Flexitol 10% and 25% Urea Cream. Flexitol 10% Urea Cream – apply to all pre-callused diabetic feet. Flexitol 25% Urea Heel Balm – apply to all callused diabetic feet. Being inherently hygroscopic, urea hydrates the skin by increasing the water uptake from the dermis layer of the skin and enhances the water-binding capacity of the stratum corneum.
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