# Diet coffee sticks that mix in cold water: Heorissok Dark Americano

- By Saeun (https://superchart.com/en/@glass-jar-routine/)
- Written Sep 15, 2026
- Products › Food & snacks
- Product provided: I received this product from the brand and wrote this after using it myself.
- English edition: https://superchart.com/en/@glass-jar-routine/heosissook-dark-americano-diet-coffee/
- Also in: [한국어](https://superchart.com/ko/@glass-jar-routine/heosissook-dark-americano-diet-coffee/index.md)

## In short

Health House Heorissok Dark Americano is a Korean diet coffee sold as 30 sticks of 3,000mg per box, each containing garcinia cambogia extract. Stirred straight into 300ml of cold water, one Heorissok stick dissolved with almost no clumping or sludge at the bottom of the cup, and despite the "dark" name the flavour was mild rather than sharply bitter. An easy pick for anyone who drinks americanos daily and wants to watch body fat at the same time.

## Good to know

- **Product**: Health House Heorissok Diet Dark Americano flavour
- **Contents**: 30 sticks of 3,000mg each (1 stick a day, about one month's supply)
- **Functional ingredient**: Garcinia cambogia extract, 750mg total HCA per stick
- **Nutrition**: Per stick: 10kcal, 2g carbohydrate, 0g protein, 0g fat, 0mg sodium
- **How to take**: Once a day, mix 1 stick into 250–300ml of water
- **Caution**: Children, pregnant women and breastfeeding mothers should avoid it

*Prices as written by the tester on Sep 15, 2026 · not updated automatically*

Friends, once you start a diet, don't you end up watching not just snacks and meals but even the drinks you have every day?

![Styled photo of Heorissok Dark Americano diet coffee product](https://img.superchart.com/images/heosissook-dark-americano-diet-coffee/heosissook-dark-americano-diet-coffee-01-yoq3t-966.webp)

I'm someone who drinks americanos often, so while looking for something I could sip just as easily as coffee while also managing body fat, I came across Heorissok Dark Americano diet coffee.

The packaging claimed it dissolves well even in cold water, which caught my eye. When I actually mixed it up, it turned out far smoother and milder than I expected, easy to drink without any hassle. Today I'll walk through the box contents, the taste and solubility, and how to prepare it.

## What's inside one box of Heorissok Diet Dark Americano?

Heorissok Dark Americano comes with 30 sticks of 3,000mg each in one box. Since you take one stick a day, a single box lasts about a month.

![Box of Heorissok Dark Americano with 30 sticks](https://img.superchart.com/images/heosissook-dark-americano-diet-coffee/heosissook-dark-americano-diet-coffee-02-1i8ez-1200.webp)

> A diet coffee you can manage with one cup a day

![Individually packaged diet coffee sticks](https://img.superchart.com/images/heosissook-dark-americano-diet-coffee/heosissook-dark-americano-diet-coffee-03-pmey4-966.webp)

Each stick comes individually packaged, which made storage and carrying easy. Whether at home, on the way to work, out running errands, or traveling, tossing a couple of sticks in a bag felt effortless.

No measuring needed — just water and a cup — which made it a diet coffee that's easy to keep up with every day.

## Garcinia cambogia extract with 750mg HCA and just 10kcal per stick

Heorissok Dark Americano contains garcinia cambogia extract as its functional ingredient. One stick, the daily serving, contains a total of 750mg HCA.

Garcinia cambogia extract is said to be a functional ingredient that helps reduce body fat by suppressing the conversion of carbohydrates into fat.

![Product label showing HCA content and nutrition facts](https://img.superchart.com/images/heosissook-dark-americano-diet-coffee/heosissook-dark-americano-diet-coffee-04-1qemn-966.webp)

Each stick is listed at 10kcal, with 2g carbohydrates, 0g protein, 0g fat, and 0mg sodium. I liked that a single daily cup lets you easily cover your day's intake.

![Health functional food label with intake method and precautions](https://img.superchart.com/images/heosissook-dark-americano-diet-coffee/heosissook-dark-americano-diet-coffee-05-84h8c-953.webp)

That said, health functional foods aren't a substitute for a balanced diet and regular exercise. It's best used as a supplement while you keep managing your diet and activity level.

## Does Heorissok Dark Americano really dissolve in cold water?

With Heorissok Dark Americano, I dropped one stick straight into cold water and it dissolved quickly with just a few stirs. The packaging claimed it dissolves very well even in cold water, so I was curious whether that was really true and tried it myself.

Usually with powdered coffee, don't you find that adding it to cold water leaves powder floating on the surface or clumps forming, needing a long stir? With this product, though, there was almost no residue left at the bottom of the cup or powder floating on top.

Since you don't need to prepare hot water separately, it's convenient for busy mornings or hot days when you want something like an iced americano. If you're looking for a diet coffee that dissolves well in cold water, this part should be quite satisfying.

## How bitter does the dark americano flavour actually taste?

With a name like Dark Americano, I expected something quite strong and bitter at first. But after actually drinking it, there was no burnt taste or harsh bitterness — overall it was smooth and mild.

![A cup of Dark Americano mixed with water](https://img.superchart.com/images/heosissook-dark-americano-diet-coffee/heosissook-dark-americano-diet-coffee-06-a6me1-650.webp)

It's not sweet like a mix coffee, but it also wasn't as bitter and heavy as a regular black coffee. The coffee aroma came through gently and the aftertaste was relatively clean, which suited my preference for a light americano.

![Diet coffee americano in a cup](https://img.superchart.com/images/heosissook-dark-americano-diet-coffee/heosissook-dark-americano-diet-coffee-07-u3x1q-650.webp)

I barely noticed any of the odd smell or off-putting taste you sometimes get with diet products. No matter how good the ingredients are, a product you need to take daily won't get reached for if it doesn't taste good — but this one felt like drinking a regular coffee, easy to enjoy.

## How to drink it: one stick in 250–300ml of water a day

Preparation is very simple. Once a day, mix one stick into water. The package instructs adding 250–300ml of water depending on preference.

![Mixing one stick into 300ml of water](https://img.superchart.com/images/heosissook-dark-americano-diet-coffee/heosissook-dark-americano-diet-coffee-08-11dd8-966.webp)

I used about 300ml of water and got a light, mild americano flavor that was easy to enjoy. If you prefer a stronger coffee taste, cutting the water down to around 250ml works well.

![Finished coffee next to a Heorissok diet stick](https://img.superchart.com/images/heosissook-dark-americano-diet-coffee/heosissook-dark-americano-diet-coffee-09-1fw47-966.webp)

It dissolves well in cold water, but depending on your preference, you can also mix it with warm water for a hot americano feel. In summer, add ice to cool it down; on chilly days, enjoy it warm — it's flexible either way.

### Who should avoid Heorissok diet coffee?

- Children, pregnant women, and breastfeeding women should avoid taking this.
- If you have liver, kidney, or heart conditions, allergies, or asthma, or are taking medication, consult a professional before use.
- If you experience any adverse reaction, stop taking it and consult a professional.

## Heorissok Dark Americano: the verdict

Heorissok Dark Americano is easy to carry thanks to its individual stick packaging, and it's simple since you just mix one stick with water a day.

![Closing shot of Heorissok diet sticks and a coffee cup](https://img.superchart.com/images/heosissook-dark-americano-diet-coffee/heosissook-dark-americano-diet-coffee-10-i455n-966.webp)

What I liked most was how quickly the powder dissolved in cold water, leaving almost no clumps. Despite the name Dark Americano, the taste wasn't overly bitter or heavy — it was mild, making it easy to drink daily without much burden.

If you're someone who enjoys americanos regularly and wants to manage your diet and body fat at the same time, or if you're looking for a diet coffee you can mix straight into cold water, Heorissok Dark Americano is worth a look.

Of course, it's important not to rely on just this one cup but to keep up a balanced diet and regular exercise alongside it. If you want to build an easier management habit using the coffee you already drink, this could be a solid option.

## Products

- Heorissok Dark Americano Diet Coffee 3,000mg x 30 sticks — Heorissok

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