There is a unique relationship between Protein and Vitamin A. Animal studies from Furusho et al (1) have shown that Vitamin A reserves held within the liver are diminished when a high protein diet is eaten. Vitamin A is seen to increase in the rest of the body during this time. One theory as to why this is the case is that protein is the key to Vitamin A transport and utilization within the body. 

In short, Vitamin A is depleted in the liver by a high protein diet, but it is also needed for new protein synthesis in the case of athletes or bodybuilders, for example. If protein is eaten without fat — as is the case with eating strictly lean diets — you may find that precious fat-soluble vitamins (such as Vitamin A) will be depleted from your system more rapidly. “The combination of a high-protein diet that depletes Vitamin A and a low-fat diet that fails to provide Vitamin A is a clear recipe for deficiency of this vital nutrient".

If you are looking for a source of protein to add to your diet, look no further than our Perfect Plant Protein! Now, if you are wondering where there are sources of Vitamin A to complement your protein intake, we’ve got you covered for both vegetarian and animal based diets,our Perfect Aquatic Greens- which is  a 50/50 blend of Chlorella and Spirulina, is our richest source of Vitamin A, with a whopping 5,282 iu of Vitamin A per serving. Perfect Desiccated Liver is another amazing option for those looking for rich sources of Vitamin A.

references:

(1) Furusho, et. al.,“Tissue specific-distribution and metabolism of vitamin A are affected by dietary protein levels in rats,” Int J Vitam Nutr Res. 1998; 68(5):287-92.

(2) Narbonne, et. al.,“Protein metabolism in vitamin A deficient rats. II. Protein synthesis in striated muscle,” Ann Nutr Aliment. 1978; 32(1):59-75.

(3) Masterjohn, C. (2004). Vitamin A, The Forgotten Bodybuilding Nutrient, Wise Traditions.