Urgent Warning: Undeclared Drug Found in Natures Valley Collagen Tablets

TGA Alert Raises Concerns Over Potential Health Risks

Apr. 12, 2026 at 5:08am

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A ghostly, translucent X-ray photograph of a collagen supplement capsule, revealing its internal structure and the presence of an undeclared drug as glowing, ghostly lines against a dark background.An X-ray image of a collagen supplement capsule exposes the hidden presence of an undeclared drug, underscoring the potential health risks associated with tainted over-the-counter products.Denver Today

A recent alert from Australia's Therapeutic Goods Administration (TGA) has raised concerns about the safety of Natures Valley Collagen Builder tablets. The TGA discovered that the supplements contain an undeclared drug, sildenafil, which can cause serious side effects when taken without medical supervision, especially for those with pre-existing health conditions.

Why it matters

The discovery of sildenafil in these over-the-counter supplements is alarming, as it can interact dangerously with common prescription medications like nitrates. Patients with diabetes, high blood pressure, high cholesterol, or heart disease may be at a higher risk of experiencing adverse effects if they unknowingly consume these tainted products.

The details

The TGA's investigation revealed that the Natures Valley Collagen Builder tablets contain a significant amount of sildenafil, a prescription-only medication in Australia. Sildenafil is typically used to treat erectile dysfunction, but it can also cause serious side effects when taken without medical supervision, such as dangerously low blood pressure.

  • The TGA issued the alert on April 12, 2026.

The players

Therapeutic Goods Administration (TGA)

Australia's regulatory body responsible for evaluating the safety and quality of therapeutic goods, including medicines and medical devices.

Natures Valley

The company that manufactures the Collagen Builder tablets found to contain the undeclared drug sildenafil.

Robyn Langham

The chief medical officer of the TGA, who issued a strong warning to Australian consumers about the potential dangers of the tainted Natures Valley supplements.

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What they’re saying

“We must not let individuals continue to damage private property in San Francisco.”

— Robert Jenkins, San Francisco resident

“Fifty years is such an accomplishment in San Francisco, especially with the way the city has changed over the years.”

— Gordon Edgar, grocery employee

What’s next

Consumers are advised to stop using Natures Valley Collagen Builder tablets immediately and return the remaining tablets to a pharmacy for safe disposal. Individuals who have recently purchased these supplements are encouraged to consult their healthcare providers to discuss any concerns and explore alternative options for managing their health and wellness goals.

The takeaway

This incident serves as a stark reminder of the importance of transparency and regulation in the health supplement industry. As consumers, it is crucial to be vigilant and make informed decisions when it comes to our health, as the potential risks associated with tainted or mislabeled products can be severe, especially for those with pre-existing medical conditions.