The researchers of the center Waltham studied the effects of various levels of supplementation in vitamin A to puppies of the birth at the age of 52 weeks.
They checked their clinical parameters, hématologiques, biochemical and radiographic and noted no significant difference between the tested groups, whatever is the level of supplementation.
It seems that a level of supplementation, even raised, in vitamin A thus has no negative incidence on the growth of puppies.
However, Penelope Morris, of the research center Waltham, qualified his conclusion by specifying that the vitamin A in excess was stored in the liver, a storage which, later, could have one impacts on negative on the absorption of the other minerals and the osseous mineralization of the puppy. She thus considers necessary a follow-up in the longer term dogs, estimated at ten years. This follow-up is always in progress, tested animals being boarders of the center Waltham.
source: La dépêche Vétérinaire n°1092
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