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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.
Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.