Phentaslim Review

Editor's Review: 3.5 / 5.0

What You Should Know

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Phentaslim is a fat burning, weight loss supplement that looks pretty fantastic at first glance. A complete list of ingredients, with amounts for each, contact phone number and clinical support for ingredients are all listed on the official website, but when we looked deeper into the company there are a few red flags customers need to know about.

List of Ingredients


  • Thiamin
  • Riboflavin
  • Vitamin B6
  • Vitamin B12
  • Zinc
  • Niacin
  • Guarana Seed
  • Caffeine Anhydrous
  • Green Tea Extract
  • Cayenne
  • Raspberry Ketones
  • L-Tyrosine
  • L-Carnitine
  • 5-HTP
  • Panax Ginseng Root

Product Features

The first six ingredients in the formula are nothing more than everyday vitamins. Pull out that bottle of vitamins you take every morning and you’ll likely find every one of these ingredient in higher doses, most of the time. Taking more of these vitamins and minerals is not going to improve overall health or weight loss. B vitamins are often marketed to increase energy, but the short half-life and the body’s inability to store the vitamins means a barely noticeable bump in energy before the body pushes those B vitamins out during urination.

Moving on to the active ingredients, we notice nothing spectacular. Guarana, green tea and caffeine are all proven to boost energy and metabolism. What dieters are looking for is this huge bump in energy and mood so they feel like eating right and exercising. That is not exactly what Phentaslim will provide. We like the fact that Phentaslim adds only 100 mg of caffeine, but guarana and green tea are both sources of caffeine, so there is more than 100 mg per serving. We have no idea how much caffeine these ingredients add, but if both are standardized to just 50 mg of caffeine the dose jumps to 200 mg per serving. We found no appetite suppressant in Phentaslim, another huge problem. Caffeine increases metabolism and thus increases hunger.

A hidden problem with Phentaslim is revealed in the terms and conditions. If order Phentaslim and you just don’t like the product, you can return it for a refund, but you will pay $10 for the return, you will not receive a refund for and original or return shipping costs and the company retains your personal contact information to sell or share with other companies.

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  • All ingredients are listed online.
  • Not too much caffeine is included per dose.


  • There are multiple stimulants in the formula.
  • The company charges a return fee.
  • Your personal information will likely be shared with other companies.


Most of the ingredients in Phentaslim are well-known, clinically tested and safe for use by healthy dieters, but the gauge of a good company is about more than just the ingredient list. Behind the scenes we find a company that sells or shares your personal information and charges you to return the product if it doesn’t work for you. You can find a more effective supplement from a trustworthy company.

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One User Review about Phentaslim

  • 1

    How long before I would expect to see results?