Tanning and Red Light Therapy Glossary
Browse the glossary using this index
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Psoriasis is a common skin condition that causes skin redness and irritation. Most people with psoriasis have thick, red skin with flaky, silver-white patches called scales.
Red Light Therapy
Seasonal affective disorder
Seasonal affective disorder (SAD) is episodes of depression that occur at a certain time of the year, usually during winter. The disorder may begin during the teen years or in early adulthood. Like other forms of depression, it occurs more often in women than in men.
The sun protection factor of a sunscreen is a laboratory measure of the effectiveness of sunscreen — the higher the SPF, the more protection a sunscreen offers against UV-B
Wavelength is a measure of the distance between repetitions of a shape feature such as peaks or valleys; such as the crest of two adjacent waves.