Phentaslim Review (UPDATED 2020): Don't Buy Before You Read This!

Expert rating: stars-icon     By Richard (Senior Reviewer) July 7, 2020       Advertising Disclosure

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What is it? 

Phentaslim is a weight loss pill made with stimulants that promise quick and safe weight loss. It’s said to be backed by thousands of testimonials, and with a current 91,367 customers using this brand.

The company claims it’s 100% natural with no possibility for side effects. Diet and exercise are still advised for results. They also recommend not taking this beyond 5pm, as it may cause sleep issues. The ingredients are a combination of stimulants, amino acids, and minerals. Is this a safe stimulant formula? What have other people experienced? In this review, you’ll learn the truth about Phentaslims possibilities.

Phentaslim Ingredients and Side Effects 
Green Tea Caffeine L-Theanine L-Carnitine L-Tyrosine
Panax Ginseng Guarana Seed Magnesium Cayenne Pepper Nicotonic Acid
Zinc Acetate Black Pepper Extract Pyridoxine HCL Riboflavin Thiamin
Cyanocobalamin Gelatin Magnesium Stearate

Green Tea: Common tea added due to its natural caffeine, and antioxidant content.

The National Center for Complementary and Integrative Health mentions that there’s:

“not enough reliable data to determine whether green tea can aid in weight loss” 

There’s also concern over its ability to cause damage:

“There have been some case repots of liver problems in people taking green tea extracts” 

This ingredient also is only known to have an effect on metabolism due to its caffeine. There are no studies that show green tea by itself having a weight loss effect. 

Caffeine: Common stimulant used to increase energy, metabolism, and to promote fat burning.

Common side effects may include:

  • Headaches, withdrawal symptoms, and ringing in the ears.
  • Anxiety, mood swings, and depression.
  • Vomiting, nausea, and ill feelings.
  • Tremors, cold sweats, and involuntary muscle spasms.
  • Frequent urination and bathroom usage.

Any benefit from caffeine is also reduced to only sleep loss according to

“Habitual caffeine use leads to tolerance” 

“the effects of caffeine will be diminished, often to the point where the only benefit a user experiences is caffeine’s anti-sleep effect” 

They add that it would take a month long break in order to help bring back any of its benefits.

There’s a total of 270 mg of caffeine added per serving, The Mayo Clinic advises to get a maximum of 400 mg a day for safe effects. Otherwise, this may lead to serious side effects such as:

  • Cardiovascular damage, stroke, and heart attack. 

Therefore, it’s important to not seek out other stimulants, as this may cause severe side effects. 

L-Carnitine: Amino acid responsible for creating energy in the body.  Though it’s used to burn fat, adds:

“Supplementation of L-carnitine does not burn fat unless the individual is deficient” 

It’s because of this that use of this ingredient is not necessary. 

L-Tyrosine: Amino acid used to both reduce stress, and to preserve memories during stress. mentions its possible issues:

“may raise thyroid hormone production… could theoretically block the uptake from the gut of some drugs that resemble certain amino acids” 

Panax Ginseng: Herb used to help improve thinking, reduce stress, and improve physical endurance.

Web MD mentions the possible issues with this ingredient:

“POSSIBLY UNSAFE when taken by mouth, long-term” 

“Researchers think it may have some hormone-like effects that could be harmful with prolonged use” 

Some possible side effects that may result include:

  • Rash, itchiness, and swelling.
  • Mood changes.
  • Loss of appetite, and nausea.
  • Increased heart rate, high or low blood pressure, and menstrual problems.
  • Liver damage and severe complications. 

Though it’s unknown what kind of an effect this ingredient may have per person. Certain people have an allergy to this ingredient that may be fatal. 

Guarana Seed: Seeds of this plant are used to stimulate the body, and to provide a natural source of caffeine.

Though it’s used to help reduce weight, mentions:

“Guarana is not a fat burning compound” 

It also is known to contain much more caffeine than coffee beans. Web MD has also expressed concern over this ingredient:

“POSSIBLY UNSAFE when taken by mouth in high doses for a long time” 

“LIKLEY UNSAFE and even deadly, due to its caffeine content” 

Possible side effects that may result include:

  • Tremors, jitters and muscle spasms.
  • Rapid heart rate, anxiety, and inability to relax.
  • Insomnia, fatigue, and restlessness.
  • Feelings of paranoia, mood swings, and depression. 

If one stops to take this ingredient after repeat use, it may also lead to withdrawal symptoms.

EDITOR’S TIP: Combine this supplement with a proven fat burner such as Sletrokor for better results.

Phentaslim Quality Of Ingredients 

PhentaslimThere’s a combination of stimulants like guarana, caffeine, and green tea added. All of these additives may produce serious side effects on their own.

They also have vitamins, minerals, and amino acids that are often found in common foods.

Most of the ingredients can be substituted with foods, and the stimulants can also be replaced. Though these stimulants may increase the risk for side effects. This makes the overall quality of this supplement poor.

Relying on stimulants for weight loss is often no advised, not just due to side effects, but because of its effects not being long lasting. Stimulant formulas often need cycling, which means you can only take it for certain periods. Still, there’s no guarantee of reliable weight loss.

The Price and Quality of Phentaslim 

One 30-day bottle claiming to offer 3 to 10 pounds of weight loss, sells for $59.99.  Though they fail to provide any evidence that this amount of weight loss would be possible. They also offer no guarantee that this effect is possible.

This brand is pricy, and not all the ingredients have a proven weight loss effect. Many of the amino acids aren’t needed in most people, since they are often found in common foods.

There’s also a major emphasis on high amounts of stimulants, which don’t have long lasting weight loss effects. The caffeine is added in at 240 mg, and there’s other stimulant that include guarana and green tea. The combination of this formula may have unintended symptoms.

Many users of these pills have failed to see much benefit. As you’ll see in the “Customer Opinions of Phentaslim”, there has been a lack of benefits as well as multiple side effects. It’s due to all this, that this supplement is a poor choice. The price of this supplement is far too much, since these ingredients are common and easy to replace.

Business of Phentaslim

Optimum Nutra Inc owns this brand; the only contact information they provide is an email: 

Email: [email protected]

They do allow for returns, but this comes with a $10 fee, as well as no covered shipping and handling.

There’s a lack of information on the company online. It’s unknown how they operate, and whether or not they back up their money back return policy. Though the company does have their own testimonials, very little exists about them in any form.

There’s also other websites which claim to provide the truth about this brand, only to redirect back to the Phentaslim website.  This is likely due to the company adding fake websites that serve to make the brand seem like a good weight los solution.

EDITOR’S TIP: For the best results, our experts recommend using weight loss pills for at least 3 months. Save your money by buying a few bottles at once.

Customer Opinions of Phentaslim 

There aren’t many reviews available. Here’s what a few users have experienced:

“It is absolutely useless” 

“not a good experience, jitters, sick feeling” 

“had a horrible feeling of sickness and jitters thought my body to the point my hands were shaking” 

“quite a big increase in my need to urinate” 

Customers listed side effects and a lack of weight loss as concerns. Some experienced an increase in energy, but for many this lead to jitters and anxiety. This is likely caused by the high amount of caffeine added, which is similar to about 2 cups worth of coffee.

The types of effects people have increased include headaches, tremors, shakes, headaches, rapid heart rate, increased bathroom usage, and involuntary spasms. All these are signs of excess caffeine intake.

Though the company has their own positive reviews featured on their website, outside review are almost exclusively negative. Many have regretted using this supplement, and some couldn’t finish a bottle due to the side effects.

How Does Phentaslim Compare?
  • Product Name
  • User Rating
  • Has Good Appetite Suppressant
  • Has Only Natural Components
  • Contains No Coffee
  • Phentaslim
  • 26 /100
Conclusion – Does Phentaslim Work?

When considering a stimulant brand like Phentaslim, it’s important to look at customer reviews, and the science behind these ingredients. Many users have left negative reviews due to the numerous side effects. People have experienced involuntary muscle spasms, headaches, anxiety, insomnia and mood swings. This brand is also pricy for what’s a combination of common nutrients and cheap stimulants.

A better stimulant free solution comes from the 2020 best supplement of the year award called Sletrokor.

This supplement is made with natural ingredients for safe and effective weight loss. Many customers have experienced great weight loss benefits from this supplement. You can read about their experiences on the company website. Users mention it’s easy to take has no side effects, and it can produce real weight loss. People have mentioned that when using this supplement, it was great for quick fat loss.

Sletrokor is even backed by a full 30-day money back guarantee. So there’s no risk involved in giving this supplement a try.

2 Responses to Phentaslim Review

  1. Elliot says:

    My nephew love it, my doughter hate it.

  2. Jena W. says:

    I have been trying Diets in for 6 days also swimming at home, eating low calorie food,working out every other day at gym, doing meditation. I gaining, gained 7 lbs. in fifteen weeks according to new notes. I use to weigh 125 lbs and now i am 143lbs.

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