Phentaslim Review – 11 Things You Need to Know

Phentaslim Review 

											- 11 Things You Need to Know
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Phentaslim claims, “In less than one minute a day, you can supercharge your life.” The supplement offers “powerful” ingredients targeting weight loss. However, our research team wanted to better understand the connection between the ingredients and weight loss.

After focusing on the benefits of the ingredients, our team studied reviews and testimonials. Then, we highlighted research supporting or disproving the claims. Finally, we gathered the facts to give you need.

Phentaslim can be purchased through their Official Site.

Phentaslim Readers: Noom is offering our readers a risk-free trial, for a limited time. Click here for more information!

Phentaslim Video Review


What is Phentaslim?

Phentaslim is a dietary supplement claiming to “destroy your hunger pangs and annihilate your body fat.” The supplement contains 17 ingredients. Here’s a little research into some of the ingredients.

Customer Service Contact Information

You can contact their customer service information through their form online They are located at Optimum Nutra LLC. 680 S Cache Street, Suite 100-8640 Jackson, WY 83001, USA.

How Did Phentaslim Start?

The company behind Phentaslim is OptimumNutra. Founded in 2011, OptimumNutra is on a mission to provide “pure and potent” ingredients and supplements to maintain health and well-being.

Phentaslim Competitors

Beyond Raw LIT
Lipo 6 Black
Phedra Cut Ultra XT

Phentaslim Claims

Phentaslim claims include:


Phentaslim Ingredients

This supplement contains the following ingredients:

  • Green Tea (15:1) (375mg)
  • Caffeine Anhydrous (270mg)
  • L-Theanine (225mg)
  • N-Acetyl L-Carnitine (200mg)
  • L-Tyrosine (200mg)
  • Korean Panax Ginseng (40:1) (1200mg)
  • Guarana Extract (4:1) (400mg)
  • Ginkgo Leaf Extract (120mg)
  • Magnesium (80mg)
  • Cayenne Powder (8:1) (50mg)
  • Black Pepper extract (4:1) (24mg)
  • Vitamin B12 (as Cyanocobalamin) (10mcg)
  • Vitamin B6 (as Pyridoxine HCL) (1.8mg)
  • Niacin (Vitamin B3) (20mg)
  • Riboflavin (Vitamin B2) (1.3mg)
  • Thiamine (Vitamin B1) (1.3mg)
  • Zinc (15mg)

Guarana Seed

This is an ingredient that we extract from fruit. It contains caffeine that can cause adverse reactions to people sensitive to it. People take guarana to lose weight, improve mental and athletic performance.


This is a significant component since it boosts the metabolism and curbs hunger while retaining and elevating energy levels. This ingredient, however, can cause jitters.

Panax Ginseng

According to the Annals of Pharmacotherapy (2002), Panax ginseng “improves aspects of mental health and social functioning after four weeks.” There’s no current research supporting the claims of Panax ginseng improving mental health.


While magnesium is commonly used in supplements for its laxative effects, there’s research showing magnesium is “required for energy production,” according to the National Institutes of Health.

Black Pepper Extract

According to the journal Critical Reviews in Food Science and Nutrition, the key alkaloid in black pepper extract, piperine, may assist in “cognitive brain functioning, boost nutrient’s absorption and improve gastrointestinal functioning.” However, there’s no current research supporting the claims of black pepper extract.

Green Tea Extract

The Journal of Oral and Maxillofacial Pathology concluded, green tea is a “cheap habit to maintain a healthy lifestyle.”

Vitamin B6

Vitamin B6 is found in foods such as fish, potatoes, poultry, bananas, and chickpeas. The vitamin may also help with muscle growth by boosting the absorption of amino acids, claims the NIH Office of Dietary Supplements.

Vitamin B2

Vitamin B2 plays a role in the development, function and growth of cells. Sources of riboflavin include meat and dairy, legumes and beans, eggs, and some seeds and nuts.

Vitamin B1

You can find thiamine in foods such as grains, yeast, nuts, beans, and meat. Thiamine plays an essential role in energy metabolism.

Does It Work?

Does Phentaslim Work?

So, does Phentaslim work? There are reviews offering support of this dietary supplement. There’s even research supporting the effectiveness of some of the ingredients. However, the effectiveness of a supplement varies from person to person.


Phentaslim Benefits

Based on the official website, benefits include:

  • Burns fat
  • Reduce cravings
  • Burn calories
  • Boost energy
  • Mental clarity
  • Boost health

How to Use Phentaslim

You’ll take one capsule twenty minutes before breakfast, lunch, and dinner. You’ll need to take each capsule with a full glass of water. If you’re sensitive to caffeine, take the third capsule earlier in the evening or late afternoon.

Side Effects

Potential Phentaslim Side Effects

The official website doesn’t address Phentaslim side effects. However, there’s a chance some users may experience side effects from ingredients, including:

  • Jitters
  • Nausea
  • Headaches

Phentaslim Pricing

Phentaslim pricing depends on the package purchased on the official website. Pricing is:

  • Single bottle – $49
  • Two bottles + One free bottle- $98
  • Three bottles + Two free bottle – $147

What’s the Phentaslim return policy?

If you want to return the supplement to the manufacturer, you have 60 days from the date of purchase to return Phentaslim.

Pros and Cons

Phentaslim Pros and Cons


  • 60-day money-back guarantee
  • Natural ingredients


  • No current research is supporting claims

Phentaslim Alternatives

Phentaslim alternatives include:


Phen 375 is an appetite suppressant just like Phentaslim, and its ingredients are very similar. They include stimulants like caffeine and cayenne pepper.

Superfruit Slim

Superfruit Slim is a dietary supplement from the same company. While both claim to promote weight loss, there’s no research supporting the effectiveness of the supplement.


PhenQ is a supplement containing ingredients similar to the supplement. The supplement also claims to promote weight loss and increase energy levels.


Phenocal is a dietary supplement offering clinically-researched ingredients; similar to Phentaslim. But, there’s no clinical evidence the combination of ingredients is more effective than the others.


Abidexin claims to promote weight loss by suppressing appetite and boosting energy levels. While there’s research supporting the effectiveness of some of the ingredients; there’s only anecdotal evidence Abidexin works.

Bottom Line

The Bottom Line on Phentaslim

Phentaslim is formulated with some popular ingredients, which means it really doesn’t stand out from the crowd. We expect you may see increased energy and possibly lose some water weight, but it’s critical to eat a healthy diet and exercise to truly lose weight.

While there are some benefits, there are also alternatives to add to your existing weight management plan, like a clinically proven weight-loss app.

One of the best apps we’ve seen this year is Noom. The program is backed by years of research and clinical proof it works to help you lose more weight and keep it off. There’s human coaching, personalized meal plans, expert advice and more.

Also, the team behind Noom wants everyone to take the app for a test drive, so Dietsupplement readers can access the app as part of a free trial offer.

Learn More About Noom »

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What is Phentaslim?


Phentaslim is a dietary supplement that claims to help with weight loss, mental clarity, reducing cravings, boosting energy, and overall health.

How does Phentaslim work?


Phentaslim works by using a combination of ingredients that target fat burning, calorie burning, mental clarity, reducing cravings, and boosting energy levels.

Does Phentaslim actually work for weight loss?


While there are reviews and research supporting the effectiveness of some of the ingredients, the effectiveness of a supplement varies from person to person, and results may not be guaranteed.

What are the benefits of using Phentaslim?


Phentaslim claims to help with fat burning, reducing cravings, burning calories, boosting energy, mental clarity, and overall health.

What are the side effects of Phentaslim?


Phentaslim side effects, based on user reviews, were mild.

Where can I buy Phentaslim?


Phentaslim can be purchased using their Official Site.

What are the ingredients in Phentaslim?


Phentaslim is an all-natural weight loss supplement that contains some of the best fat-burning ingredients available, including green tea extract, caffeine anhydrous, guarana seed extract, Synephrine HCl, pine bark extract and chromium. These ingredients are scientifically proven to help boost metabolism and energy levels while suppressing appetite and reducing cravings for unhealthy foods. Phentaslim also contains a blend of soothing herbs such as green coffee bean extract, black pepper extract, ginger root powder and licorice root to help reduce stress levels and improve mood.

Does Phentaslim work?


The Phentaslim formula is not bad. It contains green tea and caffeine, two important ingredients. However, you can find these in hundreds (if not thousands) of other products.

How much does Phentaslim cost?


Phentaslim costs are the following:

  • Single bottle – $49
  • Two bottles + One free bottle- $98
  • Three bottles + Two free bottles – $147

How should I take Phentaslim?


You should take Phentaslim three times a day, once 20 minutes before breakfast and lunch and once in the late afternoon. It is not suggested to take Phentaslim after 5pm.

Can I take Phentaslim if I have a health condition?


You should ask your physician if you are under the age of 18, if you are taking prescription medications, have other underlying health problems, are pregnant, or nursing.

Does Phentaslim come with a guarantee?


Phentaslim has a 60-day money back guarantee.

How long does it take to see results with Phentaslim?


The time it takes to see results may vary depending on the individual and how their body reacts to the supplement.

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