Health guide
Caffeine Guide: How One Sodaslim Capsule Compares With Your Daily Drinks
One Sodaslim capsule has about 140 mg of caffeine, close to one 12-oz cup of brewed coffee (113-247 mg, per the FDA). The FDA says up to 400 mg a day is usually fine for healthy adults, so the capsule uses about a third of that. ACOG advises under 200 mg a day in pregnancy, and the label rules out pregnant and nursing women.
Written by the Sodaslim editorial teamUpdated
Start here
How much caffeine is in one Sodaslim capsule?
About 140 mg. The label prints 138 mg of caffeine anhydrous, and the green tea extract adds under 4 mg; the exact total is not on the label.
The green tea extract is standardized to under 3% caffeine, so 130 mg of it holds less than 4 mg. Green coffee bean extract also carries a small amount of caffeine that the label does not state (NIH ODS: Weight-loss supplements (HP)). Rounded, one capsule is about 140 mg.
Full detail on the stimulant itself is on the caffeine ingredient page.
Cup count
How does a Sodaslim capsule compare with coffee, tea and soda?
One capsule sits inside the range of a single 12-oz brewed coffee. The FDA publishes typical caffeine amounts for common drinks (FDA: How much caffeine is too much), and the table adds the capsule for comparison.
| Source | Caffeine | Share of 400 mg |
|---|---|---|
| Sodaslim, 1 capsule | About 140 mg | About 35% |
| Brewed coffee, 12 oz | 113-247 mg | 28-62% |
| Energy drink, 12 oz | 41-246 mg | 10-62% |
| Soft drink with caffeine, 12 oz | 23-83 mg | 6-21% |
| Black tea, 12 oz | 71 mg | 18% |
| Green tea, 12 oz | 37 mg | 9% |
Many mugs and takeout cups hold 16 oz or more, so a "cup" of coffee can carry much more than the table shows.
The daily limit
How much caffeine a day is too much?
For healthy adults, the FDA says 400 mg a day is not usually linked to harmful effects (FDA: How much caffeine is too much). That is about two to three 12-oz cups of brewed coffee. Mayo Clinic and MedlinePlus use the same figure (MedlinePlus: Caffeine) (Mayo Clinic: Caffeine limits).
One capsule uses about a third of that budget. Add two strong 12-oz coffees and you could reach 600 mg. Add one coffee and a soda, and you land near 300 mg.
Write down every caffeine drink for three days, using the FDA figures. If your usual total is already above 260 mg, a capsule would push most days past 400 mg. Cut something else first.
Very large amounts are dangerous. Taken quickly, about 1,200 mg can trigger seizures, according to the FDA (FDA: How much caffeine is too much). It has also warned about bulk pure caffeine powders, where a tiny scoop can hold a toxic dose (FDA: Highly concentrated caffeine guidance). A pre-measured 138 mg capsule is a different product, but taking extra capsules adds up fast. The label says: do not exceed the recommended dose.
Signs
What are the signs of too much caffeine?
The most common signs are jitters, trouble sleeping and a fast heartbeat. The FDA, MedlinePlus and Mayo Clinic list these effects (FDA: How much caffeine is too much) (MedlinePlus: Caffeine) (Mayo Clinic: Caffeine limits):
Physical signs
- Fast heart rate or palpitations
- Shakiness or muscle tremors
- Upset stomach or heartburn
- Headache or dizziness
- Needing to pass urine often
Mood and sleep signs
- Restlessness or nervousness
- Anxiety or irritability
- Trouble falling or staying asleep
- Feeling you need caffeine to function
If you notice these, cut back on other caffeine or stop the capsule. Chest pain, a racing or irregular heartbeat, or fainting needs medical care right away.
Pregnancy
How much caffeine is safe during pregnancy?
Less than 200 mg a day, according to the American College of Obstetricians and Gynecologists. ACOG says moderate intake below that level does not appear to be a major factor in miscarriage or preterm birth (ACOG: Caffeine in pregnancy).
One Sodaslim capsule alone would use about 70% of that amount. More to the point, the label says it is not for pregnant or nursing mothers, so the question of dose does not arise. Follow the label.
Caffeine also lasts longer in pregnancy. Its half-life is about 5 hours in most adults but can reach 15 hours late in pregnancy, StatPearls notes (StatPearls: Caffeine).
Who should limit it
Who should limit caffeine or ask a doctor first?
People with certain health conditions should ask a doctor before adding caffeine. MedlinePlus lists the main groups (MedlinePlus: Caffeine), and the Sodaslim label adds its own limits.
| Group | Why caffeine matters |
|---|---|
| Under 18 | The Sodaslim label says not for use by anyone under 18. |
| Pregnant or nursing | The label rules it out; ACOG advises under 200 mg a day in pregnancy (ACOG: Caffeine in pregnancy). |
| Heart rhythm problems or high blood pressure | Caffeine can raise heart rate and blood pressure (MedlinePlus: Caffeine). |
| Anxiety or sleep disorders | Caffeine can worsen nervousness and insomnia (MedlinePlus: Caffeine). |
| Reflux or stomach ulcers | Caffeine raises stomach acid (MedlinePlus: Caffeine). |
| Migraines | MedlinePlus lists migraines as a reason to check first (MedlinePlus: Caffeine). |
| Seizure disorders | Mayo Clinic says caffeine may worsen some conditions, including seizure disorders (Mayo Clinic: Caffeine limits). |
| Liver disease | Caffeine stays in the body longer (StatPearls: Caffeine). |
Medicines
Which medicines interact with caffeine?
Several kinds of medicine interact with caffeine, so ask a pharmacist before you add a caffeine capsule. These interactions appear in our sources:
| Medicine or product | What the source says |
|---|---|
| Other stimulants | Effects add up; MedlinePlus lists stimulants as an interaction (MedlinePlus: Caffeine). |
| Ephedrine or ephedra (ma huang) | Mayo Clinic says not to combine them with caffeine, because of risks to blood pressure, heart and brain (Mayo Clinic: Caffeine limits). |
| Certain antibiotics | Listed by MedlinePlus as an interaction (MedlinePlus: Caffeine). |
| Asthma and heart medicines | Listed by MedlinePlus as interactions (MedlinePlus: Caffeine). |
| Tizanidine | StatPearls advises avoiding the combination (StatPearls: Caffeine). |
| Bupropion | StatPearls advises caution, because both affect seizure risk (StatPearls: Caffeine). |
| Some antidepressants, antipsychotics and anti-anxiety drugs | Caffeine is processed by the liver enzyme CYP1A2, and interactions are reported (StatPearls: Caffeine). |
| Nadolol, atorvastatin, raloxifene | Interactions reported for green tea, which Sodaslim also contains (NCCIH: Green tea). |
The list is not complete. Bring the bottle or a photo of the label to your pharmacist; it takes a few minutes. The side effects page covers the other ingredients.
Timing
What time of day should I have caffeine to protect sleep?
Earlier is better. Caffeine peaks about an hour after you take it and its effects last 4 to 6 hours, MedlinePlus says (MedlinePlus: Caffeine). With a half-life of about 5 hours (StatPearls: Caffeine), half of a noon dose is still in your body at 5 pm.
- Morning, about 8 am
1 capsule with water. The label gives no time; the sales page suggests mornings, and caffeine lasts about 5 hours.
- Caffeine cut-off, about 2 pm
Skip later coffee, tea, soda and energy drinks so sleep is not disturbed.
- Count every cup
One capsule is about one cup of coffee. Healthy adults stay under 400 mg of caffeine a day from all sources.
- Night, 11 pm to 7 am
Poor sleep is the first sign that total caffeine is too high.
Caffeine limit (FDA: How much caffeine is too much); how long caffeine lasts (StatPearls: Caffeine); steady weight loss (CDC: Steps for losing weight).
The Sodaslim label says one capsule daily and gives no time. The sales page suggests the morning, which fits these numbers. A sensible cut-off for all caffeine is early afternoon.
Cutting back
How can I cut back on caffeine without feeling awful?
Count first
Log every coffee, tea, soda, energy drink and capsule for three days.
Go slowly
Drop about one drink every few days instead of quitting at once. Swap in half-caf or decaf.
Protect sleep
Move caffeine to the morning, drink water, and keep a fixed bedtime.
FAQ
Caffeine guide questions
Is one Sodaslim capsule the same as a cup of coffee?
Roughly, yes. One capsule has about 140 mg of caffeine, and the FDA puts a 12-oz brewed coffee at 113 to 247 mg. The capsule delivers its dose all at once, while coffee is usually sipped. Both count toward the same 400 mg daily limit for healthy adults.
How many cups of coffee is 400 mg of caffeine?
About two to three 12-oz cups of brewed coffee, the FDA says. Cup sizes and brewing methods vary a lot, so a large takeout coffee can hold more. With one Sodaslim capsule, most people have room for about one or two regular cups.
How long does caffeine stay in your system?
Caffeine has a half-life of about 5 hours in healthy adults, according to StatPearls. Half of a dose is still active five hours later. It lasts longer in late pregnancy, in liver disease and with some medicines, which is why morning use protects sleep.
How much caffeine can I have while pregnant?
ACOG advises less than 200 mg of caffeine a day during pregnancy. Moderate intake below that level does not appear to be a major factor in miscarriage or preterm birth. Caffeine capsules sold for weight, including Sodaslim, are labeled not for pregnant or nursing women.
What medicines should not be taken with caffeine?
Sources name stimulants, ephedrine, certain antibiotics, asthma and heart medicines, tizanidine and bupropion, plus some antidepressants and antipsychotics. Green tea extract adds nadolol, atorvastatin and raloxifene. Ask a pharmacist to check your full list before adding any caffeine supplement.
What happens if you have too much caffeine?
Too much caffeine can cause a fast heartbeat, jitters, anxiety, headache, upset stomach and poor sleep, the FDA says. About 1,200 mg taken quickly can cause seizures. Chest pain, a racing heartbeat or fainting needs medical care right away.
Who wrote this
Written and reviewed by
Plain-language pages built from the bottle label, the order page and linked public health sources such as NIH, FDA and CDC.
Last updated . Read our editorial standards and how we check reviews. This website is run by a U.S. retail desk for Sodaslim, not by the manufacturer. We earn money when you buy through our order links.
Keep reading
More about Sodaslim
Caffeine in Sodaslim
About 140 mg per capsule: how Sodaslim compares with coffee, tea and soda, and how to keep your daily total in range.
Read moreCaffeine anhydrous
138 mg of caffeine anhydrous, about one cup of coffee. What it does, how long it lasts and who should skip it.
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Side effects
Caffeine effects, medicine interactions, the rare liver signs to know and a quick check before you start.
Read moreLicensed U.S. retail desk for Sodaslim
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