SlimJOY WaterOut XXL

Updated May 23, 2019.
Published Nov 9, 2018.

SlimJOY is a European company based in Slovenia. SlimJOY products are on sale all across Europe, including Britain and Ireland via country-specific websites. This particular product is a diuretic for decreasing water retention to help you slim down. While it can indeed help flushing out excess water, it has to be mentioned that this is not a permanent solution to weight loss. There are only ten sachets in a box, but we feel that this is a good thing, as long-term use of this product could well lead to dehydration, so any more would be somewhat dangerous.


  • Some positive customer feedback


  • High proportion of negative comments about delivery
  • Will not help permanent weight loss
  • May cause side effects
SlimJOY WaterOut XXL
Say No to bloating! WaterOut XXL from SlimJOY is a diuretic drink that the advertising claims will make you healthier and slimmer, as well as perk up your liver and remove cellulite.

But, is any of this true? We find out.

SlimJOY WaterOut XXL Overview

What you need to know about SlimJOY WaterOut XXL

SlimJOY WaterOut XXL is a powdered supplement that is packaged in sachets which you use to make a drink. It contains a blend of many different plant extracts all of which cause increased urination, so if this is what you are looking for, it will probably work. Increasing your urine output can help improve water retention and in turn, this may help you look and feel temporarily thinner but can lead to unpleasant side effects such as dehydration. If you do suffer from water retention asking advice from your doctor is the best policy rather than turning to OTC supplements like this.

What are the side effects of SlimJOY WaterOut XXL?

SlimJOY WaterOut XXL may cause you to become dehydrated. Symptoms of dehydration include thirst, dry mouth, fatigue, dizziness, heart palpitations, confusion, fainting, inability to sweat or urinate, weight loss, fever, constipation, and loss of vital mineral (electrolytes).

Some of the herbal extracts used in this supplement have added concerns and potential side effects include bloating, headaches, diarrhoea, nausea, abdominal pain, gas, itchiness, and allergic reaction.

Java Tea is known to cause interactions with some mental health medication so you need to check with your doctor before use if you are taking prescription medication or have an underlying medical condition.

How much does SlimJOY WaterOut XXL cost?

SlimJOY WaterOut XXL is quite expensive, 1 x box of 10 sachets costs £17.90. Shipping cost £3.00 to UK addresses.

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SlimJOY WaterOut XXL Key Features

SlimJOY WaterOut XXL is a powdered supplement packaged in individual sachets that you just to a glass of water and drink.

SlimJOY WaterOut XXL Key Points

  • Each pack contains 10 sachets
  • Shipping costs £3.00 to UK addresses
  • Sensilab is based in Slovenia

It contains some well-known diuretic ingredients, and the idea is that the supplement will increase urination so you can remove water retention. Ingredients include Prickly pear powder and SensiDrain, a proprietary blend containing herbal extracts such as dandelion, milk thistle, and sarsaparilla. Because this is a proprietary blend, individual ingredients information is not available but the combination adds up to 2000mg in total. Check out the ingredients tab to find out more.

Increasing urination to remove bloating and water weight is a common weight loss supplement function that usually falls under the detox description. It is not very good for health and can lead to dehydration, but many people do it in the misguided belief it will help weight loss. It can have a temporary effect on making you a few lbs lighter and it can look as if your stomach is flatter, but once you rehydrate, you will be back to where you started.

If you do suffer from water retention your best action is to see your doctor and take trained medical advice.

How to Take SlimJOY WaterOut XXL

  • The recommended daily intake is 1 sachet dissolved in 1 litre of water and drunk throughout the morning

We have covered many SlimJOY supplements in previous reviews. These include SlimJOY Bootburn Intensive,
a fat blocker called SlimJOY Capsules, and night time fat burner, SlimJOY Nightburn.

SlimJOY WaterOut XXL Concerns:

  • May cause side effects
  • There seem to be issues with delivery times
  • Although this supplement is marketed as a health product it is not good for health

SlimJOY is a brand from Sensilab, a weight loss supplements company based in Slovenia. The address is provided as Sensilab d.o.o, Verovškova 55a, 1000 Ljubljana, and you can contact the company by email at [email protected]

The company operate across Europe with sales pages, Facebook pages, and product information provided in most European languages, including French, German, Polish, and Romanian. SlimJOY also advertises in the UK and the Republic of Ireland. However, you can only buy from your country specific website. Customers using the UK SlimJOY website cannot have products shipped to addresses outside the UK.

What does SlimJOY WaterOut XXL claim to do?

As with all SlimJOY product information, the advertising for WaterOut XXL seems reassuringly scientific and technical combined with some punchy claims about the fantastic benefits you can expect from this supplement.

According to the product information, WaterOut XXL is,

“An extremely powerful ALL-NATURAL diuretic drink with visible slimming effects.”

The key features:

  • Flush out excess water and cleanse your body of harmful toxins
  • Boost your metabolism and lose stubborn stomach fat
  • Improve your microcirculation and get rid of cellulite
  • Detox your liver and maximise its incredible fat-burning powers
  • Clinically proven effects!

The company guarantees:

  • Decrease in water retention
  • Visible slimming effects
  • Reduced swelling of calves and ankles
  • Reduction of swollen legs sensation

The supplement is fast working, according to the advertising,

With just a single drink a day, you will finally be able to:

  • Lose your first pounds within days
  • Substantially accelerate water and toxin elimination
  • Quickly and drastically reduce swelling, bloating and puffiness
  • Reduce cellulite
  • Boost your metabolism and liver (your body’s main fat-burning organ)
  • Keep the necessary minerals despite losing excess water

Does SlimJOY WaterOut XXL work?

SlimJOY WaterOut XXL will undoubtedly work in that it will cause you to urinate more. However, with so many ingredients contained in the formula which all have this function, we have concerns that it will be far too strong.

CactiNea, the branded prickly pear supplement has undergone clinical testing which found that it did help remedy water retention in some users and without adversely affecting mineral balance. However, with the addition of all these other diuretics, it seems extremely likely that using this supplement will lead to dehydration and electrolyte imbalance.

The advertising claims that this supplement will have weight loss and health benefits but although some of the ingredients may help reduce cholesterol and milk thistle is believed to help liver function, this cocktail of diuretics is more likely to lead to health problems than benefits.

There is zero evidence that taking a lot of diuretics in combination like this will lead to fat loss.

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SlimJOY WaterOut XXL Ingredients

Serving size is equal to one sachet.

  • Prickly pear fruit powder (2000mg): According to the links to the clinical evidence, this is in the form of a branded supplement called CactiNea which is made by a company called Nexira. CactiNea has undergone some clinical testing both on rats and overweight women. Prickly Pear (Opuntia ficus indica) may have health benefits. It is high in antioxidants, and some research suggests that it may help reduce cholesterol levels and blood sugar levels. CactiNea was tested on 15 women who took 2000mg over a course of a week and was found to be effective as a way to improve diuresis (water retention) by 27% without adversely affecting mineral balance or blood pressure. Source

SensiDrain™ (2000mg): This is Sensilab’s own patented formula. It contains;

  • Sarsaparilla root extract: Sarsaparilla is derived from a subtropical plant that grows in Mexico and the Canary Islands where it is used as a folk medicine and known as a diuretic. Testing on mice confirmed that it is diuretic so this will probably be the main effect here. Well known as a flavouring in American soft drinks. Source
  • Java tea leaf extract: Java tea is not ordinary tea. Instead, it is derived from a herb called Orthosiphon stamineus. It may have therapeutic benefits but its main function here is that it is a diuretic. Source
  • Parsley leaf extract: As well as being a popular garden herb that goes well with fish dishes, parsley is sometimes taken for urinary infections and digestive issues. It is a diuretic.
  • Artichoke leaf extract with 2-5% cynarin: Artichoke contains natural chemicals including cynarin which is often used as a natural sweetener. Artichoke extract is sometimes taken to improve digestive issues such as heartburn because it may stimulate bile production from the liver and it may help reduce cholesterol. It also increases the flow of urine.
  • Milk thistle dried fruit extract: Natural plant extract that is believed to be effective for liver damage such as poisoning and alcohol abuse. Although it may be a useful plant extract, it can cause side effects including diarrhoea. It requires further clinical investigation.
  • Dandelion root extract: Powerful herb that is a familiar garden weed. It may have medical applications but is best known as a diuretic.
  • Other active ingredients blend (125 mg): This is composed of raspberry fruit juice concentrate powder, natural raspberry flavour, acidity regulator: citric acid, red vine leaf extract with 30% total polyphenols. In our opinion, this looks like a healthy natural flavouring with added antioxidants.

SlimJOY WaterOut XXL Side Effects

Side effects are extremely likely. The most common one of these is likely to be dehydration. Symptoms of dehydration include:

  • Thirst
  • Dry mouth
  • Fatigue
  • Dizziness
  • Heart palpitations – such as sensation of pounding heart or rapid beat
  • Confusion
  • Fainting
  • Inability to sweat or urinate
  • Weight loss
  • Fever
  • Constipation
  • Loss of vital minerals

Some of the herbal extracts used in this supplement have added concerns and potential side effects include:

  • Bloating
  • Headaches
  • Diarrhoea
  • Nausea
  • Abdominal pain
  • Gas
  • Itchiness
  • Allergic reaction


Not suitable for individuals under 18. Avoid if you are pregnant or breast feeding. Speak to your doctor before use if you have an underlying medical condition or are taking prescription medication. Java tea is known to interact with some mental health medication for example and the other ingredients may come with similar concerns. Cease use in the case of an allergic reaction such as hives or swelling and seek medical advice if necessary.

SlimJOY WaterOut XXL Customer Feedback

We found some reviews for SlimJOY WaterOut XXL hosted on Trust Pilot. The overall opinion of SlimJOY and this product is poor, although there are positive comments and nobody has complained about side effects.

This customer tried WaterOut XXL and was disappointed,

Bought the 2 water out XXL boxes. They claim results start after 10 days. 2 boxes=20 days…the only effect was slight increase in waist size. Can’t find anywhere to claim the promised “money back guarantee” Pure con!

Another customer found it did not work but said it tasted nice,

Waste of money, did not lose a lb. Just nice flavoured water

However there are some positive reviewers such as this lady,

Great value and service. Love the water out product. Great company to deal with. Brilliant xx

Some customers have complained about slow delivery times although this reviewer does like the supplement,

Ordered three times and the three orders were massively late in arriving. Water out XL works but the communication and empathy shown was poor.

SlimJOY has responded politely to all comments and have invited dissatisfied customers to contact the company directly.

SlimJOY WaterOut XXL Money-Back Guarantee

There is a money-back guarantee offered but it is confusing and we think tricksy.

The terms and conditions state that:

The Buyer is obligated to use the products as per the instructions provided and strictly follow the course before claiming dissatisfaction with the said products. Further, Sensilab shall accept products/packaging and the pertaining order bill from the Buyer, if the Buyer is not happy with the product for any reason whatsoever.

Sensilab’s satisfaction guarantee is valid for 30 days from receiving the product.

So this seems to suggest that you need to use the supplement for as directed before you can claim a refund. But by then your 30 days guarantee period will have expired.

In our opinion, you will struggle to get your money back if you are dissatisfied. To contact the company by email the address is [email protected]

You could also try leaving a review on Trust Pilot as the company does seem to respond to comments.

Where To Buy SlimJOY WaterOut XXL

You can buy SlimJOY WaterOut XXL via the official SlimJOY website. The site is only for UK users.

SlimJOY also advertise across Europe but you will need to access the relevant site for your country in order to buy.

Watchdog Verdict

SlimJOY WaterOut XXL will probably work for most users in that it will increase urination and some customers who suffer from water retention have been satisfied by using this supplement. However, it is important to point out that this supplement will not lead to permanent fat loss, remove cellulite, improve liver function, or live up to any other of the advertising claims.

In our opinion, this supplement is potentially dangerous and may lead to dehydration. We like that it is only available in boxes of 10 sachets because using this supplement on a regular basis could be dangerous. And for occasional use, you may feel it is a reasonable way to remove excess water weight. But this is not healthy or beneficial and it will not lead to permanent weight loss. We also think it is unlikely you will get your money back if you are dissatisfied despite the advertised guarantee.

The bottom line is that we don’t believe that this supplement is safe or effective for weight loss. We would not take it ourselves so we do not recommend SlimJOY WaterOut XXL to the Watchdog readers.

How does SlimJOY WaterOut XXL compare to Phentaslim?

Criteria SlimJOY WaterOut XXL Comparison Phentaslim comparison
Clinically Proven Ingredients
Side Effect Free
Positive Customer Reviews
24/7 Support
Money-back Guarantee

Disclaimer: Our reviews and investigations are based on extensive research from the information publicly available to us and consumers at the time of first publishing the post. Information is based on our personal opinion and whilst we endeavour to ensure information is up-to-date, manufacturers do from time to time change their products and future research may disagree with our findings. If you feel any of the information is inaccurate, please contact us and we will review the information provided.

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