Key takeaways
- More caffeine isn't always better. A moderate dose can give you alertness without the crash.
- L-theanine is an amino acid found naturally in tea, and research suggests it pairs well with caffeine.
- The FDA says up to 400 mg of caffeine a day is generally fine for most healthy adults.
You know the cycle. First coffee: amazing. Second coffee: jittery, heart racing a little, focus scattered. 3 p.m.: crash, so you reach for a third. If that sounds familiar, the problem may not be caffeine itself. It may be how much you're taking at once, and what you're taking it with.
How much caffeine are you really drinking?
Coffee is wildly inconsistent. The FDA lists a 12-ounce cup of regular brewed coffee at anywhere from 113 to 247 mg of caffeine. Coffee-shop sizes can go far beyond that. So two "normal" coffees can easily put you past 400 mg, which is the daily amount the FDA says is not generally associated with negative effects for most healthy adults.
Everyone's sensitivity is different, but if you've felt shaky, anxious or wired-then-tired, you may simply be overshooting.
Meet L-theanine, tea's secret weapon
Ever notice that green tea feels calmer than coffee, even though it has caffeine? A big part of that is L-theanine, an amino acid found naturally in tea leaves. It doesn't make you sleepy. People describe it as taking the "edge" off.
Researchers have studied the pairing directly. In a 2008 placebo-controlled study published in Nutritional Neuroscience, 27 healthy adults took 50 mg of caffeine with 100 mg of L-theanine. The combination improved both speed and accuracy on an attention-switching task at 60 minutes and reduced how easily people were distracted during a memory task. The authors concluded the combo was beneficial for cognitively demanding work.
Notice the caffeine dose in that study: 50 mg, roughly half a typical cup of coffee. You don't need a giant dose to feel a difference.
Why we built Energy the way we did
Our Energy strips are designed around that "less, but smarter" idea. Each cranberry strip has:
- 50 mg caffeine from green tea, about half a cup of coffee
- 30 mg L-theanine to round out the lift
- 1,000 mcg vitamin B12 (methylcobalamin), a B vitamin that helps your body turn food into energy*
To be clear and honest: our L-theanine amount is lower than the 100 mg used in that study, so we don't claim to replicate its results. What we built is a gentle, predictable lift you can take anywhere, with no coffee run, no sugar-loaded energy drink and no 300 mg surprise.
How to use caffeine smarter
- Start small. Try 50 mg and see how you feel before adding more.
- Mind the clock. Caffeine can linger for hours. If sleep is a struggle, keep it to the morning and early afternoon.
- Count every source. Coffee, tea, soda, pre-workout and energy drinks all add up.
- Pair it with food and water. Caffeine on an empty stomach hits some people harder.
FAQ
Can I take an Energy strip with my coffee?
Many people swap one coffee for a strip. If you do both, count the total. One strip is 50 mg.
Will it make me jittery?
50 mg is a modest dose, but caffeine sensitivity varies. If you're very sensitive, try it on a day you skip coffee so you know how it feels on its own.
When should I take it?
Morning or early afternoon works best for most people. One strip a day, max.
Who should skip it?
Anyone pregnant, nursing, sensitive to caffeine or on medications that interact with it should talk to their doctor first.
DOSIS ENERGY
A smooth lift, no coffee run
50 mg caffeine from green tea, L-theanine and B12 in a cranberry strip. 30 strips per tin, from $33.60.
Keep reading
Sources
- U.S. FDA: Spilling the Beans, How Much Caffeine Is Too Much?
- Owen et al., The combined effects of L-theanine and caffeine on cognitive performance and mood, Nutritional Neuroscience (2008)
*These statements have not been evaluated by the Food and Drug Administration. DOSIS products are not intended to diagnose, treat, cure, or prevent any disease. This article is for general education and isn't medical advice. If you're pregnant, nursing, taking medication or managing a health condition, check with your doctor before starting any supplement.