Safety guide
Slim Coffee Booster Side Effects and Safety
Advertorial · Slim Coffee Australia editorial team · Updated 12 October 2026 · Research-based, not personally tested
Quick answer
Most likely side effects of Slim Coffee Booster are mild: bloating or wind from the fibre, and jitters or poor sleep if you're sensitive to caffeine. Check with a GP first if you're pregnant, breastfeeding, take medication or have a health condition.
Key takeaways
- Possible digestive changes from the fibre, especially at first
- Caffeine-sensitive people should take care
- Check with a GP if pregnant, on medication or managing a health condition
- We couldn't verify a TGA (ARTG) listing
No supplement is right for everyone. Here are the possible side effects and precautions to know about, based on the listed ingredients. This is general information, not medical advice.
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In this article
Possible side effects
- Digestive changes such as bloating, wind or changes in bowel habits, from the fibres (psyllium, resistant dextrin), especially in the first days.
- Jitteriness, a racing heart or trouble sleeping if you're sensitive to caffeine, since it's added to coffee and some extracts contain caffeine.
- Rarely, concentrated green tea extract has been linked to liver problems. Stop and see a doctor if you notice yellowing skin or eyes, dark urine or abdominal pain.
- Allergic reactions to any ingredient.
Who should avoid it or speak to a GP first
- Pregnant or breastfeeding women, and anyone under 18
- People taking diabetes medication (mulberry leaf and fibres may affect blood sugar)
- People on blood pressure, heart, thyroid or blood-thinning medicines
- Anyone with liver or kidney disease, a digestive condition, or a history of bowel obstruction or swallowing difficulty
- Anyone sensitive to caffeine
Opens the seller's website · Prices in A$ · One-time purchase
Medication timing
Fibre supplements like psyllium can slow or reduce the absorption of some medicines. Pharmacists commonly suggest taking medicines at least two hours apart from fibre. Ask your pharmacist about your specific medicines.
Is Slim Coffee Booster TGA approved?
The seller describes it as a food supplement. We couldn't verify an ARTG (Australian Register of Therapeutic Goods) listing for it. Food products aren't 'approved' by the TGA in the way medicines are, so be cautious of any claim that it's TGA approved.
May suit you if…
- You already drink coffee every day and want a simple add-in
- You prefer a one-time purchase with no subscription
- You're pairing it with sensible eating and regular movement
Skip it or ask a GP first if…
- You're pregnant, breastfeeding or under 18
- You take regular medication, especially for diabetes, blood pressure or the heart
- You're sensitive to caffeine or have a liver, kidney or digestive condition
How to reduce the chance of side effects
- Stick to one sachet a day.
- Drink plenty of water.
- Take it in the morning if caffeine affects your sleep.
- Read the warnings on the pack, and stop if anything feels wrong.
Possible side effects by ingredient
| Ingredient | Possible effects | How to reduce |
|---|---|---|
| Fibres (psyllium, dextrin) | Wind, bloating, fullness | Drink water; give it a week |
| Caffeine sources | Jitters, fast heartbeat, poor sleep | Take before midday; cut other caffeine |
| Green tea extract | Rare liver injury | Stop and see a doctor if symptoms appear |
| White kidney bean | Wind, loose stools | Usually settles |
| L-carnitine | Nausea, stomach upset | Take with food |
When to stop and see a doctor
- Yellowing of the skin or eyes, dark urine or upper abdominal pain.
- Chest pain, a racing or irregular heartbeat.
- Difficulty swallowing or severe constipation.
- Any allergic reaction such as rash, swelling or breathing difficulty (call 000 in an emergency).
Read next: How to take it safely · Refund if it doesn't agree with you
Frequently asked questions
Does Slim Coffee Booster have side effects?
Possible effects include digestive changes from the fibre and caffeine-related effects. Rarely, green tea extract has been linked to liver issues. Stop using it and see a doctor if you have concerns.
Is Slim Coffee Booster safe?
Its ingredients are commonly used, but no supplement suits everyone. Check with your GP or pharmacist if you're pregnant, take medication or have a health condition.
Can I take Slim Coffee Booster while pregnant?
Speak to your doctor first. It's best avoided during pregnancy and breastfeeding unless your doctor advises otherwise.
Is Slim Coffee Booster TGA approved?
We couldn't verify an ARTG listing. It's sold as a food supplement.
Can Slim Coffee Booster interact with medication?
Psyllium can slow the absorption of some medicines, and mulberry leaf may affect blood sugar. Ask your pharmacist, and space it two hours from tablets.
Will it keep me awake?
It might if you're caffeine-sensitive, since you add it to coffee and some ingredients contain caffeine. Have it in the morning.
Ready to try Slim Coffee Booster?
One sachet in your morning coffee. No subscription, 30-day money-back guarantee.