A variety of abbreviations exist to designate the applicable certifications, specialties and education of nurse practitioners. General Abbreviation The general abbreviation for nurse practitioners is NP. A general nurse practitioner has completed at least a bachelor degree and has a license to work as a registered nurse (RN) in her home state. Additionally, she has at least two years experience practicing as an RN and has completed a masterâs degree and additional training.
Our body creates most of our vitamin D from direct sunlight on our skin. We also get vitamin D from some foods â including eggs, meat and oily fish such as salmon, mackerel and sardines.
1 Your body normally makes melanin to try to protect the deeper layers of your skin from damage. 2  When your skin gets damaged by the sun's rays, it makes even more melanin to try to protect your skin from being damaged even more.  Dark-skinned people usually turn darker brown, or tan, when they go in the sun.