HSOS #51: The 90-Minute Coffee Rule: Fact or Fiction?

Her Season of Strength · Jul 16, 2026 · 21m

I keep seeing influencer after influencer talking about coffee and cortisol or some version of this, and a few of the claims bugged me, so I decided to actually look into the research myself and discuss on here. Here is the short version: your cortisol is supposed to rise in the morning, that part is completely normal, and while caffeine does add a little to that rise, your body adapts a lot more than people are giving it credit for. I also get into that popular rule about waiting 90 minutes before your first cup, and talk about why this whole conversation looks a little different once you…