with different types of foam systems for structural firefighting and some have deployed front-line. apparatus with class A foam systems as an added tool in their firefighting arsenals. TYPES OF FOAM DELIVERY SYSTEMS. Class A foams consist of a mixture of water, foam concentrate, and air.
Skin Reaction from Vitamin D. I took a natural vitamin D3 supplement for several weeks and had a skin reaction on my back that slowly went away after I stopped taking it. There were no other variables that could have interfered at that time.
Certain drugs like antibiotics, antifungal and narcotics are implicated in itching of skin, but not vitamins. Change in personal care products can also cause itching of the skin. Confirmation can be achieved only after physical examination, history and blood work by a dermatologist. Hope this helps.