Vitamin E is the body's primary fat-soluble antioxidant, protecting cell membranes from oxidative damage caused by free radicals. For your rabbit, it supports a healthy coat, strong immune responses, proper muscle function, and reproductive health. Vitamin E works synergistically with vitamin C (which rabbits can synthesize on their own) to create a regenerative antioxidant cycle. Fresh leafy greens and hay are natural sources, though vitamin E content in hay decreases as it ages and is exposed to light.
A few leaves of fresh kale (about 30g) provide roughly 0.4mg of vitamin E — your adult rabbit needs approximately 4 to 5mg of vitamin E per day (about 40 to 50mg per kilogram of diet). Fresh, well-stored hay and a daily variety of leafy greens will meet this need, but hay that has been stored for many months in sunlight or heat loses vitamin E significantly.
0.01% of daily nutrient intake
Vitamin E makes up 0.01% of your domestic rabbit's total daily nutritional requirements by weight. That's a tiny amount — but it matters.
Muscle weakness or stiffness (nutritional muscular dystrophy), poor coat condition, reproductive failure in breeding rabbits, and weakened immune defenses. Deficiency can occur in rabbits fed old or poorly stored hay where vitamin E has degraded.
Vitamin E has a wide safety margin and toxicity from food sources is extremely rare. Very high supplemental doses could theoretically interfere with blood clotting by affecting vitamin K metabolism, but this is not a practical concern from dietary sources.
| Life Stage | Size | Min | Max | Unit | Notes |
|---|---|---|---|---|---|
| Adult | — | 4 | 5 | mg | About 40-50mg per kilogram of diet. Fresh hay and leafy greens provide adequate amounts. |
Source: NRC 1977, general veterinary consensus
Selenium and vitamin E form a powerful antioxidant partnership. Selenium is a key component of glutathione peroxidase, while vitamin E protects cell membranes directly. Together, they provide layered protection against oxidative stress and free radical damage, each compensating for gaps in the other's coverage.
What this means: A diet rich in fresh hay (selenium source) and varied leafy greens (vitamin E source) naturally provides both nutrients together. No special supplementation is needed — the synergy works best when both nutrients come from whole food sources.
Vitamin C regenerates vitamin E after it has neutralized a free radical, effectively recycling this fat-soluble antioxidant. This regenerative cycle means both vitamins work more effectively together than either does alone.
What this means: Feeding a variety of fresh greens naturally provides both vitamins together. The vitamin C your rabbit synthesizes internally also contributes to this beneficial cycle.
