In a healthy person, insulin levels go up after eating, helping to process the meal.

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The breath-test technology relies on the idea that the biology of tumours can lead to the production of specific "volatile organic compounds", combinations of chemicals unlikely in a healthy person.

BBC: 'Promising results' for bowel cancer breath-test

In a healthy person the peacekeeper cells predominate.

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An economist might buy that, but you'll never convince the average person that it's healthy for one person to make billions in a few years.

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By the '90s, it took a shrewd business-person with a healthy dose of optimism to see the potential in these ruins.

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When a person feels confident, healthy, happy and grounded in their own skin and within their personal brand, the world will most typically take note and respond.

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