Why Does Coffee Make Me Sleepy? What the Research Says
Why coffee can leave you sleepy: going without caffeine, yesterday's late cup, the same dose every day and...
guide
Everything you need to understand about Uncaffed, our mission, and the science behind caffeine. From time to time we share some special news and updates.
What Is Magnesium Bisglycinate? Glycinate vs Bisglycinate
What magnesium bisglycinate is, whether glycinate is the same thing, how to read the elemental magnesium on a...
Caffeine and Anxiety: How Much Is Too Much?
How much caffeine is too much? The official daily and single-dose figures, what the studies found on caffeine...
Why Caffeine Stopped Working: What the Research Says
Why caffeine stopped working: the research on getting used to a regular dose, withdrawal relief, sleep and the...
Caffeine Tolerance: How Long Does It Take to Reset?
A caffeine tolerance reset takes about two weeks for most people. What the studies measured on how fast...
How Much Caffeine Is in High Street Coffee? UK Chains Compared
A 350 ml americano is 89 mg of caffeine at Starbucks and 325 mg at Costa, over three...
Caffeine in Pregnancy: Why the 200 mg Limit Is Higher Than the Evidence Supports
The NHS limit is 200 mg a day. A newborn takes four days to clear one dose and...
How Long Does Caffeine Stay in Your System?
Caffeine halves roughly every 6 hours and takes about 30 hours to clear. Because every drink decays on...
L-Theanine and Caffeine: What the Research Actually Shows
L-theanine and caffeine is one of the most studied pairings in nootropics, and two well-designed trials found the...
Energy Drinks vs Coffee: Which Actually Has More Caffeine?
At four of the five biggest UK coffee chains, a medium americano has more caffeine than a can...
Caffeine Withdrawal Timeline: What Happens, Hour by Hour
Caffeine withdrawal starts 12 to 24 hours after your last dose and peaks between 20 and 51 hours....
The Best Time to Drink Coffee for Peak Performance
Most people drink their first coffee within minutes of waking. Physiologically that is one of the least effective...
