Fitness basics
Learning Center
Kratom: Unsafe and ineffective
Users claim kratom lifts mood and boosts energy, but there are many safety issues and questions about whether it works. Learn more before trying it.
Kratom for opioid withdrawal: Does it work?
Kratom is promoted as an aid in overcoming withdrawal from opioid medications, but research suggests that it leads to more health problems than it solves.
How fit are you? See how you measure up
Find your fitness level with these simple fitness tests.
High-dose vitamin C: Can it kill cancer cells?
High-dose vitamin C has been touted by some as an effective alternative cancer treatment.
High cholesterol treatment: Does cinnamon lower cholesterol?
Can cinnamon lower cholesterol?
Herbal supplements and heart medicines may not mix
Some herbal supplements can have dangerous interactions with heart medications.
Heart rate: What's normal?
A normal resting heart rate for adults ranges from 60 to 100 beats per minute. A heart rate above or below that may signal a problem.
Glucosamine: Does it protect cartilage in osteoarthritis?
Glucosamine manufacturers claim their products slow or stop cartilage damage in osteoarthritis.
Gallbladder cleanse: A 'natural' remedy for gallstones?
A gallbladder cleanse is a popular alternative remedy for gallstones. But does it work?
Flaxseed: Is ground better than whole?
Nutrition experts recommend ground flaxseed over whole flaxseed. Find out why.
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