XPI Syntheroid Review

Overall Rating:


Positives Negatives
  • Contains D-Aspartic Acid, Boron and Fenugreek
  • Need Improving
  • Missing Core Nutrients
  • Numerous ineffective ingredients

Review Overview – What does XPI Syntheroid do?

Made by XPI, this is an all natural testosterone booster that is claimed to promote:

  • Strength
  • Testosterone
  • Muscle
  • Sexual Vigor


But how effective is it really?

In this review, we closer at Syntheroid and see how effective it really is.

This is what you need to know:

How are the servings?

They could be better.

With only 2 servings a day, there’s only so much benefit you can expect to get from this testosterone booster.

For the best results you need something that supplies your body with 3 – 4 servings a day.

This makes sure your body is being supplied constantly with the nutrients it needs so your body is constantly in that pro-testosterone mode.

What about the ingredients in XPI Syntheroid?

Not great.

There are a lot of ineffective ingredients in this product and that’s not good.

A lot of these nutrients were once thought to help boost testosterone – but then studies showed otherwise.

Overall, there are only 3 ingredients here that help boost test – take a look:xpi-syntheroid-side-effects

D Aspartic Acid

One of the better options for testosterone production.

DAA is a great addition, and used by our bodies to create the luteinzing hormone (LH).

This is your body’s main resource for creating testosterone and growth hormone.

With more LH – the more T you’ll have overall.


Another good option.

Fenugreek has been seen to help improve libido and testosterone.

With its ability to help regulate blood sugar, Fenugreek can contribute to lowering overall insulin levels.

Insulin directly interferes with and lowers testosterone, so less of it you have in your system, the more opportunity your T has to rise.


A poorer choice.

Tribulus Terrestris is one of the worst T-Boosters on the market.

Marketed as a testosterone booster, the actual studies behind Tribulus have shown different results.

In reality it has very little impact on T-levels, and at most helps raise libido to a minor extent.

Horny Goat Weed

Another poor performer.

Mainly given popularity because of its name Horny Goat Weed was thought to help raise testosterone and sex drive.

Again however, studies have shown that it has no real effect on T, and may only help libido to a minor extent.


Sadly Maca is just a bad.

Thought to raise testosterone – only supports libido, and the effects are unreliable.

Eurycoma Longifolia

Another bad choice.

Also known as LongJack, this nutrient has been known to have a small impact on sex drive – but does nothing to testosterone levels.


A much better option.

Boron has been seen to raise testosterone and lower estrogen levels in several studies.

It’s one of the best options in Syntheroid.


Nothing special here, essentially black pepper.

May help with overall absorption.xpi-syntheroid-results

Ingredients Bottom Line:

On the whole, this isn’t the best nutrient profile for a testosterone booster.

There are only 3 good ingredients in here, the DAA, Boron, and Fenugreek.

After that you’re dealing with nothing more than poor libido boosters.

It’s not your best option if you want to see real results.

Side Effects

There have been no side effects reported with this testosterone booster.

However, although it doesn’t have negative effects, it doesn’t have that many positive ones either.

It’s just not that strong.

Is there anything better than this Testosterone Booster?

There absolutely is.

We’ve done the research, and looked far and wide for the best supplements on the market that promote:

  1. Muscle Gains
  2. Fat Loss
  3. Testosterone Levels
  4. Energy
  5. Mood
  6. Sex Drive

And it we’ve finally narrowed it down to just three.

These are the best testosterone boosters on the market, that both myself and our readers agree provide the best results. You can check them out below:

The 3 Best Testosterone Boosters

XPI Syntheroid Review Conclusion

On the whole this isn’t the best testosterone booster on the market.

From this review, this is what you need to know about Syntheroid:

  • Servings need improving – Not enough per day to keep testosterone levels on the rise.
  • Ineffective ingredients – Many of the nutrients used lack clinical evidence for their effectiveness.
  • Missing core nutrients – Zinc and Magnesium and other core ingredients would’ve made a huge difference here.

As you can see, it’s not your best option.

To see our readers, and editor are currently using, click the link below to see our current #1 rated T-Booster. We’ve given it our full review and it’s easily the safest and most effective we’ve seen:

Our #1 For Boosting Testosterone - TestoFuel

Out of all the T-Boosters I've tried, TestoFuel is the best for Maximum Muscle Gains.

It also:
- Added Strength
- Cut Body Fat
- Boosted My Energy

I took it for 3 Months and I saw some INSANE results!

Review Date
Reviewed Item
XPI Syntheroid
Author Rating