"We found that self-affirmation completely eliminates the effects of chronic stress, " Creswell observed.

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Welch MG, Welch-Horan TB, Anwar M, Anwar N, Ludwig RJ, Ruggiero DA. Brain effects of chronic IBD in areas abnormal in autism and treatment by single neuropeptides secretin and oxytocin.

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Despite the fact that these drugs have been on the market for more than two decades, like any class of drugs that are prescribed for chronic use, their effects over decades of use are unknown.

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Facing these chronic problems head on would have profound effects, lasting long beyond delivery.

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But placebos can have powerful beneficial effects for many health conditions, ranging from depression and chronic pain to Parkinson's disease.

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For those with chronic insomnia, just four to six sessions of CBT can work better than pills, with fewer side effects, multiple small studies suggest.

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For chronic migraines, doctors also prescribe beta blockers, antiseizure medications and antidepressants, but they have significant side effects and help only about 50% of patients about 50% of the time.

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While the surgeries are successful at helping people lose weight and reduce their risk for hypertension, diabetes and other chronic illnesses -- patients have to carefully weigh the benefits of the procedure with the serious risks, side effects and even death in some cases.

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