In one recent study, the participants who took standardized word- and picture-recall tests scored significantly better several hours after taking a 1,600-milligram (mg) capsule of dried lemon balm leaf than when they were given a placebo.

theory: The herb binds to brain chemical receptors, enhancing their ability to send and receive information.

What òî do: Add three teaspoons (or three tea bags) of dried lemon balm to two cups of boiling water. Steep for five minutes and then strain. Drink daily. Or take a 1,600-mg supplement daily.

British researchers say there’s no clear evidence that spinal fusion surgery for chronic low back pain is better than intensive rehabilitation in relieving discomfort.

What’s more, these surgeries may not be as cost-effective as other interventions, they add.

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