Fenfast 375 Review – How Does This Intechra Health Supplement Stack Up?

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By Scot Mills

Reviewed by Juliana Tamayo, MS, RDN - Last Updated

Fenfast 375 Review

Intechra Health is a family-owned producer of wellness supplements who have been around since 2012. They use clinical research and the best ingredients to create diet pills and health supplements that are at the forefront of innovative technology.

They also realize that your goal is to lose weight, and that selling you anything less than a completely effective product does them little good, seeing as to how their goal is to have you as a long-term customer.

In this review, we’ll take a look at Intechra Health’s Fenfast 375, their answer to your healthy weight loss needs.

Intechra Health Fenfast Bottle

About Fenfast 375

Fenfast 375 uses a combination of amino acids and plant alkaloids to pep up your metabolism, burn fat, suppress your appetite, and get you wired. But while Fenfast 375 does speed you up, it also contains at least one compound—L-theanine—that produces calmness, relaxation, and an enhanced sense of wellbeing.

At the same time, it helps you take control of your eating habits by keeping hunger away so that you snack less and only eat when it’s time to. It also energizes your body to burn more fat and helps your body’s chemical messengers boost your motivation and concentration.

Fenfast 375 Benefits

Fast Acting

Fenfast 375 uses ingredients such as caffeine and phenylalanine to produce its energizing effects, both of which act as soon as they reach your system. This means they go to work immediately in curbing your appetite and impulse to eat out of boredom.

Promotes Healthier Eating

When you curb your snacking and have more energy to go out and get things done, you spend less time eating poorly. That’s because the impulse to snack is based on your body’s reward system, not your need for energy intake.

By adding components that boost your overall sense of wellbeing while boosting your energy and reducing your appetite, you’ll have less need to seek reward; and since you’ll have energy to spare, you’ll also be too busy getting things done to bother with snacking.

Fenfast 375 Benefits

Proven Metabolism Enhancers

We all know of caffeine’s benefits when it comes to cranking your metabolism into gear, since most of us start our day using it for just that, and the amino acid phenylalanine is also known for its energizing effects. Add in Hordenine HCl and its ability to increase your body’s energizing hormones, and you have a formula that can significantly crank up your body’s rate of fat oxidation.

Fenfast 375 Ingredients

FenFast 375 includes 4 key ingredients in its Fenfast 375 Complex (450mg). We will take a more thorough look at each of those ingredients below.

Fenfast 375 Supplement Facts


L-Phenylalanine is an amino acid that your body needs to produce certain hormones, such as adrenaline and dopamine. Because of this, it’s often used for its energizing yet calming effects in treating conditions such as depression.

By boosting the production of these and other compounds in your body, phenylalanine also energizes you while at the same time helping you feel a sense of wellbeing and calmness.

This enables you to reduce your need for snacking as a reward, and it also gives you more energy to burn fat in the gym.


Just like other weight loss supplements, such as RazaLEAN and ProbioSlim, Fenfast also contains caffeine—and why not? It gives you energy, revs up your metabolism, and boosts fat burn, so caffeine aplenty it is.

Granted, it’s likely about a cup of coffee’s worth or less, depending on the makeup of Fenfast’s 375 Complex blend, but it is effective and has the science to prove it.

Hordenine HCl

This plant-derived alkaloid with scientific evidence backing its energizing, metabolism-boosting effects. It also increases focus and concentration while reducing your appetite so that your attention stays where it needs to be—on hitting the gym, burning fat, and staying slim.


By promoting relaxation without drowsiness, L-theanine has the wonderful ability to keep you sharp, focused, and relaxed. It’s great for stress relief, and its natural ability to lower blood pressure is a welcome counter to Fenfast’s other energizing ingredients such as caffeine, which boost blood pressure.

Does Fenfast 375 Work?

While it won’t work along with a sedentary lifestyle or poor food choices, those who adhere to a regular exercise program and health, well-balanced diet will find improved results with Fenfast 375.

And yes, while a healthy diet and exercise alone will net you results in your weight management, adding Fenfast 375 will give you the motivation, energy, and drive to stick with things for long-term success.

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Who Is Fenfast 375 Best For?

Anyone looking to burn fat, increase their energy, and improve their focus and sense of wellbeing and is not allergic to any of Fenfast 375’s ingredients will benefit from it.

But, pregnant or nursing mothers, women trying to become pregnant, children under the age of 18, or individuals using prescription drugs should not use Fenfast 375. Those who have a family history of or who currently suffer from Phenylketonuria, high blood pressure, cardiac arrhythmias, heart, liver, kidney, thyroid, or psychiatric disease, pheochromocytoma, diabetes, asthma, recurrent headaches, anemia, nervousness, anxiety, depression or other psychiatric condition, peptic ulcers, Parkinson’s disease, glaucoma, difficulty in urinating, prostate enlargement, or seizure disorder should consult a physician before using it, and caution should be taken when using it along with other stimulants.

Finally, there are other warnings that require you to read THE PRODUCT’S ENTIRE LABEL before using, so please read them all since we’re running out of room here.

Fenfast 375 For Adults

Claims vs. Reality

Intechra’s claims and reality coincide nicely with this product and, used as directed along with a balanced diet and exercise, you should see results within a short period.

Is Fenfast 375 Safe?

While the product is mostly safe, you still need to read the entire label before using it. Remember that it contains caffeine and other stimulants that can boost blood pressure, and you should also avoid overuse by monitoring and cutting back on other stimulants such as coffee, ephedrine, or tea.

It can also cause frequent urination, prostatitis, high blood pressure, and dizziness along with many other side effects, so again, READ THE ENTIRE LABEL BEFORE USING THIS PRODUCT.

Where To Buy Fenfast 375

At $49 for 30-days-worth, Fenfast 375 is close to being reasonably priced, and they offer volume discounts to bring your cost down even more. For instance, by ordering a 6-month supply, your cost goes down to $38.17, and there are 2-bottle and 3-bottle options as well.

You also get free shipping if you order 2-or-more bottles, and the company offers a 100%, 30-day money-back guarantee.

FenFast Website

Fenfast 375 is also widely available through both online and brick-and-mortar retailers, including Walmart, Amazon, and many independent stores specializing in weight loss supplements.

Overall Rating:
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Scot Mills

Scot Mills is a nutrition writer who uses his unique skills and passions for natural products to share his research with others. Along with over twenty-years of experience working in natural industry sales, Scot graduated at the top of his class as a business major, and is a member of the Sigma Beta Delta honors society for his outstanding scholastic achievements. Scot specializes in using the latest scientific research to review supplements objectively. When he isn’t writing or hitting the gym, Scot can be found enjoying nature on epic trail runs, hikes, and mountain bike rides.