Phentaslim Frequently Asked Questions


Phentaslim by Optimum Nutra

To help answer the commonly asked questions about Phentaslim we have put together the answers. If you have any other questions about this supplement then please get in touch, it could be other visitors are thinking the same.


Does Phentaslim really work?

Yes, when combined with a healthy diet and exercise. This isn’t a magic diet pill and like any effective diet pills requires work from the consumer too. The list ingredients work to boost metabolism along with suppressing appetite to help increase calorie burning and reduce calorie intake.

How do I take Phentaslim tablets?

It’s recommended to take one capsule with a glass of water (8 ounces) before breakfast and another one capsule with water before lunch. The capsule size is similar to other such supplements and so shouldn’t pose any problems taking them.

We do suggest following the manufacturers advice and drinking plenty of water when taking Phentaslim, this will ensure you’re hydrated.

How quickly will Phentaslim work for me?

There are no claims of losing huge amounts of lbs in just 2 weeks from the manufacturer. We like this, as everyone is different making such claims can be misleading. That said their testimonials show consumers losing 12lbs in 3 weeks and others 28lbs in 9 weeks.

Do I have to change my diet when taking Phentaslim?

The manufacturer recommends eating a healthy diet combined with regular exercise to get the best results. This supplement can help with reducing food cravings, so making changes to your diet will be easier to tackle. There are massive long-term benefits to eating a healthy well balanced too.

Are the ingredients in Phentaslim safe?

All the ingredients are 100% safe and unless you’re particularly sensitive to caffeine (see below) unlikely to suffer any side effects.

How much caffeine is in Phentaslim?

There is caffeine in Phentaslim and so maybe not suitable for those sensitive to this ingredient. Actual caffeine comes from a few ingredients, these are:

Phentaslim caffeine content:

  • Caffeine 150mg
  • Guarana Seed 75mg (22% is caffeine)
  • Green Tea 125mg (up to 5% caffeine)
  • Total approximately: 191mg (per daily serving of 2 capsules)

This is around 1-2 cups of generic brewed coffee.

Consuming more than 500mg of caffeine per day is not required, so Phentaslim is well within this limit.

How long can I take Phentaslim for?

The manufacturer doesn’t indicator how long you can take the supplement. We generally advise not taking supplements for longer than 6 months without taking a break. This does very much depend upon your health and amount of weight you’re looking to lose.

Can I buy Phentaslim from Amazon or eBay?

Original 100% authentic Phentaslim is not available on Amazon or eBay. The manufacturer has told us that if you see them sold here they may not be original and almost certainly won’t have the money-back guarantee.

Can I buy Phentaslim from South Africa?

According to the manufacturer issues with local delivery in South Africa has meant they have needed to remove this shipping destination for the time being. They are looking at alternatives and so hopefully shipping to South Africa will resume soon.

Where can I buy Phentaslim?

You can buy Phentaslim from the manufactures official website ( and now have Spanish and German language sites available too. Prices for one bottle are $59.95 (£39.95) with discounts available for 2 or more bottles. The “best value” package costs $139.95 (£99.95) for 3 bottles (3 months) supply.

Are there any Phentaslim discount codes?

We have asked the manufacturer for a discount code and they are looking into this, so watch this space!

For more information take a look at our full Phentaslim review here.

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.

4 comments on “Phentaslim Frequently Asked Questions”

  1. Helen Peters says:

    Can I take them with erythromycin and lansopazole

  2. Steph says:

    I have just purchased my first bottle of phentaslim. I have crohns, & recently had gallbladder removed. Will I be safe to take phentaslim? I take some natural supplements from nutritionslist to aid having no gallbladder, ox bile. Follow a clean-ish diet.


  3. margaret says:

    Hi can i ask how much excercise i need to be doing daily when taking phentaslim

    thank you

  4. Batandwa says:

    I am interested in this product.How long will it take to reach South Africa Cape Town?.Converting to South African rand how much is it?

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