I saw a post on DSM (Bovaer’s manufacturer), and it made me do a deep dive on what exactly we’re feeding our livestock now.
What is Bovaer?
Bovaer is a feed additive made by DSM-Firmenich, designed to reduce methane emissions from cattle. The active ingredient is 3-nitrooxypropanol (3-NOP), which inhibits a specific enzyme in the cow’s stomach that produces methane. The result? Up to a 30% reduction in methane emissions.
Sounds great on paper, right? But let’s take a closer look.
DSM says that Bovaer is safe for animals, safe for consumers, and safe for the environment. It’s been approved in multiple countries including the EU, Brazil, Chile, and Australia.
Sustainable farming?
The push for Bovaer is happening under the banner of sustainable farming. Methane from cattle is a significant contributor to greenhouse gas emissions, and there’s enormous pressure on the agricultural industry to reduce its footprint.
But here’s where I start asking questions.
I did have a look at DSM’s website and their FAQ on Bovaer. They state it has been through over 10 years of research, 48+ peer-reviewed studies, and 4,300+ animals tested.
Let’s unpack a few of the concerns that have been raised:
1. 3-NOP breaks down into compounds including 1,3-propanediol and nitrate. While DSM says these are naturally occurring and safe at the levels present, the long-term effects of chronic low-dose nitrate exposure in cattle (and subsequently in consumers) are not fully understood.
2. A European Food Safety Authority (EFSA) report noted that 3-NOP is an irritant to the skin, eyes, and respiratory tract. While this primarily affects handlers rather than consumers, it raises questions about the safety profile of the compound.
3. A peer-reviewed study (Choi et al., 2025, Journal of Animal Science and Biotechnology, funded by DSM-Firmenich) found that methane emissions returned to pre-treatment levels within about 16 days of stopping 3-NOP, with the authors concluding that continuous supplementation is needed for any lasting reduction. The fact that this came out of DSM’s own funded research makes the dependency even harder to wave away. This creates ongoing reliance on the product.
Canada’s original assessment of 3-NOP noted it is “explosive when dry” and recommended classification as a Category 2 substance due to mutagenicity concerns. While DSM argues the concentrations in the feed additive are too low to pose risk, the raw compound’s profile is worth noting.
If farmers’ cattle are consuming something their gut bacteria weren’t designed for, and we then consume the beef, dairy, and byproducts from those animals — what’s the downstream impact?
What about regenerative agriculture?
Here’s what frustrates me. We have a proven, natural solution to the methane problem — it’s called regenerative agriculture. Rotational grazing, soil health management, biodiversity restoration. These approaches don’t just reduce emissions — they actively sequester carbon.
Instead of feeding chemicals to our animals, we could be working with nature. But that doesn’t generate recurring revenue for a chemical company.
Advocates of regenerative ag point out that healthy soil can absorb more carbon than cattle emit. The problem isn’t the cow — it’s how we farm the cow. Allan Savory’s work on holistic management has demonstrated this for decades.
What do I want?
I want transparency. I want consumers to know what’s being fed to the animals they eat. I want proper long-term safety data — not 10 years, but generational studies. I want regulatory bodies to apply the same scrutiny to feed additives that they apply to human pharmaceuticals.
And I want us to stop pretending that the answer to every problem is a new chemical.
Michael Nuggin — Nuggins.life