Guides

30 to 60 minutes after waking, an hour before training, and about nine hours before bed for a 100 mg cup. The cortisol claim checked, night and before-bed cut-offs by brand, the empty-stomach evide...

Black mushroom coffee is 5 to 10 calories and does not break a 16:8 fast. What breaks one is collagen, coconut milk, MCT oil or sweeteners in latte-style blends. The answer for each kind of fast, t...

Yes, for many people, and it is mostly the coffee: colon motility rises within four minutes of regular or decaf coffee. What each ingredient does to your gut, why some blends cause diarrhea, and ho...

Seven benefits of mushroom coffee for men, ranked by the strength of their evidence: the ones you feel come from caffeine, theanine and ashwagandha at doses a cup can carry. Each trial dose beside ...

Most men treat energy like a tap: pour in more coffee, get more output. But the 2pm slump has specific, predictable causes. The first is adenosine, the molecule that builds up in your brain over the…

Most men do not have an energy problem. They have a sequencing problem. The same total amount of sleep, caffeine, and food produces completely different mornings depending on the order you take them…

Walk down the functional coffee aisle and you will see the same roster over and over: Lion’s Mane, cordyceps, reishi, chaga, turkey tail, sometimes maitake and shiitake. Brands present these as one…

The term comes from mid-20th-century researchers who were looking for natural substances that could help the body resist stress without the crash-and-rebound pattern of stimulants. To earn the label…

Answering email takes alertness. Writing a proposal, building a financial model, coding a feature or studying for a license exam takes something rarer: the ability to stay locked on one hard thing…