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Over the past decade, in study after study in animals and people, exercise has been shown to improve the ability to learn and remember. But the specifics of that process have remained hazy. Is it better to exercise before you learn something new? What about...

About half of fibromyalgia patients have damage to nerve fibers in their skin and other evidence of a disease called small-fiber polyneuropathy (SFPN), a small new study finds. Fibromyalgia is characterized by symptoms such as pain and tenderness, fatigue, and sleep and memory problems. The disorder...

Many people turn to herbal supplements to improve their health. In China, belief in traditional medicine is so strong that pharmacies peddle unprocessed herbs alongside modern pharmaceuticals. But an ingredient found in certain supplements may be as cancerous as smoking, two new studies have found. The...

A study published in the journal Nature Communications puts forthshocking new claims about the detrimental effects of sugar intake at levels currently considered safe. Researchers at the University of Utah fed mice a daily diet of 25 percent extra sugar — the equivalent of a healthy human...

In last week’s issue of Critical Review of Toxicology, Edward Calabrese, Ph.D., lays out his understanding of the mechanisms at play in hormesis.* Hormesis is a dose-response phenomenon characterized by low-dose stimulation and high-dose inhibition. Historically, dose-responses have been thought to occur in a linear fashion...