This vitamin booster of the important vitamins A, D3, C and E helps the bird to recover quickly from a poor condition due to illness, stress or after antibiotic treatment. These vitamins also support the growth of young birds. They also help to increase resistance and contribute to a healthy immune system. - Vitamin A: important for respiratory tracts, mucous membranes, stomach and intestines. - Vitamin D3: important for strong bones and eggshell quality, promotes the absorption of calcium and phosphorus. - Vitamin C: as an extra support for the bird’s condition. - Vitamin E: anti-oxidant. Supports blood circulation, fertility and growth.