Phentaslim Reviewed: Does Phentaslim Work?

Editor Review: 3.5 / 5.0 editor's review
Beth Sanders

Phentaslim Review: How Effective Is This Product?

What You Should Know About This Product

Phentaslim is a product manufactured by the Optimum Nutra company. The website for the product is informative but does have an over-exaggerated tone which does make the product seem too good to be true. The site states that the product turns the user’s body into a ‘fat burning machine’ and that they will receive ‘supercharged’ results. While some of the ingredients in the formula have been independently tested, there is no evidence to show that Phentaslim actually does have this ability.

Phentaslim is sold through a secure ordering process directly from the site and a one month supply costs $79.95. However, some discounts are available and the price can be as little as $59.95. All Phentaslim products have a 30 day money back guarantee.

Ingredients Contained In The Product

Guarana, Caffeine, Green Tea, Cayenne, Raspberry Ketones, 5HTP

Phentaslim The Product Details


The Phentaslim formula is comprised of several stimulating ingredients that are responsible for the metabolism-boosting effects. These include Green Tea, Caffeine and Guarana. Amino Acids are in the formula for their fat synthesizing ability, while 5HTP is said to improve the mood, which may aid in reducing emotional overeating.

Only the key ingredients used in the formula are detailed on the site, although the full product label is shown. Because Phentaslim does include caffeine it is advisable not to take the product later than 3pm.

Strengths of Phentaslim

  • Some ingredients have been clinically proven effective
  • Key ingredients are listed and explained
  • The formula is all natural
  • Customer testimonials are provided
  • There is a 30-day money back guarantee
  • Ordering is secure and shipping is discreet

Weaknesses of Phentaslim

  • Not all ingredients are explained
  • The website is over-exaggerated
  • Manufacturer’s address is not provided
  • Phentaslim contains a large amount of caffeine
  • No clinical trial results are shown for the Phentaslim formula

Phentaslim The Bottom Line

Supplements such as Phentaslim work largely through the use of stimulating ingredients such as caffeine. There is no doubt that by taking large amounts of caffeine, the metabolism will be raised, but it may not be the safest way to do this. One positive aspect of Phentaslim is that the manufacturer does mention the importance of diet and exercise as part of a healthy weight loss* program, but they still make some exaggerated and unlikely claims for their product which does detract from their reliability to a certain extent.

Below you'll find some of the most effective diet products on the market today, we determine these products based on 4 key factors : Potential to Increase Metabolism, Potential to Meet Weight Loss Goals*, Potential to Promote Appetite Suppression, Quality of Ingredients backed by clinical studies. Ultimately, we determined the bottom-line value of each product.
Our Top 10 Weight Loss* Choices
#2 Vysera CLS
Vysera CLS
#3 GC 180 XT
GC 180 XT
#4 Plexus Slim
Plexus Slim
#5 Relacore
#6 Skinny Fiber
Skinny Fiber
#7 Final Trim
Final Trim
#8 ProbioSlim
#9 Leptiburn
#10 Sletrokor

Tips for Maintaining a Healthy and Optimal Weight

  • Eat a healthy diet and increase your activity level if you want to maximize your weight loss*
  • Try to focus on foods that are high in protein and fiber and limit your intake of trans fats
  • Make a habit of reading nutritional labels before you throw an item in your cart and choose lower calorie options whenever possible
  • Stay hydrated by drinking plenty of water to help curb hunger cravings
  • Exercise regularly to help you increase your metabolism, lose extra weight* and look more toned

**This is a subjective assessment based on the strength of the available information and our estimation of efficiency.

*Results may vary. If you are pregnant, nursing, have a serious medical condition, or have a history of heart conditions we suggest consulting with a physician before using any supplement. The information contained in this Website is provided for general informational purposes only. It is not intended as and should not be relied upon as medical advice.We do not suggest that any product alone is effective for weight loss* without acknowledging the importance of diet, exercise and restriction of caloric intake in any weight loss* program.