Caffeine vs WaterCaffeine chart
Hidden Sources of Caffeine: Chocolate, Painkillers, Pre-Workout, Gum and More
Hidden sources of caffeine can add 100+ mg to your day. See the caffeine in chocolate, Excedrin, pre-workout, gum, iced tea, decaf and kombucha, with real mg numbers.
The short answer
- Painkillers: a dose of 2 Excedrin Extra Strength has 130 mg, more than a cup of coffee (95 mg).
- Pre-workout: usually 150–400 mg per serving, often more than a Grande coffee.
- Chocolate: about 23–24 mg per oz (28 g) of dark chocolate, about 9 mg in a milk chocolate bar.
- Also watch: caffeine gum (50–100 mg a piece), bottled and fast-food iced tea (up to 111 mg), coffee ice cream (up to 45 mg per half cup), "refreshers", Sunkist and Barq's, and decaf (2–15 mg a cup, up to 25 mg for a Grande).
If you're cutting back, sleeping badly or keeping an eye on caffeine in pregnancy, coffee is the obvious thing to count. The hidden sources of caffeine are what trip people up: a headache pill, a pre-workout scoop, a square of chocolate after dinner, a big fast-food iced tea. Some of these carry more caffeine than an espresso.
The FDA points out that energy bars, ice cream, chewing gum, dietary supplements and over-the-counter medicines can all have caffeine added, and that when caffeine comes from an ingredient like chocolate, "caffeine" won't appear on the ingredient list at all. Here's what's actually in each, using the values from the Caffeine vs Water drink catalog.
Hidden sources of caffeine at a glance
| Item | Serving | Caffeine |
|---|---|---|
| Pre-workout (strong, e.g. Ghost Legend, C4 Ultimate) | 1 scoop | 300 mg |
| Caffeine pill (NoDoz, Vivarin) | 1 tablet | 200 mg |
| Excedrin Extra Strength | 2 caplets | 130 mg |
| Panera Sweet Iced Tea | 20 oz / 591 ml | 111 mg |
| AWAKE Chocolate bar | 1 bar | 101 mg |
| Caffeine gum (Run Gum Extra Strength, Military Energy Gum) | 1 piece | 100 mg |
| Caffeinated water (Avitae 90) | 16.9 oz / 500 ml | 90 mg |
| Starbucks Pink Drink or Refresher, Grande | 16 oz / 473 ml | 50 mg |
| Ben & Jerry's Coffee Buzz ice cream | ½ cup | 45 mg |
| Starbucks Decaf Pike Place, Grande | 16 oz / 473 ml | 25 mg |
| Dark chocolate, 60–69% | 1 oz / 28 g | 24 mg |
| Decaf coffee | 8 oz / 240 ml | ~3 mg (2–15) |
Excedrin and other painkillers with caffeine
Several headache and period-pain medicines contain caffeine, listed on the label as a "pain reliever aid". The Excedrin Extra Strength label lists 65 mg of caffeine per caplet, and the adult dose is two caplets, so 130 mg per dose. The label itself warns that a dose "contains about as much caffeine as a cup of coffee" and tells you to limit other caffeine while taking it.
| Medicine | Dose | Caffeine |
|---|---|---|
| Excedrin Extra Strength | 2 caplets | 130 mg |
| Excedrin Migraine | 2 caplets | 130 mg |
| Excedrin Tension Headache | 2 caplets | 130 mg |
| Midol Complete | 2 caplets | 120 mg |
| Anacin | 2 tablets | 64 mg |
| NoDoz or Vivarin | 1 tablet | 200 mg |
The dosing adds up fast. The Excedrin label allows up to 8 caplets in 24 hours, which is 520 mg of caffeine before you've had a drink. A late-evening dose for a headache (130 mg) takes about 8 hours to fall under 50 mg with a typical half-life, so it can easily be the reason you're awake at 2 am. If you take caffeinated medicine regularly, check the label and talk to a pharmacist or doctor.
Pre-workout: the biggest hidden dose
Pre-workout powders are the most caffeine-dense thing most people take, and a scoop is easy to underestimate because it doesn't look or taste like coffee.
| Pre-workout | Serving | Caffeine |
|---|---|---|
| Gorilla Mode Pre | 2 scoops | 400 mg |
| Legion Pulse | 1 scoop | 350 mg |
| Woke AF | 1 scoop | 333 mg |
| Ghost Legend, C4 Ultimate, Pre JYM | 1 scoop | 300 mg |
| Bucked Up, C4 Extreme, Alani Nu Pre-Workout | 1 scoop | 200 mg |
| ON Gold Standard Pre | 1 scoop | 175 mg |
| C4 Original | 1 scoop | 150 mg |
A 2023 meta-analysis of caffeine and sleep calculated that a standard pre-workout serving (217.5 mg) should be taken at least 13.2 hours before bed to avoid losing sleep. For a 6 pm gym session, that's a 7 am bedtime. A 300 mg scoop at 6 pm would still leave well over 50 mg in a typical adult at midnight, and it takes about 14.5 hours to fall below that line. Evening lifters are usually better off with a stimulant-free pre-workout. Pre-workouts also count toward the 400 mg daily limit covered in how much caffeine is too much.
Caffeine in chocolate
Cocoa naturally contains caffeine, so the darker the chocolate, the more caffeine it has. Milk chocolate has little.
| Chocolate | Serving | Caffeine |
|---|---|---|
| AWAKE Chocolate bar (caffeinated) | 1 bar | 101 mg |
| AWAKE Chocolate bite | 1 bite | 50 mg |
| Dark chocolate, 60–69% | 1 oz / 28 g | 24 mg |
| Dark chocolate, 70–85% | 1 oz / 28 g | 23 mg |
| Hershey's Special Dark bar | 1.45 oz / 41 g | 20 mg |
| Milk chocolate bar | 1.5 oz / 43 g | 9 mg |
| Hot cocoa | 8 oz / 237 ml | 5 mg |
| Starbucks Hot Chocolate, Tall / Grande / Venti | 12 / 16 / 20 oz | 20 / 25 / 35 mg |
A few squares of dark chocolate after dinner is roughly half a cup of tea. On its own that's rarely a problem, but a large bar or a caffeinated "energy" chocolate is a real dose. Coffee-flavored desserts count too: Häagen-Dazs Coffee ice cream has about 22 mg and Ben & Jerry's Coffee Buzz about 45 mg per half cup.
Gum, caffeinated water and "refreshers"
Energy gum is easy to chew one piece after another. Run Gum has about 50 mg a piece and its Extra Strength version about 100 mg, the same as Military Energy Gum. Three pieces on a long drive is 300 mg.
Caffeinated water looks like a hydration drink but isn't caffeine-free: Avitae comes in 45, 90 and 125 mg versions per 16.9 oz bottle, Water Joe has about 70 mg per 20 oz and Hint Kick about 60 mg per 16 oz.
Fruity "refreshers" don't taste like coffee, but they are caffeinated. A Grande Starbucks Refresher or Pink Drink has about 50 mg and a Trenta Strawberry Açaí about 100 mg. A Medium Dunkin' Refresher has about 99 mg.
Iced tea: bigger than you'd think
Iced tea feels light, but fast-food cups and big bottles hold a lot of it. A 20 oz Panera Sweet Iced Tea has about 111 mg, more than a cup of drip coffee.
| Iced tea | Size | Caffeine |
|---|---|---|
| Panera Sweet Iced Tea | 20 oz / 591 ml | 111 mg |
| Pure Leaf Unsweetened | 18.5 oz / 547 ml | 54 mg |
| Gold Peak Unsweetened | 18.5 oz / 547 ml | 48 mg |
| AriZona Iced Tea Lemon | 23 oz / 680 ml | 43 mg |
| Snapple Lemon or Peach Tea | 16 oz / 473 ml | 37 mg |
| Lipton Iced Tea Lemon | 16.9 oz / 500 ml | 21 mg |
| Brisk Lemon Iced Tea | 12 oz / 355 ml | 11 mg |
Hot tea has more caffeine than people expect too, especially strong black tea. The full breakdown is in caffeine in tea.
Does kombucha have caffeine?
Usually a little. Kombucha is fermented from black or green tea, so it carries some of the tea's caffeine. The amount varies with the tea and the recipe, and many labels don't list it. If you're avoiding caffeine completely, pick a brand that states its caffeine or is brewed from herbal tea.
Decaf and sodas you might assume are caffeine-free
Decaf isn't no-caf. The FDA says decaf coffee typically has 2 to 15 mg per 8 oz cup. Most cups are at the low end, but big sizes add up: a Grande Starbucks Decaf Pike Place is about 25 mg, a Large Dunkin' decaf about 15 mg. For most people that's negligible, but if you're very sensitive, see how much caffeine is in decaf coffee.
Surprise sodas. Sunkist Orange has about 19 mg and regular Barq's Root Beer about 22 mg per can, while most orange sodas and root beers have none. The full list, including every caffeine-free option, is in caffeine in soda.
How hidden caffeine adds up
Here's an ordinary day: two coffees in the morning (190 mg), a Grande Refresher at lunch (50 mg), a pre-workout at 5:30 pm (200 mg), two Excedrin for a headache at 8 pm (130 mg) and some dark chocolate at 9 pm (24 mg). That's 594 mg, well over the 400 mg daily limit, and only 190 mg of it was "coffee". A lot of it lands late in the day, when it matters most for sleep; see how caffeine affects sleep.
That's the problem with hidden caffeine: each item looks small, so it never gets counted. In Caffeine vs Water you can log a pill, a scoop or a piece of gum as easily as a coffee, and the day planner shows what a planned evening dose would leave at bedtime before you take it. You can also check a single item against your bedtime in the bedtime caffeine calculator. If you're pregnant, the lower 200 mg limit makes these sources matter even more; see caffeine and pregnancy.
Frequently asked questions
What are hidden sources of caffeine?
The most common are painkillers such as Excedrin (130 mg per 2-caplet dose), pre-workout powders (150–400 mg a scoop), caffeine gum (50–100 mg a piece), dark chocolate (about 24 mg per oz), bottled and fast-food iced tea, coffee ice cream, fruity refreshers, some sodas like Sunkist and Barq's, and decaf coffee (2–15 mg a cup).
How much caffeine is in Excedrin?
Excedrin Extra Strength has 65 mg of caffeine per caplet, so the usual 2-caplet dose has 130 mg, more than an 8 oz cup of coffee. Excedrin Migraine and Tension Headache also have 130 mg per 2-caplet dose.
How much caffeine is in chocolate?
Dark chocolate has about 23–24 mg per 1 oz (28 g). A 1.5 oz milk chocolate bar has about 9 mg, and a cup of hot cocoa about 5 mg.
How much caffeine is in pre-workout?
Most pre-workouts have 150–400 mg per serving. C4 Original has about 150 mg a scoop, many popular brands 200–300 mg, and some two-scoop servings 400 mg, a full day's limit for most adults.
Does kombucha have caffeine?
Usually a small amount, because it's fermented from black or green tea. The exact amount varies by brand and batch and often isn't on the label, so treat it as a small dose rather than caffeine-free unless the brand says otherwise.
Does decaf coffee have caffeine?
Yes, a little. The FDA says decaf typically has 2 to 15 mg per 8 oz cup. A Grande Starbucks Decaf Pike Place has about 25 mg.
Sources
- U.S. FDA. Spilling the Beans: How Much Caffeine is Too Much?
- DailyMed (U.S. National Library of Medicine). Excedrin Extra Strength (acetaminophen, aspirin and caffeine) drug label.
- Gardiner C, et al. The effect of caffeine on subsequent sleep: a systematic review and meta-analysis. Sleep Med Rev, 2023.
- Mayo Clinic. Caffeine content for coffee, tea, soda and more.
- Brand nutrition pages and caffeine databases, as compiled for the Caffeine vs Water drink catalog (September 2026).
General wellness information, not medical advice. If you're pregnant, have a heart condition, or take medication that affects caffeine, check your limits with a doctor.