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Caffeine Sensitivity and Supplements: Signs, Limits, When to Stop
Caffeine sensitivity means a small amount gives you a big reaction, and supplements can hide that amount. A SodaSlim capsule (not a drink) prints 138 mg of caffeine anhydrous, 34.5% of the 400 mg a day the FDA gives for most healthy adults. The extracts add a little more.
Written by the SodaSlim label deskUpdated · 4 min read
What are the signs of too much caffeine?
The usual signs are a faster heartbeat, jitters, anxiety, a headache and trouble sleeping. They can show up at amounts that suit other people.
The FDA lists fast heart rate, palpitations, insomnia, anxiety, jitters, nausea and headache (FDA, Spilling the beans: how much caffeine is too much). Cleveland Clinic adds muscle twitching and confusion as serious signs (Cleveland Clinic, Caffeine overdose).
| What you notice | Meaning | Next step |
|---|---|---|
| Jitters, restlessness, poor sleep | Often too much for you | Cut caffeine from every source; ask a pharmacist |
| Pounding heart | Needs a doctor's view | Stop the capsule; call your doctor |
| Chest pain, fainting, seizure, confusion | Emergency | Call 911 or Poison Help, 1-800-222-1222 |
Who reacts more strongly to caffeine?
People with some conditions or medicines react more strongly. Anxiety, an irregular heartbeat and high blood pressure are the common ones.
Cleveland Clinic says some conditions and medicines raise sensitivity (Cleveland Clinic, Caffeine overdose). MedlinePlus says people with anxiety, arrhythmia, high blood pressure or pregnancy should check with a provider (MedlinePlus, Caffeine).
The label adds: not for under 18s or pregnant or nursing mothers.
Is 138 mg of caffeine a lot for someone sensitive?
It can be. 138 mg sits inside the 113 to 247 mg range of a 12 fl oz coffee, but a sensitive person may feel it more.
Green coffee extract adds caffeine the label does not print. Count coffee, tea, soda and energy drinks too. Stopping caffeine suddenly can cause headache and irritability (MedlinePlus, Caffeine). Answer these seven questions first, and see side effects.
SodaSlim: 30 capsules, 30-day bottle1 capsule a day · 2, 3 or 6 bottles · price and guarantee terms at checkout
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Know your caffeine first. A bottle is 30 capsules, so 3 and 6 bottles cover 90 and 180 days.
Price and money-back terms show at checkout. The ingredients page lists every line.
90-day supply
3 bottles: 90 days
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180-day supply
6 bottles: 180 days
180capsules · price shown at checkout
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Order 6 bottlesA 2-bottle pack is also shown by the brand. Check your medicines with your doctor or pharmacist before you order.
FAQ01
SodaSlim questions people ask
How do I know if I am sensitive to caffeine?
Small amounts bring jitters, a racing heart or bad sleep. Track every cup for a week and note symptoms. If they appear, ask a doctor or pharmacist before adding a caffeine capsule.
Can a caffeine capsule cause anxiety?
It can in some people. Caffeine may increase anxiety symptoms (Mayo Clinic, Caffeine: how much is too much). If you already live with anxiety, ask a clinician before taking any caffeinated supplement.
Does green tea count toward my caffeine total?
Yes. A 12 fl oz cup of green tea has about 37 mg, per the FDA. Add it to the capsule's 138 mg, along with coffee and soda.
Sources (4)
- Spilling the Beans: How Much Caffeine Is Too Much?U.S. Food and Drug Administration, 2024
- Caffeine: How much is too much?Mayo Clinic, 2025
- CaffeineMedlinePlus (U.S. National Library of Medicine), 2021
- Caffeine OverdoseCleveland Clinic, 2024
Who wrote this02
Written and reviewed by
Pages built from the label, the seller’s materials and linked NIH, FDA, FTC, Mayo Clinic and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site of Thesodaslim, a USA authorized SodaSlim retailer. It is not the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
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