Ingredients explained
Slim Coffee Booster Ingredients, Explained
Advertorial · Slim Coffee Australia editorial team · Updated 12 October 2026 · Research-based, not personally tested
Quick answer
Slim Coffee Booster lists seven ingredients: green coffee bean extract, green tea extract, L-carnitine, mulberry leaf extract, resistant dextrin, psyllium husk and white kidney bean extract. The seller doesn't publish how much of each is in a sachet, or the caffeine content, so check the pack label.
Key takeaways
- Seven listed ingredients: plant extracts, two soluble fibres and L-carnitine
- Amounts per sachet aren't published by the seller
- Caffeine and allergen details aren't stated
- Research on single ingredients is modest and doesn't prove the blend works
Slim Coffee Booster is a powdered food supplement that you stir into coffee. The seller lists seven key ingredients: plant extracts, two soluble fibres and L-carnitine. Here's what each one is and what research on it generally shows.
One important caveat first: the seller doesn't publish the amount of each ingredient per sachet. That makes it impossible to compare the doses with those used in studies.
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In this article
Green coffee bean extract
Extracted from unroasted coffee beans, it's a natural source of chlorogenic acid. Research on the standalone extract is mixed, and many trials have been small or short. It may contain some caffeine.
Green tea extract
Contains catechins (such as EGCG) and naturally occurring caffeine. Studies show at most modest effects on metabolism. Concentrated green tea extracts have rare links to liver problems, which is why Australia's TGA has required warnings on some green tea extract products.
Opens the seller's website · Prices in A$ · One-time purchase
L-carnitine
A compound your body makes that helps move fatty acids into cells to be used for energy. Supplementing it in healthy adults has shown small and inconsistent results.
Mulberry leaf extract
Used in traditional practice and mostly studied for blood-sugar responses after carbohydrate-rich meals. The evidence is still early-stage. If you take diabetes medication, ask your doctor first.
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
Resistant dextrin
A soluble fibre made from starch. It adds to daily fibre intake; most Australian adults eat less fibre than the recommended 25–30 g a day.
Psyllium husk
A well-established soluble fibre that absorbs water and can help you feel fuller. It needs plenty of fluid and can change how quickly some medicines are absorbed, so space it away from medication.
White kidney bean extract
Researched as a 'starch blocker' that may reduce how much starch is digested. Results are mixed and depend on the dose used.
Caffeine, allergens and what's not disclosed
- Caffeine: not stated. Green coffee and green tea extracts can contain caffeine, on top of the coffee you add it to.
- Allergens: no allergen statement published by the seller.
- Quantities per sachet: not published.
- Sweeteners, flavours and other additives: not listed on the seller's site.
Worth knowing: Pack images we've seen show different net weights on different versions of the box. Check the label on the box you receive for the full ingredient list and warnings.
Ingredient summary table
| Ingredient | What it is | Strength of evidence for weight | Main caution |
|---|---|---|---|
| Green coffee bean extract | Unroasted coffee, rich in chlorogenic acid | Weak, small short trials | May add caffeine |
| Green tea extract | Catechins (EGCG) + caffeine | Small effect at best | Rare liver reactions |
| L-carnitine | Compound involved in fat metabolism | Small, inconsistent | Stomach upset |
| Mulberry leaf | Plant extract | Early-stage (blood sugar) | Diabetes medication |
| Resistant dextrin | Soluble fibre | Supports fullness/fibre intake | Wind, bloating |
| Psyllium husk | Soluble fibre | Good for fibre, fullness | Needs water; spaces medicines |
| White kidney bean | 'Starch blocker' extract | Mixed, dose-dependent | Wind, bloating |
Worth knowing: This summarises public research on each ingredient on its own. It doesn't show what the combined product does, because the blend itself hasn't been tested in published trials that we could find.
Seller claims vs what research says
The seller presents the formula as supporting metabolism, fullness and energy. Those are reasonable descriptions of what the ingredient categories are studied for, but they're claims, not proof the product works for you.
Independent summaries, such as the US National Institutes of Health fact sheet on weight-loss supplements, describe the evidence for green coffee, green tea, carnitine and white kidney bean as limited or inconsistent, with small average effects. Fibre is the most dependable part: it's genuinely useful for feeling full and for gut health.
Read next: Does it work? · Side effects & safety
Is it listed with the TGA?
We couldn't confirm an ARTG listing for Slim Coffee Booster, and the seller describes it as a food supplement rather than a medicine. You can search the TGA's public register yourself. Food-type supplements aren't required to be on the ARTG in the same way as listed medicines.
Frequently asked questions
What are the ingredients in Slim Coffee Booster?
The seller lists green coffee bean extract, green tea extract, L-carnitine, mulberry leaf extract, resistant dextrin, psyllium husk and white kidney bean extract.
Does Slim Coffee Booster contain caffeine?
The seller doesn't publish a caffeine amount. Some ingredients naturally contain caffeine, and you add it to coffee, so treat it as a caffeinated drink.
Is Slim Coffee Booster keto-friendly?
Without a full nutrition panel we can't confirm the carb content. Check the label on the pack if you follow a keto diet.
Is Slim Coffee Booster vegan or gluten-free?
The seller doesn't state this. Check the pack label or contact the seller before buying if this matters to you.
How many sachets are in a box?
20 single-serve sachets per box, according to the seller.
How much caffeine is in Slim Coffee Booster?
The seller doesn't publish it. healthdirect suggests most healthy adults keep caffeine to around 400 mg a day, so count your coffee and any caffeine from the sachet together.
Does Slim Coffee Booster contain sugar or sweetener?
The seller hasn't published a full nutrition panel or additive list. Check the label on your box.
Is green tea extract safe?
Brewed green tea is generally safe. Concentrated extracts have rare links to liver injury, so stop and see a doctor if you notice yellowing skin, dark urine or abdominal pain.
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Sources
- NIH Office of Dietary Supplements: Dietary Supplements for Weight Loss (fact sheet)
- NIH NCCIH: Green Tea, usefulness and safety
- healthdirect Australia: Caffeine
- NIH NCCIH: Using Dietary Supplements Wisely
- TGA: Australian Register of Therapeutic Goods (ARTG) search
- Seller's website: product, pricing and guarantee pages