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Vitamin D Deficiency

Vitamin D deficiency has been linked with rickets, cancer, cardiovascular disease, severe asthma in children and cognitive impairment in older adults. Causes include not ingesting enough of the vitamin over time, having limited exposure to sunlight, having dark skin, and obesity. Symptoms include bone pain and muscle weakness. Treatment for vitamin D deficiency involves obtaining more vitamin D through supplements, diet, or exposure to sunlight.

Seasonal Depression

Second Source article from WebMD

Vitamin D Deficiency

Depression

Depression is an illness that involves the body, mood, and thoughts and affects the way a person eats and sleeps, the way one feels about oneself, and the way one thinks about things. The principal types of depression are major depression, dysthymia, and bipolar disease (also called manic-depressive disease).

Seasonal Affective Disorder (SAD)

Seasonal affective disorder is a type of depression that tends to occur as the days grow shorter in the fall and winter. Symptoms of seasonal affective disorder include tiredness, fatigue, depression, irritability, body aches, poor sleep, and overeating.

What Does Red Light Therapy Do?

Red light therapy or RLT is a type of therapy that exposes you to low levels of red or near-infrared light for treating certain conditions, such as skin and muscle issues. Red light therapy is good for skin health, wound healing, pain relief and other things.