Nutrition basics
Learning Center
Infant growth: What's normal?
Infant growth rates depend on various factors. Consider what's typical during baby's first year.
Insomnia: How do I stay asleep?
Waking up in the middle of the night and not being able to get back to sleep is a common form of insomnia. Here's how to fall asleep again.
Intermittent fasting: What are the benefits?
Intermittent fasting isn't new, but it's gaining followers. What's the appeal?
Is a home sperm test useful?
Using a home sperm test to check your fertility may not provide a clear answer.
Isometric exercises: Good for strength training?
Learn more about isometric exercises that contract a particular muscle or group of muscles.
Juicing: What are the health benefits?
Learn about the pros and cons of extracting the juice from fresh fruits and vegetables.
Loss of sex drive in men: Natural with aging?
Age-related loss of sex drive is normal, but sometimes an underlying condition is at play.
Male masturbation: Does frequency affect male fertility?
Male masturbation has little effect on sperm count or quality.
Melatonin side effects: What are the risks?
Melatonin is generally safe for short-term use but can cause side effects.
Monosodium glutamate (MSG): Is it harmful?
Monosodium glutamate (MSG) can trigger headaches and other symptoms in some people.
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