If you’ve ever turned your cat’s food packet around and spotted the words ‘brewers dried yeast’ on the ingredient list, you might have paused and wondered, “Isn’t that used for making beer? What’s it doing in my cat’s food?”
You’re not alone. Brewer’s yeast sounds like an odd addition to a cat’s bowl, but it’s actually a pretty common ingredient in both dry and wet cat food today. Some cat parents swear it’s the secret to shinier coats and better digestion, while others are skeptical or worry about allergies.
So, what exactly is it, and is it good for your cat? Let’s take a closer look inside the bowl.
What Is Brewer’s Yeast ?
Brewer’s yeast, or Saccharomyces cerevisiae, is a type of yeast originally used in beer making. But the version used in pet food is deactivated, which means it’s safe for cats and no longer has any fermenting properties.
It’s naturally rich in several nutrients that cats can benefit from, including B vitamins, amino acids, minerals like selenium and zinc, and compounds that may support a healthy gut. In ingredient lists, you’ll often see it written as ‘brewers dried yeast’.
Here’s a quick overview of what brewer’s yeast brings to your cat’s food:
| Component | Effect |
| B vitamins | Support metabolism, skin, coat, and nerve health |
| Protein | Adds amino acids that complement animal protein |
| Beta-glucans | Help support digestion and immune response |
| Chromium | Aids healthy glucose metabolism in small amounts |
| Natural flavor compounds | Make food tastier and more appealing to cats |
Why Is Brewer’s Yeast Used in Cat Food ?
Cats are obligate carnivores, which means they rely on meat for most of their nutrition. So why would a plant-based ingredient like yeast appear in their food?
The answer lies in balance. Brewer’s yeast offers a few special benefits that make it useful in cat food formulas. It adds B vitamins and trace minerals that can support your cat’s energy, skin, and coat. It also makes food smell and taste more appealing, which can be a lifesaver for picky eaters.
Some pet food makers also include it because its natural compounds may support a healthy gut, while others appreciate that it adds texture and consistency to the mix.When used in moderation, brewer’s yeast isn’t a filler. It’s a small, functional ingredient that adds nutritional and sensory value.
The Good and the Bad of Brewer’s Yeast
| Pros | Cons |
|---|---|
| A natural source of B vitamins that support a healthy coat and skin | Some cats may be allergic or sensitive to yeast, which can cause mild digestive issues such as bloating or soft stools. |
| Enhances flavor and smell, encouraging cats to eat | Low-quality yeast or excessive amounts may upset the nutritional balance of the food and should be avoided, especially for cats with underlying health conditions like yeast allergies or inflammatory bowel disease. |
| Contains nutrients that may aid digestion and immunity and reduces waste by using a by-product of brewing. | Cats that frequently get yeast-based ear infections or skin problems may not do well with added dietary yeast. |
So How Do You Pick the Right Food ?
Don’t avoid cat food just because it contains brewer’s yeast. What matters is quality and quantity. Choose brands that clearly list ‘brewers dried yeast’ and still use animal protein as the main ingredient.
If your cat has allergies or a sensitive stomach, introduce yeast-containing food gradually. Brewer’s yeast can also be given as a supplement, but only in small, precise amounts. Too much may cause diarrhea or constipation, so always consult your vet for the right dosage and form.Lastly, please ensure it’s specifically made for cats and never use brewer’s yeast meant for humans or from supermarkets.
Our Takeaway
Brewer’s yeast might sound strange at first, but it can actually be a helpful addition to your cat’s diet when used thoughtfully. It adds valuable nutrients, makes food more flavorful, and may even support digestion and coat health.
The key is transparency and balance. Look for clear labeling, quality ingredients, and foods that put your cat’s needs first. So the next time you see ‘brewers dried yeast’ on your cat’s food label, you’ll know it’s not just a random ingredient. It’s a little boost of nutrition and taste that helps make your cat’s meal both healthy and enjoyable right inside the bowl.
Next in our Inside the Bowl series, we’re taking a closer look at Flaxseed powder and see whether it really belongs in your cat’s bowl.