[Vitamin allowance of workers engaged in the manufacture of phosphorus].

The clinical trials of a new treatment and prophylactic diet at the Chimkent phosphorus plant have shown its high efficacy as compared to an old one. This was manifested in the improvement of the workers supply with retinol, tocopherol, ascorbic and nicotinic acids. The treatment and prophylactic diet produced a more efficacious action on the vitamin supply when being a constituent part of the corrected daily nutrition that of the factual nutrition.