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.
Avoid in people with known allergy or sensitivity to products that contain vitamin E. Skin reactions, including inflammation or itching, have been reported with vitamin E applied to the skin.
1 When vitamin B12 is taken at normal doses, side-effects are rare. 2  High doses may cause acne. 3  Allergies to vitamin B12 supplements have been reported and can cause swelling, itchy skin and shock.4  Interactions. 5  Drugs for acid reflux, diabetes and other conditions may make it harder for your body to absorb vitamin B12. When vitamin B12 is taken at normal doses, side-effects are rare. 2  High doses may cause acne. 3  Allergies to vitamin B12 supplements have been reported and can cause swelling, itchy skin and shock.