Caffeine: the hidden sources beyond coffee

If caffeine affects you - jitters, a racing heart, broken sleep, anxiety - the natural move is to cut back on coffee. People often cut the coffee and still feel wired, because coffee is only part of their caffeine.

Caffeine is dose-dependent, and what matters is your total across the day. Here are the other sources that add to it.

Caffeine is a load you accumulate

Caffeine works by blocking adenosine - the neurotransmitter that builds up through the day and makes you feel sleepy - which is what produces alertness, and, past a point, jitteriness, a faster heart and disrupted sleep.¹

Caffeine accumulates. It has a long half-life, so a morning coffee, an afternoon tea and an evening square of dark chocolate all stack into one running total.¹ Sensitivity to that total varies a lot between people.² (More on that in caffeine sensitivity explained.)

The caffeine sources

Below are the caffeine-containing foods and drinks in the Triggerbites ingredient database - the ones beyond plain coffee that are easiest to overlook.

black coffee

espresso

black tea

green tea

oolong tea

pu-erh tea

chai tea

earl grey tea

english breakfast tea

matcha

matcha latte

yerba mate

cola

dark chocolate

cocoa

The big one people miss is tea. All true tea - black, green, oolong, white, pu-erh, chai, matcha - comes from the same caffeinated plant, and matcha, being whole powdered leaf, is especially concentrated. Yerba mate is caffeinated too. So is cola, and so is chocolate - dark chocolate and cocoa most of all, because caffeine rides along with the cocoa solids.

A couple of things this list can't show: decaf coffee and tea still contain a small amount of caffeine, and energy drinks and many soft drinks add it directly.

Finding your pattern

If caffeine is something you're sensitive to, the useful things to track are your total daily caffeine across all of these sources, the timing of the last one (afternoon caffeine is a common hidden cause of poor sleep), and how it lines up with symptoms like jitteriness, palpitations or a restless night.

Where Triggerbites fits in

This list comes straight from the food data inside Triggerbites, which tags every ingredient for caffeine alongside 40+ other trigger criteria.

So when you log your day in plain language, Triggerbites extracts the ingredients, tags every caffeine source including the tea and the chocolate, and correlates the total with your symptoms and sleep across time windows. You see the running total behind "I only had one coffee."

It takes seconds a day, and it catches the caffeine you forgot you had.

Log your day in 30 seconds

Text, voice or photo. Log as you go, or recap it all in the evening.

Your food, broken down

Meals become ingredients and sensitivity profiles: histamine, salicylates, FODMAPs, allergens, and even the additives on packaged food.

Everything in the same journal

Symptoms, supplements, sleep, stress, exercise and mood, beside what you ate.

See what repeats over time

Patterns between what you eat and how you feel, including delayed reactions that show up days later.

Triggerbites Features

• Log your day in 30 seconds: Text, voice or photo. Log as you go, or recap it all in the evening.
• Your food, broken down: Meals become ingredients and sensitivity profiles: histamine, salicylates, FODMAPs, allergens, and even the additives on packaged food.
• Everything in the same journal: Symptoms, supplements, sleep, stress, exercise and mood, beside what you ate.
• See what repeats over time: Patterns between what you eat and how you feel, including delayed reactions that show up days later.

For the science, see caffeine sensitivity explained and heart palpitations after eating.

Live, love, log. 🧡