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.
Skin eruptions can result from a deficiency of vitamin B-1. According to the Acu-Cell Nutrition website, lack of vitamin B-3 and B-4 can cause pellagra and dermatitis, whereas an overdose can cause a skin rash. Improper levels of biotin in the body can contribute to skin disorders and seborrheic dermatitis in infants.