Updated May 22, 2019.
Published Apr 8, 2018.

Fenatrim, sold by VitaMart 123, is a dangerous looking supplement. It is extremely low quality and only contains stimulants, so it will cause a range of side effects in most users. There is no realistic looking customer feedback and despite the claims that this company will give you your money back under a guarantee, we think it is highly unlikely they will honour this agreement. Fenatrim has probably been manufactured overseas, possibly in China, so you really are gambling with your health if you use this supplement.


  • Side effects may cause you to lose weight short term


  • Contains unknown quantities of potentially very dangerous ingredients
  • No information regarding safety standards of manufacture
  • No background information or product website
  • Side effects could be serious for some users
Fenatrim is a diet pill currently sold on Amazon where it has picked up several customer reviews. However, there is not much background to this supplement or the company behind it, and this combined with a stimulant-rich ingredients profile makes us already suspicious about the safety of this supplement.

But are we being unfair? We take a look at Fenatrim to find out more.

Fenatrim Overview

What you need to know about Fenatrim

Fenatrim is a very bad looking weight loss supplement only on sale via Amazon USA, and there is very little information about it. We managed to find an ingredients list and discovered this supplement is crammed full of stimulant ingredients in unknown quantities, but whether these are in high quantities or in insignificant amounts is anybody’s guess. Side effects could be a serious issue for some users. Fenatrim seems to be a replacement for another product called ApiFast which used to be sold on Amazon by VitaMart 123, the same company, and was equally underwhelming.

What are the side effects of Fenatrim?

Potential side effects may include headaches, jitteriness, anxiety, irritability, sleep disturbances, increased heart rate, palpitations, increase in blood pressure, dizziness, mood swings, stomach upset, nausea, and vomiting, cardiac arrest, increased risk of stroke, allergic reaction, breathing difficulties, skin rash, seizure, liver failure, and death.

Synephrine is banned by many US sporting authorities, so using this supplement will get you disqualified from competitive sport.

Hordenine is known to create a false positive reading for opioids in drug testing.

How much does Fenatrim cost?

Fenatrim is not expensive. 1 x bottle of 60 tablets (30 days supply) costs $28.97 and includes free shipping.

WATCHDOG TIP: Consider using the Editor's #1 rated appetite suppressant – CLICK HERE

Fenatrim Key Features

Fenatrim is a weight loss supplement, that according to the product information works as an appetite suppressant and fat burner. These two functions are obviously effective for weight loss, but there are many ways to achieve these two effects and the most cost-effective method for manufacturers is simply to load up a supplement with various types of stimulants.

Doing this works in several ways for weight loss. It does increase energy levels by making you rush around more burning off calories. It also can affect stress hormones in your body by putting you into the physical state known as the flight or fight response, which is your natural reaction to frightening situations where you have to act fast.

As everybody knows from personal experience, this natural response causes a number of physical reactions including increased heart rate, sweating, and loss of appetite. When you take some types of stimulants, the physical effects can be the same and the idea is that this will lead to weight loss.

Fenatrim Key Points

  • Contains 60 tablets per bottle
  • On sale from VitaMart 123 exclusively via Amazon
  • Contains a stimulant blend of ingredients in unknown quantities
  • Identical to an earlier VitaMart 123 supplement called ApiFast

The Fenatrim advertising does not stretch to including an ingredients list. However, we have managed to find out the names of the ingredients included in this supplement. These are caffeine, synephrine, Hordenine, Yohimbine, and Phenylethylamine HCL.

Apart from the caffeine, many of the other ingredients are closely linked in molecular structure to amphetamines and may cause many of the same side effects, although if you are looking for a semi-legal form of speed, this will probably be disappointing. There are no details about how much of any of these ingredients are contained in this supplement, but if you have any health issues surrounding heart and blood pressure you should certainly avoid it.

Take a look at the ingredients tab and the side effects section to find out more.

How to Take Fenatrim

Take one tablet 20 minutes before each meal for a total of two pills per day.

Fenatrim is one of those supplements that seems to have sprung up from nowhere. These days where just about everyone has their own blog or website, or at least a Facebook page or instagram account, whereas Fenatrim has absolutely nothing. The label is marked “All Natural”, but this could a company name and not actually a description.

However, we did some digging and found that the company selling Fenatrim is a shadowy company called VitaMart 123, and that this incognito company is based somewhere in New York. Interestingly, VitaMart 123 has past form in selling an identical weight loss supplement called ApiFast, which is no longer available on Amazon. It seems a safe bet to assume that Fenatrim and ApiFast are the same supplement.

Fenatrim Concerns:

  • The effects could be dangerous and unpredictable
  • Will VitaMart 123 really honour the guarantee as claimed? We think this is highly unlikely
  • Customer feedback comments do not seem genuine

What does Fenatrim claim to do?

The product information states that Fenatrim,

“Helps to burn fat while preserving muscle. Helps decrease appetite so you can eat less calories every day.”

According to the advertising, there are five key features to Fenatrim:

  • Fat Burning Catalysts
  • Appetite Suppression / Reduce Calorie Intake
  • Increased Energy / Focus
  • Increased Fat Burning Metabolism
  • Safest Advanced Weight loss / Money Back Guarantee

We certainly would not believe these claims, especially the point about safe weight loss and a money-back guarantee because this is just not going to happen.

It is important to bear in mind too that there is no mention of where this supplement was manufactured. Without a Made in the USA label and the lack of product information, we would put money on Fenatrim being manufactured somewhere inexpensive overseas such as China. Bad news for customers because this means that it is unlikely to conform to basic hygiene and safety regulations, and will not conform to GMP (good manufacturing practice).

Does Fenatrim work?

Fenatrim looks to be loaded with stimulants, although the important information about how much of anything is contained in this supplement is not disclosed, so effects will be unpredictable.

You may find that you could take this supplement and notice a reduction in appetite, and if the side effects are not too severe, you may feel that this supplement is effective in helping you lose a couple of pounds short term.

However, we do not advise you to try. The listed ingredients are known for causing side effects and even death in some cases.

Stimulants such as synephrine, Hordenine, Yohimbine, and Phenylethylamine, all present in this supplement, affect the central nervous system and cause the body to go into the flight or fight response. These chemicals are known as Sympathomimetic agents (also known as adrenergic drugs or adrenergic amines) and according to medical research,

Sympathomimetic agents have a poor history of long-term success in the treatment of obesity.

In addition, there are health risks.

According to reports,

strokes and cardiac arrhythmias have been the major concern about supplements containing the Sympathomimetic drug, synephrine.

phentatrim bottle
The most popular appetite suppressant in 2021 is Phentatrim.

Its ingredients are scientifically proven to aid weight loss and you are covered by a full 60-day money-back guarantee from a trusted company, making Phentatrim a very popular choice in the diet world.

Phentatrim is the best thing to hit the supplement market in a long time, with thousands of customers already seeing the benefits. That’s why it's our editor's top pick.

Read the Watchdog Phentatrim review here.

Fenatrim Ingredients

Serving size is equal to one tablet.

  • Phenylethylamine HCI: Also often known as PEA, Phenylethylamine is derived from the amino acid phenylalanine. It is a stimulatory transmitter, that improves the mood of the user and increases alertness and many people report a short lived buzz after taking it. However, there is no real evidence that it supports weight loss. It is dangerous in high quantities. Source
  • Caffeine: The World’s favourite stimulant, and it can be useful in diet pills because it can increase the speed of the metabolism thus helping you burn off fat more easily. However, the weight loss effect is generally short lived as you quickly build up a tolerance. Caffeine is safe in moderate quantities but health advice is to consume no more caffeine that 400mg a day, roughly the equivalent of four cups of coffee. How much is contained in this supplement? We just don’t know.
  • Hordenine: Molecule present in some natural foods such as barley and bitter orange, and an adrenergic amine which means it affects the central nervous system. It is a stimulant so this will be the effect. May cause false positive readings on opiods drug testing. Source
  • Yohimbine: This natural chemical derived from a tree variety in Africa is legal, but it is unsafe. It can increase blood flow to the sexual organs, making it often used in OTC sex drugs. Yohimbine is a stimulant that will increase heart rate and blood pressure, and has been linked to causing strokes and seizures. Source
  • Synephrine: Andregenic drug which means it mimics the stress response of the nervous system. It is often present in diet pills as a legal alternative to ephedrine, which like synephrine has a similar molecular structure to amphetamines. It contains chemicals that cause the heart to beat faster and blood pressure to rise by squeezing blood vessels. Synephrine is banned by many sporting authorities as an illegal stimulant.

Other ingredients:

  • Dicalcium Phosphate, Microcrystalline Cellulose, Sucrose and FD&C Blue #1, and Magnesium Stearate

Fenatrim Side Effects

The ingredients list for Fenatrim reads like a list of what NOT to take if you wish to remain side-effect free! All the components are known for side effects, and of course, without knowing the strength of each one, it is impossible to evaluate the real risk to consumers.

Potential side effects may include:

  • Headaches
  • Jitteriness
  • Anxiety
  • Irritability
  • Sleep disturbances
  • Increased heart rate
  • Palpitations
  • Increase in blood pressure
  • Dizziness
  • Mood swings
  • Stomach upset
  • Nausea and vomiting
  • Cardiac arrest
  • Increased risk of stroke
  • Allergic reaction
  • Breathing difficulties
  • Skin rash
  • Seizure
  • Liver failure
  • Death


Not suitable for individuals under 18. Avoid if you are pregnant or breast feeding. Do not take if you have an underlying medical condition or are taking prescription medication. Speak to your doctor if you experience side effects. Remember to take the bottle of Fenatrim with you if you have to go to hospital as a result of taking this.

Fenatrim Customer Feedback

There are customer reviews on Amazon USA (the only retail outlet), but we have doubts about the authenticity of the reviews.

Positive comments mainly relate to the fact that this supplement does NOT cause side effects. These include,

Works great lots of energy with no jitters

No jitters and I can definitely tell it is suppressing my appetite!

This so-called customer-rated Fenatrim higher than prescription diet pill Phentermine,

Fenatrim is great. I have taken Phentermine 37.5. Both medications are the same. The only different is Fenatrim is much cheaper. Thanks so much Amazon. Will continued to keep reordering from Amazon.

Even the couple of negative reviews say that this supplement does not cause side effects, such as this customer,

Day 2 and not what I expected. Still hungry. Won’t purchase again

We must ask whether anyone actually tried this supplement?

Even caffeine can be too much for some users but suspiciously, not one person has ever had an adverse reaction to caffeine let alone the other ingredients.

Symptomatic agents cannot fail to cause side effects such as jitteriness and increased heart rate. This is after all how they work!

Fenatrim Money-Back Guarantee

According to the advertising, there is a money-back guarantee but we cannot see VitaMart 123 keeping to this agreement. However, you could probably get your money back by bribing the company with good feedback. This probably is what is going on here with some of the feedback, and VitaMart 123 do have past form in manipulating feedback and fielding requests for refunds with free bottles of their earlier product ApiFast.

Where To Buy Fenatrim

Fenatrim is only on sale via Amazon USA where it is sold by VitaMart 123.

Watchdog Verdict

Fenatrim is a dreadful looking supplement. It is extremely low quality and only contains stimulants, so it will cause a range of side effects in most users. Make no mistake, the ingredients profile is dangerous and our reported side effects are all known to be caused by the ingredients contained in this supplement.

In addition, there is no realistic looking customer feedback and despite the claims that this company will give you your money back under a guarantee, we think it is highly unlikely they will honour this agreement.

In our opinion, Fenatrim has probably been manufactured overseas, possibly in China, so you really are gambling with your health if you use this supplement.

You should never buy supplements without knowing exactly what you are taking. It is a massive health risk, and just because a product is openly on sale does not mean it is safe. We do not recommend Fenatrim to the Watchdog readers but if you decide to take it anyway, don’t say we didn’t warn you!

How does Fenatrim compare to Phentatrim?

CriteriaFenatrim 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.

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