Five times larger than all that came before.

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An expert in clinical trials explains.

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Does it even work?

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This may follow a 19th-century paradox.

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But there's more to the story than those influencer claims.

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How to reduce your risk.

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An expert explains.

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Keeping weight off can be even harder than losing it.

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Here's what actually wears you out.

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As effective as energy drinks and gels – but natural.

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