al. Effects of methandienone on the performance and body composition of men undergoing athletic training. Clin Sci (Lond). 1981;60(4):457–461. — https://pubmed.ncbi.nlm.nih.gov/7018798/

Supplement ingredient safety

7. Björnsson HK, Björnsson ES, Avula B, et al. Ashwagandha-induced liver injury: A case series from Iceland and the US Drug-Induced Liver Injury Network. Liver Int. 2020;40(4):825–829. — https://pubmed.ncbi.nlm.nih.gov/31991029/

UK legal status and health guidance

8. GOV.UK. Misuse of Drugs Act 1971 — controlled drugs list. — https://www.gov.uk/government/publications/controlled-drugs-list–2
9. NHS. Anabolic steroid misuse. — https://www.nhs.uk/conditions/anabolic-steroid-misuse/
10. NHS. Gynaecomastia (enlarged breasts in men). — https://www.nhs.uk/conditions/gynaecomastia/