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.
Vitamin B12 (Cyanocobalamin) deficiency causes white spots on the skin. Vitamin B12 is a water soluble vitamin of the B complex and one of its form is known as Cyanocobalamin. Vit B12 is vital for the normal functioning of the nervous system and in the production of other B complex vitamins.itamin B12 deficiency causes white spots on the skin. These vit B12 deficiency white spots on skin, lack melanin and occur anywhere on the body. These vit B12 deficiency caused white spots may be itchy, often occurring on the outside of the forearm.