Supplements and Pets: Echinacea, Garlic and Ginkgo Biloba

Echinacea is among the best known supplements and has been touted in people for helping in the recovery from a variety of illnesses, especially the cold and the flu. Echinacea is usually prescribed as an immune-boosting supplement for pets. I use it for a number of disorders, especially bacterial, fungal, and viral infections, and chronic diseases of any organ. It’s also one of my favorite supplements for pets with demodectic mange.


Echinacea is generally considered safe when used under supervision. In the older literature, there is a warning not to use this herb for certain immune disorders (autoimmune diseases, diabetes) and disorders with diminished immune systems with low white blood cell counts (feline leukemia and immunodeficiency diseases.) However, echinacea has been used in these instances without obvious harm. Generally, echinacea is not meant for long term use and most doctors limit its use to a few months at a time.


Garlic is a favorite herb used by many pet owners to control fleas, ticks, mosquitoes, and other insects. While many of my clients swear by the ability of garlic to control fleas, and while I have no problem recommending its use, controlled studies have shown garlic to be ineffective as an insecticide. Garlic also has show antimicrobial and anti-cancer properties. Garlic can cause anemia in dogs and cats due to the presence of S-methyl cysteine sulfoxide and N-propyldisulfhide. Therefore, it should not be used in pets with anemia. As a general guideline, 1 clove of garlic per 10 pounds of body weight for dogs (and 1/2 clove per cat) can usually be fed safely each day. If you use garlic regularly (as a general food supplement,) it would be wise to have your pet’s blood checked every few months to make sure anemia is not occurring.


Ginkgo is a well-known and popular herb that has a number of uses. It is best known as a supplement that may improve cognitive disorder in aging people and pets, particularly in those with mild dementia (Alzheimer’s in particular.) While its ability to prevent blood clots can be beneficial in certain cases, a well-known side effect of ginkgo is increased and potentially serious bleeding problems. In people, bleeding (including fatal brain hemorrhages) have been reported when ginkgo was combined with high doses of fish oil or other anticoagulants.

Avatar Written by Shawn Messonnier DVM

Get the Healthiest Newsletter!

Get a dose of Healthy delivered straight to your inbox. Each FREE issue features amazing content that will elevate your Body, Mind, and Spirit.

Your data is never shared with 3rd parties

Body+Mind+Spirit

TRANSFORM YOUR LIFE?

Try the Internet's Longest-Running Wellness Program.