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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.
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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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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.