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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

Abnormal spinal curvatures: kyphosis, lordosis, and scoliosis. Abnormal spinal curvatures: kyphosis, lordosis, and scoliosis.
Human Heart Cir Human Heart Cir
Heart Model Heart Model
Sequence of patient positions for heart auscultation Sequence of patient positions for heart auscultation
The flow of blood valves of the heart. The flow of blood valves of the heart.
A lesion called a plaque in the brain of an individual with Alzheimer disease. A ring of degeneratin A lesion called a plaque in the brain of an individual with Alzheimer disease. A ring of degeneratin
Video: Role of the urinary system - acidosis and alkalosis

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