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.
This doesn't mean that taking vitamins or applying topical vitamin E will allow you to safely bake in the sun, but you can help your skin stay healthier and more supple by ensuring you get enough of this antioxidant vitamin [source: Bouchez].