I have these white spots on my fingernails....?

I have a pretty good diet and exercise a few times a week. I'll admit it could all be better but anyway What are those annoying spots? And how can i make them go away and prevent them from coming back? Thanks.
Common Nail Disorders
Nail disorders comprise about 10 percent of all Skin conditions. Due to their location, nails take a lot of abuse. Most of us have closed fingers in doors, suffered from ingrown toenails, or endured minor nail or nail fold infections. Sometimes, toenail injuries result from poor fitting shoes or athletic activity. Although they might be unsightly for a while due to the nail's slow growth rate, most minor nail injuries heal on their own. More serious injuries or disorders require professional treatment. Symptoms that could signal nail problems include color or shape changes, Swelling of the skin around the nails, pain, the persistence of white or black lines, dents or ridges in the nail, and should be reported to a dermatologist.

White Spots are small, semi-circular spots that result from injury to the base (matrix) of the nail where nail cells are produced. They are not a cause for concern and will eventually grow out. White spots are very common and usually recur.

Protein deficiency may make the nail beds appear white. Protein (free form amino acids) helps aid in building materials for new nails. Free form amino acids are rapidly absorbed and assimilated by the body. Brewer�s yeast-contains all the needed nutrients high in protein.

If you notice white spots, also known as leukonychia, on your nails, they unlikely to have been caused by a vitamin or mineral deficiency. In a few cases, white spots on fingernails can indicate an underlying infection, but much more commonly, they are the result of injury. Similar to bruising, white spots on fingernails do not show up immediately. It may take several days or weeks before you notice the spots. Because they are generally the result of a minor injury, you are likely to have forgotten all about banging your fingernail against the car door.

White spots on fingernails are usually not the result of serious injury to the nail, such as being hit with a hammer, which would more likely result in dark blue to black spots and possible necrosis or death of the nail tissue. Fingernails grow at an average rate of half an inch per month, so most visible injuries to the nail take about eight weeks to grow out completely. Sometimes, white spots on fingernails fade before they completely grow out.
http://www.aad.org/public/publications/p...
http://www.bellaonline.com/articles/art3...
http://www.wisegeek.com/what-causes-whit...