O! Slim

Updated May 22, 2019.
Published Mar 12, 2018.

We won’t mince words. O! Slim looks really dodgy. This supplement is sold via a one-page website which employs some very questionable advertising and when you click to buy, you are taken directly to PayPal. In our opinion, this supplement has scam written all over it. There’s very little information, unknown ingredients, no money-back guarantee, and is very expensive.


  • There is really nothing good about this supplement


  • No information provided about this supplement
  • Looks like a scam
  • Expensive
O! Slim
O! Slim is a weight loss supplement that promises to help you lose 12kg in just 4 weeks, and according to the advertising has been developed on the “basis of vitamins to breakdown fat”.

Is doing this even possible? We take a look at O! Slim to find out more.

O! Slim Overview

What you need to know about O! Slim

O! Slim looks like a scam. It will not make you use 12kg in just 4 weeks as claimed. This massively overpriced supplement originates from Latvia, but seems targeted specifically at the UK and British customers. It is extremely expensive at £99.00 for a bottle of 60 capsules, yet for this high price you are not even told what the capsules contain or even how to take them. Further concerns also include the lack of any contact details from the company.

What are the side effects of O! Slim?

Judging by the ingredients mentioned in the product information, potential side effects may include; jitteriness, anxiety, insomnia, headaches, increased heart rate/ blood pressure, diarrhoea, changes to blood sugar levels, and allergic reaction.

It is important to bear in mind that this supplement could contain additional undisclosed ingredients. Effects could be unpredictable.

How much does O! Slim cost?

O! Slim is phenomenally expensive and without doubt a total waste of money. It is only on sale via the O! Slim website. Prices are as follows.

  • 1 x bottle of 60 capsules costs £99.00
  • 3 x bottles costs £215.00
  • 6 x bottles costs £320.00

Shipping costs £10.

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O! Slim Key Features

O! Slim is a weight loss supplement that is sold via a one page website and nowhere else. You won’t find it on sale in the shops, or even available from other online outlets. We are not sure how you are meant to actually find it, and with no information about the company or any contact details whatsoever we cannot even say where it has originated from. It seems to have just sprung up overnight.

O! Slim Key Points

  • Each bottle contains 60 capsules
  • Seems to originate from somewhere in Latvia
  • Most if not all of the statements made on the product website are untrue

O! Slim doesn’t come with any real information about what it actually contains. The brightly coloured label just says “O! Slim Improved Formula”. According to the product website it contains; Fenugreek, Calcium, Licorice, Garcinia, and various Fruct (we assume they mean fruit) extracts. However there are no further details such as ingredient quantities, or what these fruit extracts actually are. The product information also claims that it is based on vitamins, which is strange because these are not mentioned either.

How to Take O! Slim

Information not provided.

The website is quite slick looking. The predominant colour is green (green is natural), and there is a picture of a professional looking woman in a white coat who is supposed to be a nutritionist called Jo Lenz.

We found that this picture is a stock photo of a “smiling medical doctor woman.” So called “Jo Lenz” assures customers that this supplement was “designed in collaboration with the World Food Institute”. There is such a thing. The World Food Institute seems to be a German based charity dealing in solutions for world hunger and nutrition. We could find no record of this charity supporting the manufacture of weight loss supplements.

As well as so called “Jo Lenz”, there is an image of a chubby woman consuming hot dogs and a massive plate of food which looks quite fun. This does not seem to make much sense, but presumably is there to show you what happens if your metabolism gets out of control.

O! Slim Concerns:

  • What is actually contained in this supplement? There is no proper ingredients list
  • High risk of side effects. Who knows where this supplement was made or even what it contains

Overall, O! Slim looks to be a very dodgy looking supplement. There is no real ingredients information, no proper product label, and despite the claims and labels posted all over the website that say things like “this product is certified” and bizarrely “approved by sanitary inspection” there really is no evidence that any of this is true.

The company behind O! Slim is called the O Company and this is based in Latvia, although the provided address is only a P.O Box.

O Company
P.O. Box No 12
Brivibas str. 428,
Latvia, LV-1024,

O! Slim does not seem to be currently available in European countries. It is only available in the UK with prices provided only in British Pounds rather than Euros.

What does O! Slim claim to do?

According to the advertising this supplement is a “Scientists Innovative Discovery”

It offers:

  • Safe Slimming
  • Lose 12kg in 4 weeks

And has been “developed on the basis of vitamins which promote the BREAKDOWN of fat”

We would have liked to have found out more about these vitamins!

O! Slim™ is a dietary supplement that has been specifically designed to boost your metabolism and curb appetite. O!Slim™ consists exclusively of natural ingredients that increase your energy level.

Later on in the product information, other ingredients are mentioned in passing.

The combination of taurine, caffeine and guarana extract can be with all confidence considered a true gift for all who’s slimming, since this complex breaks down fat deposits in problem areas in a matter of days

These are not the ingredients which are advertised.

There is zero evidence that any of these claims are true. This supplement will not make you lose 12kg in just 4 weeks.

Does O! Slim work?

We don’t advise that you try it to find out. There is no real information about the ingredients, so you cannot really know how this supplement will affect you.

There are before and after pictures of so called successful slimmers on the website, but these are certainly not genuine.

The bottom line is that O! Slim is unlikely to work and in addition it may cause side effects.

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O! Slim Ingredients

There is no clear ingredients information.

The product advertising mentions; Fenugreek, Calcium, Licorice, Garcinia, and various Fruit extracts, but without knowing the ingredient quantities it is hard to see how effective these will be. Fenugreek is an Indian culinary spice which may help lower blood sugar levels. Licorice is known as a laxative that may cause side effects. We assume the Garcinia relates to Garcinia Cambogia, which is supposed to help weight loss but comes with very little real evidence, and of course fruit extracts can be beneficial for health, in much the same way as eating fruit is good for you.

The additional ingredients mentioned later in the text but not actually advertised are Taurine, Caffeine, and Guarana. These will have a stimulant effect – Guarana is a natural bean extract that contains higher levels of caffeine than the coffee bean, and of course we are all familiar with caffeine in coffee and sodas. It can have a metabolism boosting effect which can help weight loss, but this often decreases as you become accustomed to use.

Taurine is an amino acid, and an ingredient in Red Bull energy drink. It was believed to enhance energy levels, but this has since been disproven.

O! Slim Side Effects

It is impossible to say how this supplement will really affect you, and even if it contains the named ingredients or additional ingredients that have not been mentioned.

However judging by the named ingredients and assuming they are in high quantities, potential side effects may include;

  • Jitteriness
  • Anxiety
  • Insomnia
  • Headaches
  • Increased heart rate and / or blood pressure
  • Diarrhoea
  • Changes to blood sugar levels
  • Allergic reaction


Not suitable for individuals under 18. Avoid if you are pregnant or breast feeding. Speak to your doctor before using if you have any underlying medical conditions or are taking prescription medication.

O! Slim Customer Feedback

There are no customer reviews for O! Slim.

O! Slim Money-Back Guarantee

There is no money-back guarantee for O! Slim.

Where To Buy O! Slim

O! Slim is only available from the product website. It is only on sale to customers within the UK.

Watchdog Verdict

O! Slim is a shockingly bad supplement. It is aimed at the UK market by what looks like Latvian scammers hiding behind a PO address, and there is simply no way you should ever buy this supplement. The advertising makes some tempting claims but O! Slim is not going to make you lose 12kg in just 4 weeks. The ingredients list is unknown; the product website full of lies and untruths, and finally the price is just ridiculous. £99.00 for 60 unknown capsules is insane and a huge risk.

It is an easy decision. O! Slim looks like one of the worst cases of scamming we have seen in a while, so you should certainly stay away from this useless product. Therefore, we do not recommend O! Slim to our readers.

How does O! Slim compare to Phentatrim?

CriteriaO! Slim ComparisonPhentatrim 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.

Have Your Say

3 comments on 'O! Slim'

  1. I did not order from these people. They sent a bottle and are now billing me and threatening to turn over to collection agency.

  2. these people with o slim are crazy i didnt order no product but got some any way some how now want to turn me over to collection for not paying crooks be care full

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