TGA: Pharmatech MK-677 capsules contain an undisclosed anabolic steroid

What just happened

On 4 June 2026, the TGA issued a safety alert advising that Pharmatech-branded MK-677 capsules should not be taken. The product is sold as containing ibutamoren — a growth hormone releasing substance, often marketed online as an anti-ageing or muscle-building supplement. Laboratory analysis found that the capsules also contain metandienone, an anabolic androgenic steroid, not declared anywhere on the product label.

Neither ibutamoren nor metandienone is approved for supply in Australia. The TGA has not assessed any product containing these ingredients for quality, safety, or efficacy, as required under Australian legislation. These capsules are not listed on the Australian Register of Therapeutic Goods. The Pharmatech MK-677 product was identified during an ongoing TGA investigation, meaning this alert may be followed by further enforcement actions.

The health risks associated with taking ibutamoren or metandienone — either alone or in combination — include cardiovascular effects, liver toxicity, hormonal disruption, and in women, androgenic side effects including virilisation. The exact dose of metandienone in the capsules is unknown; adulteration in unregulated products frequently involves inconsistent concentrations that cannot be predicted from labelling.

---

The both-and

The wellness supplement market fills a real gap in what people are looking for — better energy, body composition, longevity. The gap between genuine need and what the unregulated market actually delivers is where real harm lands. Both are true.

It matters to acknowledge why people take MK-677. Ibutamoren is promoted online as a growth hormone secretagogue — a substance that stimulates the pituitary to release more growth hormone without injecting it directly. The claims attached to it in the wellness space include improved sleep quality, lean muscle preservation, anti-ageing effects, and increased energy. These are outcomes that genuinely matter to many people — particularly women in midlife managing the hormonal shifts of the perimenopause and menopause transition, where energy, body composition, and sleep are all under pressure simultaneously.

The problem is not that those goals are illegitimate. The problem is that the unregulated online supplement market — which operates across international borders and largely outside TGA jurisdiction on the supply side — cannot guarantee what is actually in the capsule. This alert illustrates the mechanism concretely: a product labelled as 15mg of ibutamoren actually contained an undeclared anabolic steroid. The person purchasing it had no way to know.

Metandienone (historically sold as Dianabol) is a synthetic anabolic androgenic steroid. In women, androgenic steroids can cause virilising effects — changes to voice, body hair, and clitoral size — some of which are irreversible at sufficient dose and duration. Both men and women face cardiovascular risk: adverse lipid effects, left ventricular hypertrophy, and increased thrombotic risk. Hepatotoxicity is well documented with oral 17-alpha alkylated anabolic steroids. The concentration of metandienone in the Pharmatech capsules is not specified in the alert; the dose actually ingested is unknown.

The TGA’s safety alert system monitors the market actively. This is not an isolated case — adulteration of peptide and growth-hormone-adjacent products with steroids is a documented pattern in TGA surveillance of unapproved therapeutic goods. The risk is not limited to one brand. Any product marketed as MK-677, ibutamoren, or a growth hormone secretagogue that is purchased outside an Australian pharmacy, or without a prescription from a registered practitioner, carries structural risk of unknown or undisclosed ingredients.

This does not mean the people purchasing these products are foolish. It means the information asymmetry in the unregulated market is real and consequential.

---

2 cents

If you or someone you know has been taking Pharmatech MK-677 capsules: stop taking them. Speak with your GP about any symptoms you have noticed — changes to voice, unexpected hair growth, mood shifts, palpitations, liver-area discomfort — and consider disclosing any other supplements you may be taking so they can assess your clinical picture fully. If you have specific health concerns related to this product, your GP can report it to the TGA’s adverse event reporting system on your behalf.

More broadly: the goals that MK-677 and similar products are marketed to address — energy, sleep quality, body composition, and hormone support in midlife — are legitimate clinical questions. They are worth raising with your GP or a specialist, who can assess them against your actual clinical situation, identify what evidence-based pathways exist, and help you avoid products carrying hidden risk.

The shortcut pathway — buying an unapproved product online because the conversation with the health system feels too slow, too expensive, or too dismissive — is completely understandable. It is also precisely where the harm lands.

This is general information about a TGA safety alert. If you are experiencing symptoms you associate with a supplement or unregulated product, see your GP.

---

Verdict

Verdict: yes — do not take this product.

The TGA has confirmed that Pharmatech MK-677 capsules contain an undisclosed anabolic steroid. If you are currently taking them, stop and seek GP review. Broader lesson: any MK-677 or ibutamoren product purchased without a prescription from an Australian registered practitioner carries structural risk of unknown ingredients. The goals these products are marketed for are worth pursuing — through a GP conversation and legitimate clinical pathways.

---

Sources cited

1. TGA — Unapproved ibutamoren capsules (MK-677) found to contain undisclosed anabolic steroid (safety alert, 4 June 2026)
2. TGA — Ibutamoren (MK-677) regulatory information
3. TGA — Safety alerts listing
4. TGA — Unapproved therapeutic goods