Why are zeaxanthins important for dogs?
Like humans, dogs have a macula, a spot on the retina that is responsible for sharp vision. The macula contains high concentrations of zeaxanthin and another carotenoid called lutein. These two substances form a filter that absorbs blue light and thus protects the eyes from damage.
Zeaxanthin and lutein cannot be produced by the body itself, but must be obtained from food. An adequate supply of these carotenoids can reduce the risk of age-related eye diseases such as cataracts or macular degeneration. Zeaxanthin and lutein can also improve visual acuity and contrast vision.
How much zeaxanthin does a dog need?
There are no official recommendations for the optimal amount of zeaxanthin for dogs. However, you can use the guideline values for humans as a guide, which are around 2 to 4 milligrams per day. As dogs are smaller than humans, they probably need less zeaxanthin per kilogram of body weight.
To provide your dog with enough zeaxanthin, you can occasionally feed him vegetables or fruit that are rich in this carotenoid. For example, you can mix cooked corn, peppers or spinach into his food or give him a slice of orange or kiwi as a treat. However, make sure that you only give small amounts and that you don't feed plants that are poisonous to dogs, such as onions or grapes.
Are there any disadvantages of zeaxanthin for dogs?
Zeaxanthin is generally well tolerated by dogs and has no known side effects. However, you should be careful not to give your dog too much zeaxanthin, as an overdose can lead to yellowing of the skin. Although this is not dangerous, it is unaesthetic.
You should also make sure that you don't feed your dog too many vegetables or fruit, as this can lead to digestive problems. Too much fiber can cause bloating, diarrhea or constipation. In addition, some plants can change the pH value of the urine and thus increase the risk of urinary tract infections or bladder stones.