Stop Contaminating Environment with Toxic Growth Hormone

Target: Secretary of Agriculture Tom Vilsack

Goal: End use of growth hormone that threatens fish populations in factory farms.

The environment is at much greater risk than previously thought from the extremely common trenbolone acetate (TBA) growth hormone, according to a new study. TBA is known to hurt fish and other aquatic animals. Demand that the use of this hormone be outlawed at once.

Trenbolone acetate is an artificial growth hormone very frequently used on cattle in factory farms to stimulate muscle growth and ensure that each animal has as much meat on them as possible. The compound, which acts by disrupting animals’ endocrine systems, has become a regular fixture in many rivers, streams, and lakes via runoff from farms.

For decades it was assumed that this TBA runoff into bodies of water was not an issue because its chemical compound broke down in direct sunlight, effectively rendering it inoperable and not a threat to aquatic life. According to a study just published in Nature Communications, however, this assumption was misguided—TBA reconstitutes itself in darkness, and as a result, remains in the environment for much longer, and in much higher concentrations, than traditionally thought.

Populations of fish exposed to this compound reproduce less frequently, have unequal numbers of males and females, and display disruptions to their own hormonal processes and development. Sign the petition below to demand that the use of TBA in farms be outlawed at once to stop its detrimental effects on aquatic wildlife.


Dear Secretary Vilsack,

I am writing you today about a study recently published in Nature Communications that investigated the impact of the common cattle trenbolone acetate (TBA) growth hormone and its environmental impact. Worryingly, the study revealed that its effect was much greater than previously thought.

According to the study, TBA, which is frequently transferred into natural bodies of water like rivers and streams via runoff from cow manure at farms, remains in the natural environment much longer than has been assumed. This is alarming, because it has been a long-established scientific fact that TBA has negative impacts on the fish and other aquatic wildlife found in these rivers and streams.

Cattle farming, if it is to be done, must be done responsibly. Poisoning our environment and making it inhospitable to the animals living in it is not acceptable. I demand that you take action to ban the use of TBA in cattle farming nationwide so that it stops polluting our rivers and lakes and hurting the animals that live in them.


[Your Name Here]

Photo credit: Tar-ba-gan

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One Comment

  1. Ruth Rogers Ruth Rogers says:

    Please sign this petition.

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