Updated: 01/18/2018

Thyrene Review - 6 Things You Need to Know


The results of my research into Thyrene were somewhat surprising. We did an in-depth review of the ingredients, side effects, clinical studies and the quality of the company service behind the product. We also looked at as many online comments as we could. We then summarized and condensed to give you the bottom line.

Thyrene Readers: Click here to find out why we're giving away samples of our product, Burn HD.

What You Need to Know

To start, Thyrene boasts a cocktail of ingredients designed to suppress appetite and help dieters lose weight through reduced caloric intake. Some include vitamin B12 and B6, calcium, sodium, kelp, tyrosine, phosphorus, potassium and more. These pills are convenient and easy to take anywhere.

Thyrene has been a popular diet supplement since 2010. It supposedly stimulates the thyroid to help boost fat loss and because there are no energy stimulants, this pill can be taken multiple times per day. It is readily available online and can be purchased in most health stores, but read on…

Products Similar to Thyrene

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Burn HD (Sample offer)read

Price – “Wowsers?”

The first consideration we have with Thyrene ingredients is the huge price tag. Most companies selling this product recommend you take this with at least 1 additional supplement, a metabolism booster, and some suggest you add even more formulas. “These aren’t expensive by themselves,” said our Research Editor. “But when you add in the cost of the recommended stacks, the total cost can be $150-300 per month.”

“By itself Thyrene does nothing for me, but with the stack I can’t afford to keep taking it. It’s kind of a catch-22,” said one user.

“I thought I could afford this, but when I looked at the additional recommended products, I realized there was no way I could buy these every month,” explains another.

Lack of Results – “We’re Concerned”

For customers that didn’t opt to buy the entire stack of products, results were minimal or non-existent. Some saw minimal weight-loss when they followed diet and exercise plans, while others saw no change without a significant change in their lifestyle. “I used Thyrene for 2 months and only lost 3 pounds,” said one buyer.

“Thyrene is expensive and did nothing for me. I still felt hungry all the time,” explains a dieter.

According to our researchers, whenever there is an aspect of a diet supplement, weight-loss program or exercise routine that is troublesome (painful workouts, cost, side effects, lack of results, etc.) the dieter is less likely to achieve long-term success. If Thyrene really doesn’t help like many of the reviews say, it could turn the user off rather quickly.

The Science – “Legitimate?”

Thyrene has plenty of strong claims about how it will perform for those trying to lose weight, but unfortunately those promises are not backed up by science. There have been no clinical studies supporting this supplement. At DietSpotlight we value information on a product, so when that research is missing, it leads us to a ton of questions.

What Users Are Saying

"”Best product. Does not make me jittery and I definitely sweat more than usual!”"

"”I used before & lost weight. This time I’m on my 2nd bottle & they’re doing nothing.”"

"”For me I really don’t think they do much, they may work for someone else. I would guess they work somewhat different for everyone. Great price.”"

The Bottom Line – Does Thyrene Work?

So now, what is the bottom line on this supplement? At first we were excited to look at Thyrene because it was easy to purchase, had some good reviews and was free from side effects, but in the end we were disappointed and felt skeptical about giving our recommendation. It has no scientific studies proving their claims and ingredients are supported by clinical research. The recommended stacks to take with this one can get very pricey.

If you’re looking to slim down without the hassle and expense of a product like this, we suggest a supplement that offers scientific proof that its results will help you lose weight that’s available at an affordable price point.

Among the best products we’ve seen this year is one called Dietspotlight Burn. It contains just four ingredients, which the makers have combined in a proprietary blend proven to help speed weight-loss by boosting your metabolism and burning fat. We’ve read the reviews online and customers seem to agree that this is an effective way to lose weight without negative side effects.

For a limited time, the makers of Dietspotlight Burn are offering a Special Trial Offer; putting their product on the line because they’re sure you’ll love it!

Learn More About Burn HD »
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What are the side effects of Thyrene?

Thyrene side effects reported by some customers include skin irritation, upset stomach, increased heart rate and nausea.

What are the ingredients in Thyrene?

Thyrene ingredients include l-tyrosine, coleus forskholii, guggulsterones, l-carnitine, poly-thyronine and alpha lipoic acid.

How do I know if Thyrene is right for me?

Choosing the right product is the #1 question asked by DietSpotlight readers. We recommend trying any product before buying it and know that finding a product with a sample offer is near impossible - so we created our own product, Burn HD, with scientifically backed ingredients.

Click here to get your sample of our powerful fat burner today.

Does Thyrene work?

There’s information about Thyrene being scientifically-engineered, but there’s no research showing the supplement will work. We found solid science backing coleus forskholii, but it doesn’t relate to this product.

You may want to take a hard look at Thyrene, think about what you want out of a weight-loss supplement and consider a supplement containing some clinically-tested ingredients like Dietspotlight Burn.

How much does Thyrene cost?

Thyrene costs $26.99 for a 30-day supply.

How should I take Thyrene?

You should take one or two Thyrene capsules per day. The company doesn’t recommend taking anymore or using prior to sleep.

If I use more than the recommended serving of Thyrene, will I lose more weight?

There’s no evidence that taking more than the recommended serving of Thyrene will help you lose more weight.

Can women and men take Thyrene?

Yes, women and men can take Thyrene, but you should consult with a healthcare professional prior to using any weight-loss supplement.

Does Thyrene come with a guarantee?

Yes, Thyrene comes with a 30-day guarantee. Prior to returning the supplement, you will need to contact the customer service department.


Previous Thyrene Review (Updated January 20, 2014):

What You Should Know

Thyrene is a product from Metabolic Nutrition that claims to boost fat loss by stimulating the thyroid. There are no stimulants in this formula, which could mean no fat loss or increased metabolism. We are not fond of thyroid stimulating supplements that make huge claims without any support for those claims. We know that 3, 5 Diido-L-Thyronine has some clinical support, but Metabolic Nutrition fails to use that support to validate this supplement.

Dieters looking to boost weight loss with a safe and effective supplement may wish to choose a different product. We could find no clinical studies supporting this supplement and one of the ingredients is available only from Metabolic Nutrition with no information about what it is or what it does listed on the website.

List of Ingredients


  • Folate
  • Vitamin B12
  • Calcium
  • Iodine
  • Potassium
  • Vitamin B6
  • Phosphorus
  • L-Tyrosine
  • Coleus Forskohlii
  • Guggulsterones
  • Di Potassium Phosphate
  • Calcium Phosphate
  • Sodium Phosphate
  • 3, 5 Diido-L-Thyronine
  • Kelp
  • Meridextrine

Product Features

Losing weight is about burning more calories than you consume. The thyroid plays an important role in the rate of your metabolism, but not many natural supplements have an effect on thyroid function, despite the outrageous claims of some companies. Thyrene makes those same outrageous claims, but at least one ingredient has been tested with positive weight loss results - 3, 5 Diido-L-Thyronine. Metabolic Nutrition does not list the available clinical support for this ingredient, however. That could be because the weight loss associated with the ingredient is not that remarkable.

The other ingredients in the Thyrene formula are commonly found in other weight loss supplements. None of them have a significant impact on metabolism as none have stimulant properties.

The instructions for taking the supplement are more confusing than some other products. The dieter is supposed to start off by taking one capsule three times a day. Then, after gauging how the body reacts, up the dose to two capsules three times a day. There is no description of the possible feelings the dieter could have or how to gauge if the supplement is too strong and since there are no stimulant ingredients we're unsure how the dieter is supposed to know when to up the dose.


  • We easily found the ingredients online.
  • No stimulants so the supplement can be taken multiple times a day.


  • The dieter is left to choose when to take the maximum dose.
  • No stimulants means no increase in metabolism.
  • No appetite suppressants included in the formula.


Thyrene could be considered a safe supplement, but there is one problem. Meridextrine is an unknown ingredient found in most Metabolic Nutrition supplements. We've said throughout that this supplement contains no stimulants, but that may not be completely true. There is a chance that Meridextrine is a stimulant and if that is the case, some dieters may feel negative side effects.

Summer Banks Dietspotlight Author
About the Author:

Summer Banks, Director of Content at Dietspotlight, has researched over 5000 weight-loss programs, pills, shakes and diet plans. Previously, she managed 15 supplement brands, worked with doctors specializing in weight loss and completed coursework in nutrition at Stanford University. full bio.

2 Thyrene Reviews

  • The New Formula is amazing
    Jeremy (Verified User)

    I have been an avid fan of Cellucor (although I know its expensive) I have been using CLK & Super HD (8 weeks on 3 weeks off) for about 2 years!… However, after I was given a sample of Synadrex (*The New Formula is amazing!!) about a week ago I have decided to start a new stack using Synadrex, Thyrene, Phenolox, & a simple Multi-vitamin (and cellucor CLK).
    My plan is to alternate Synadrex and Phenolox (Synadrex on Monday and Phenolox on Tuesday *1pill a day) then add Thyrene after a week (*1pill a day) and continue taking CLK (up to 6 pills a day but I usually only take 3)
    One thing people need to understand is that there are no miracle pills on the market… if there were, the government would paten it, classify it as a controlled substance and only give it to the soldiers in the army 😛 lol

    On a more serious note: (*I can not rate this product yet) As far as Thyrene goes…. metabolicnutrition.com states:
    Due to the strength of THYRENE, please assess your tolerance by initially taking only 1 capsule upon awakening for the first 3 days. After assessment, if effects last longer than 15 hours, consider altering dosage to every other day. With caution, you may increase up to 1 capsule in the AM and 1 capsule at Noon. DO NOT exceed more than 2 capsules daily or 12 hours prior to desired bedtime.
    Only Synedrex, Phenolox and Hydravax may be combined with THYRENE for a more customized weight loss solution. DO NOT combine with other non approved supplements or medications.