Explaining the science behind Phil Mickelson's coffee and fasting combo (

The sight of Phil Mickelson sipping from an oversize coffee mug during tournament rounds has become almost as ubiquitous as his signature thumbs-up. As a tireless pitchman, Mickelson no doubt has recognized the branding opportunity his historic PGA Championship win has provided his fledgling Coffee For Wellness brand.

But the question remains—does the stuff actually work?

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