Dan Greenfield has a lot on his plate. One glance at his calendar and it’s easy to see why.

As The Post’s chief of staff, he spends his days racing between meetings, settling office disputes and juggling high-level projects far above my pay grade as a wellness reporter.

“I’ve been stressed my entire adult life,” Dan, 58, admitted. “I work in a very fast-paced, hard-driving environment, and I have been doing it for a very long time.”

But as I contend with nonstop deadlines, the 24-hour news cycle and life as a young, broke New Yorker, I couldn’t help but wonder: Who’s really more stressed — the 25-year-old rookie reporter or the seasoned exec?

To find out, we turned to Eli Health , a Montreal startup behind the world’s first at-home cortisol test , which delivers a snapshot of your

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