1. What are the best things to eat/drink to help increase concentration and focus in school?
http://answers.yahoo.com/question/index;_ylt=AtAID76gcKsw.XcBu.7r173sxQt.;_ylv=3?qid=20090401081502AAccgQb
-blueberries
-salmon
-green tea
-almonds
-dark chocolate

2. what is the big deal about vitaman C
Vitamin C vitamin helps to heal wounds, keeps the immune system strong, keeps your teeth and gums healthy, it also helps the body absorb iron and folic acid. Studies have shown that it plays an important role in the antioxidant defence system, destroying free radicals thereby reducing the risks of degenerative diseases like cancer and slowing down cell damage and the ageing process.
http://answers.yahoo.com/question/index;_ylt=AszlYe8ioUKbuV.J4VlvabgjzKIX;_ylv=3?qid=20070626123134AANBYAG

3.wats the most common vitiman defiency
Vitiman D
http://odyb.net/nutrients/vitamin-d-is-the-most-common-vitamin-deficiency-in-the-world/

4.whats kinds of fats are there. are any of them good?
there are 6 types of fat some of them are good.
http://odyb.net/nutrients/are-you-aware-of-these-6-types-of-fat/

5.what are the effects of obiesty
http://odyb.net/physical-health/9-types-of-diseases-caused-by-obesity/