Fastin Diet Pills Review – Do They Actually Work?

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By Leslie Waterson

Reviewed by Juliana Tamayo, MS, RDN - Last Updated


Weight loss supplements are nothing new, and it’s fair to view any supplement that claims to boost fat loss with skepticism. The fact is that diet pills and supplements are a big business and the people who make them stand to make a lot of money if they can get people to buy their product. 

Lucky for you, we’re here to take a look at these products and help you determine which ones actually work, and which ones are a waste of your money. There are, in fact, supplements that really will help you lose weight, but there are also plenty of them that are useless. 

If you’re reading this, you’re wondering if Fastin is one of the ones that work, or not. Don’t worry, we’ll lay out all the facts for you.

Hi-Tech Pharmaceuticals Fastin
NOTE: We currently recommend Skald over Fastin Diet Pills. Here’s why

Overview: What is Fastin?


Fastin is a stimulant pill, but unlike most stimulant pills it doesn’t use caffeine. The compound it uses is phenylethylamine. This is a substance that occurs naturally in the body and is used as a neurotransmitter. Fastin promotes it as a way to naturally increase lipolysis or fat loss.

They also claim that it will curb appetite while also making you feel better overall. Phenylethylamine has been promoted by other companies as an antidepressant, so it may indeed make you feel good.

One thing to note about phenylethylamine is that it is very similar to amphetamines. In fact, they affect your body in almost the exact same way. Amphetamines are, essentially, an artificial version of phenylethylamine. You can expect Fastin, therefore, to have affected you in much the same way that amphetamines would, although the effects won’t be nearly as extreme. 

Advantages and Benefits of Fastin

  • No prescription necessary
  • Ample evidence of its effects as a stimulant
  • The main ingredient is a compound naturally produced by the body
  • Won’t cause jitters like a caffeine pill
  • High level of user satisfaction
  • Based on user reviews and reports, it seems to actually work

Disadvantages of Fastin

  • Almost no scientific support
  • All evidence of success is based on user reports
  • This stimulant is very similar to meth-amphetamine
  • Can cause dangerously high heart rate
  • Can increase anxiety
  • Can cause the same side effects that amphetamine use causes

Who is the manufacturer of Fastin?


Fastin is made by Hi Tech Pharmaceuticals. Hi Tech focuses on sport nutrition and weight loss supplements. They are one of the largest manufacturers of supplements in the country, with a huge range of products. Users of their products tend to rate them highly. That said, they have a reputation for including ingredients that are untested and potentially unsafe in many of their supplements. 

Hi Tech Pharma has a history of skirting the line in their marketing and manufacturing. Most of the products do have some proven benefits, but they also tend to have scary side effects. This company also uses some sketchy marketing practices, and is almost always locked in a legal battle with government agencies or medical professionals for one reason or another.

What are the Ingredients of Fastin?

Phenylethylamine HCl, methylsynephrine HCl, theobromine anhydrous, dextrose, micro crystalline cellulose, hydroxypropyl methycellulose, stearic acid, magnesium stearate, sodium starch glycolate, starch, silica, and a handful of other compounds. 


How Does Fastin Work?

Fastin uses phenylethylamine to stimulate the central nervous system and boost your metabolism. You burn fat by burning more calories, without having to exercise more. 

This is well-established mechanism. It isn’t surprising that many users have reported success with this supplement, because we know that boosting the metabolism can increase fat-burning, and we know that the active ingredient in Fastin will boost your metabolism. No surprises here.

Safety and Side Effects


Fastin can cause heart palpitations and tachycardia- irregular heart beat. It can also overstimulate your nervous system and cause insomnia, or even psychotic episodes.

Diarrhea, unpleasant taste in the mouth, constipation, and impotency are also possible side effects. If you are pregnant or breast feeding, this product is unsafe. 

It can be dangerous to use Fastin if you drink alcohol. 

The active ingredient in Fastin is very similar in composition and effect to meth amphetamine, and there is a risk that users of Fastin may develop a chemical dependency, although there’s not enough information to state how serious that risk is. 

Where to Buy Fastin Pills


A bottle of 45 capsules costs $49.95 when purchased directly from

NOTE: We currently recommend Skald over Fastin Diet Pills. Here’s why

Fastin Diet Pills Review: Is This Supplement Worth the Money?

Possibly. It will boost your metabolism, and it will likely help you to lose weight. 

There are a lot of potential side effects, though, and there is virtually no medical evidence that this product is safe. The manufacturer doesn’t exactly have a great reputation either, although we can’t deny that the people who use their products do seem to like them. That doesn’t change the fact that they routinely use sketchy ingredients and have a long history of suing the FDA to get them to allow the manufacture and sale of demonstrably unsafe supplements. 

The active ingredient in this product is, essentially, your body’s version of amphetamine. Or, more accurately, amphetamines are an artificial version of this product. 

It’s a judgment call. The people who use this supplement generally seem happy with it, and report losing weight with it. It’s just that it could cause major health problems for you down the line. We can’t deny that it will probably help you burn more fat, but we also can’t say that it’s definitely worth buying.

We can say it will probably help you lose weight. It looks like a lot of people have successfully lost weight using it without suffering any serious side effects. It might be useful in the short term.

It is not clear what sort of effects it will have on your long term health, though, and if you use this product for weight loss you may not develop the necessary habits to keep the weight off forever.

Overall Rating:
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Leslie Waterson

Leslie has been passionately involved in the health and fitness industries for over a decade. She is constantly reviewing the latest scientific research and studies in order to take a research-backed approach to lifestyle optimization. Her main areas of interest include nutrition and supplementation. Leslie shares her findings on Fitness Clone to help other health enthusiasts choose the products and routines that will help them achieve their goals.

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