One study of biomarkers, for example, found that yoga influences brain chemicals by boosting serotonin levels, lowers inflammation, reduces oxidative stress and exerts a positive influence on other key elements of the human body that play a role in mental health.

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For example, he says, an advertiser for yoga vacations can display ads when the customer is searching for yoga vacations, reading an article about yoga vacations, browsing a Web site on holistic health or watching an online video on stress reduction.

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