Brewer's Yeast for fleas.

Dr. Marie replied:

It's a bit of an old wive's tale that Brewers yeast or garlic works to kill fleas.

Garlic can actually be toxic to dogs. It's possible that feeding a dog garlic may make it a little less tasty to fleas but it's not going to kill fleas.

I just did some searching for you as I never want to discount something just because I think that it's not true. I actually found a scientific study that was done to determine if brewer's yeast works for fleas. You can read the abstract here:

Does Brewer's Yeast Kill Fleas?

As you can read in the article the dogs treated with Brewer's yeast had no reduction in flea numbers at all.

I wish there were an easy and inexpensive remedy to fleas. If there was something that worked perfectly then we'd all be recommending it! One of the problems that I am seeing now is that fleas are getting resistant to many treatments. I blame this on over the counter pet store flea products. These products will usually only kill a percentage of the fleas. The fleas that remain then go on to reproduce and create a population of fleas that can resist cheap flea products.

The only products that I believe in are prescription strength products. These include:

• Advantage <--You can buy this online without a prescription.


• Revolution


• Frontline <--You can buy this online without a prescription.


• Comfortis



---This question was asked in our Ask A Vet For Free section.---



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Disclaimer: Although Dr. Marie is a qualified veterinarian, the information found on this site is not meant to replace the advice of your own veterinarian. AskAVetQuestion.com and Dr. Marie do not accept any responsibility for any loss, damage, injury, death, or disease which may arise from reliance on information contained on this site. Do not use information found on this site for diagnosing or treating your pet. Anything you read here is for information only.