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Can Vitamin B supplements really stop fleas from biting my dog?

Updated On September 23rd, 2025

Pet's info: Dog | Dachshund miniature | Female | spayed | 1 year and 3 months old | 8 lbs

Is it true that if your dog takes vitamin B the fleas won’t go on them because they don’t like the smell?

1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on September 3rd, 2018

It does minimize attraction to moskitoes, however I do not think this works for fleas. It will however make your dog smell like Vitamin B which is a very intense aroma which you may not like. I suggest you use prper frea prevention such as this: Flea products: Spot-ons and/or chews Advantage, Advantix Advantage Multi (Advocate in the UK) Frontline (ticks as well) Bravecto spot on (ticks as well) - for cats, in tablet form for dogs Simparica, Nexgard Revolution (stronghold in the UK) Tablets: comfortis (will only kill fleas once) Collar: Seresto (ticks as well)

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