DNA Lean Test-FX Testosterone Booster
DNA Lean Test-FX Testosterone Booster with summary points
Test-FX product information
DNA Lean Test-FX Supplement facts
DNA Lean Test-FX Testosterone Booster Key Ingredients
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Test-FX® T-Boosters™ For Men 150 Caps (12 NATURAL INGREDIENTS)

Evidence-Based Support For Testosterone
KSM-66®, Fenugreek, ZMA® & More
Optimally Dosed 5 Capsule Serving
Built For Men Who Feel The Dip
£44.99 £49.99

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Free 48 hour shipping over £50 | Free 24 hour shipping over £90

On non-training days: Take one (1) serving of five (5) capsules with water before bed. On training days: Take one (1) serving of five (5) capsules with water one hour before working out. Can be taken with or without food. To be consumed on a daily basis.

Test-FX® V 2.0: The Science-Based Men's Hormone Support Solution

Test-FX Version 2.0, our potent new T-Support, isn't just a supplement; it's a properly dosed evidence-driven nutritional supplement designed to provide daily support for healthy testosterone levels in the blood.

Who should use Test-FX?

While literally anyone can benefit from Test-FX's essential evidence-based ingredient profile, it could be potentially beneficial for those seeking support for muscle gain, male energy, or if you're over the age of 30.

Featuring four effective trademarked ingredients - KSM-66®, TestoFen®, Vita-Algae® D3, ZMA® - our unique formulation provides comprehensive nutritional support.. 

Test-FX also includes an additional stack of eight well-documented natural compounds.

We've carefully chosen essential minerals and key vitamins that play important roles in maintaining normal and healthy testosterone levels, effectively supporting your body's natural hormone production.

But the star of the show is KSM-66 Ashwagandha, an ancient Ayurvedic herb, standardised for quality and purity ensuring the exact same quality in every single batch.

Various strong lines of evidence suggest KSM-66 Ashwagandha has a multitude of health benefits. including potential benefits for stress reduction, cognitive function, and T-levels.

Let's be clear - we don't claim that by taking Test-FX you'll magically transform into the incredible Hulk.

However, what Test-FX will do is give you a legitimate edge in maintaining your testosterone levels naturally.

As a result, this can positively impact male energy, well-being, performance, and recovery from exercise.

No proprietary blends, no artificially stimulated energy and no over-exaggerated promises. Just clearly specified ingredients, meaningful dosages and an evidence-based formula designed to complement your training, nutrition and everyday routine.

Vitamin K2 MK7 (Menaquinone-7), 5mcg
Vita-Algae® D3 Vitamin D (Cholecalciferol), 75mcg
ZMA® Complex:
Vitamin B6 (from Pyridoxine HCI), 10mg
Magnesium (from Magnesium Citrate, Magnesium Oxide), 429mg
Zinc (from Zinc Aspartate and Zinc Mono-L-methionine), 29mg
Selenium (from Sodium Selenite), 55mcg
Fenugreek Seed Extract 33:1 (Testofen® ), 600mg (300mg Saponins)
KSM-66® Organic Ashwagandha root extract 12:1, 300mg (15mg Withanolides)
Ginseng Korean Extract 10:1, 100mg (20mg Ginsenosides)
Grape Seed Extract 120:1 (Vitis vinifera L.), 75mg (71mg Proanthcyanidins, of which 68mg Polyphenols)
Maca Extract 10:1 (Lepidium meyenii), 50mg (45mg Maca Extract)
Nettle Leaf Extract 20:1 (Leaves of Urtica dioica), 50mg (48mg Nettle Leaf Extract)

Evidence-Based Nutritional Support for Active Men

Test-FX® is designed for adult men who want to complement their training, nutrition and daily routine with a comprehensive, fully disclosed combination of essential nutrients and standardised botanical extracts.

Its formula is particularly relevant to men looking for nutritional support in three important areas:

  • Normal Testosterone Levels: Zinc contributes to the maintenance of normal testosterone levels in the blood.
  • Muscle Function: Magnesium and vitamin D contribute to the maintenance of normal muscle function.
  • Energy and Fatigue: Vitamin B6 and magnesium contribute to normal energy-yielding metabolism and the reduction of tiredness and fatigue.

Alongside these essential nutrients, Test-FX® provides carefully selected branded botanical extracts, including KSM-66® ashwagandha and Testofen® fenugreek, with clearly declared quantities and standardisations.

Whether you're committed to regular training or simply value a comprehensive nutritional approach to everyday wellbeing, Test-FX® delivers transparency, quality and meaningful ingredient disclosure, without proprietary blends or exaggerated promises.

Order before 2pm on a working day and we’ll aim to dispatch your order the same day.

Enjoy free 48-hour shipping over £50 or free 24-hour shipping over £90.

Once your order is on its way, you’ll receive your delivery confirmation and shipping details via email, so your never left in the dark.

Every order is fully tracked and fully insured.
Test-FX® T-Boosters™ For Men 150 Caps (12 NATURAL INGREDIENTS)
£44.99£49.99

Ingredients in-depth

Learn more about what’s in this product

Vitamin K2 (MK-7) - Bone Health & Normal Blood Clotting

Essential Nutritional Support for Strong, Healthy Bones and works in conjunction with Vitamin D3

Test-FX® provides 75 µg of vitamin K2 as menaquinone-7 (MK-7) per serving, delivering 100% of your daily Nutrient Reference Value (NRV).

Vitamin K contributes to the maintenance of normal bones, making it an important nutrient for physically active men who want to maintain a strong skeletal foundation throughout life.

Vitamin K also contributes to normal blood clotting, an essential physiological process involved in the body's natural response to injury.

We've selected MK-7, a specific form of vitamin K2, and clearly disclose its form and dosage, ensuring you know precisely what you're getting in every serving.

Vitamin D3 - More Than Just Bone Health

Test-FX® provides 75 µg of Vita-Algae® vitamin D3 per serving, delivering an essential nutrient with several established physiological roles.

Vitamin D contributes to the maintenance of normal muscle function, normal bones and the normal function of the immune system.

For active men, these are important foundations of everyday health and physical function. Combined with the formula's zinc, magnesium and vitamin B6, vitamin D3 forms part of a comprehensive approach to men's nutritional support.

Hormonal Regulation, Energy Metabolism and Reduced Fatigue

Test-FX® provides 10 mg of vitamin B6 per five-capsule serving as pyridoxine hydrochloride, included as part of the ZMA® complex.

Vitamin B6 contributes to the regulation of hormonal activity, normal energy-yielding metabolism and the reduction of tiredness and fatigue.

It also contributes to normal protein and glycogen metabolism, an important physiological process for anyone maintaining an active lifestyle.

Alongside zinc, magnesium and our carefully selected botanical ingredients, vitamin B6 forms part of a comprehensive nutritional formula with clearly disclosed quantities and established nutrient functions.

The trace mineral Zinc is an important micronutrient that is essential for the maintenance of good health.  For example, adequate levels of Zinc are necessary for proper immune system function.

With a multitude of other physiological effects, Zinc also appears to be an important co-factor in sleep quality with emerging evidence consistently demonstrating that oral zinc supplementation may increase both the duration and the quality of sleep.

Essential Support for Muscle Function, Energy and Protein Synthesis

Test-FX® provides 429 mg of magnesium per five-capsule serving, supplied through the formula's ZMA® complex.

Magnesium is an essential mineral with several important physiological functions, particularly relevant to physically active adults.

It contributes to normal muscle function, normal energy-yielding metabolism and normal protein synthesis. Magnesium also contributes to the reduction of tiredness and fatigue and the normal functioning of the nervous system.

These well-established benefits make magnesium an important component of Test-FX®'s comprehensive approach to nutritional support for active men.

Selenium - Reproductive Health, Thyroid Function & Cellular Protection

Selenium is an essential trace mineral with important, scientifically established roles in men's health.

Test-FX® provides 55 µg of selenium per serving (100% NRV), contributing to normal spermatogenesis (sperm production), normal thyroid function and the protection of cells from oxidative stress.

Selenium also contributes to normal immune system function, making it an important nutrient for maintaining normal physiological health and function.

These are established, authorised nutritional benefits, not speculative claims about increasing testosterone production.

Testofen® - Standardised Fenugreek, Not Ordinary Seed Powder

Test-FX® provides 600 mg of Testofen® fenugreek seed extract per serving, standardised to deliver 300 mg of saponins.

Rather than relying on an unspecified quantity of generic fenugreek powder, we've selected a standardised botanical extract with clearly declared active constituents.

This commitment to ingredient quality, standardisation and transparency is central to the Test-FX® formula - so you know exactly what you're getting in every serving.

KSM-66 Ashwagandha is widely Known for its ability to support natural testosterone production. Its adaptogenic properties combat stress, helping to balance cortisol levels that can otherwise inhibit testosterone. Elevate not just your hormones, but your overall well-being with this evidence-backed, natural marvel.

Ginseng Korean Extract, a natural ally in promoting testosterone production. Its active compounds, like ginsenosides, foster enhanced blood flow, and surges in levels of key hormone-related enzymes which have been shown to induce the increased production of testosterone both in vivo and in vitro. By bolstering hormonal balance, this extract contributes to increased vitality and overall well-being. 

Grape Seed Extract - A Concentrated, Clearly Specified Botanical

Test-FX® contains 75 mg of concentrated grape seed extract, selected for its naturally occurring proanthocyanidins and polyphenols.

Grape seed is a rich botanical source of these plant compounds, making its extract specification an important consideration when comparing formulas.

As with every ingredient in Test-FX®, we disclose the amount provided rather than hiding it inside a proprietary blend.

Maca, a nutrient-rich root from the Andes of Peru, is known for its adaptogenic properties and is also celebrated for its prowess in kindling male energy and hormonal balance. Maca may also help maintain a balanced mood and promote a sense of well-being. Its rich profile of vitamins, minerals, and antioxidants contributes to general wellness.

Nettle Leaf Extract (Urtica dioica)

A Concentrated Botanical Extract, Not Just Ordinary Nettle Powder

Test-FX® provides 50 mg of concentrated 20:1 nettle leaf extract per serving, sourced from Urtica dioica and carefully selected as part of our comprehensive men's nutritional formula.

Unlike products that hide botanical ingredients inside proprietary blends, Test-FX® clearly declares the plant source, extraction ratio and quantity provided.

It's this attention to ingredient quality and transparency that sets Test-FX® apart. Every botanical has a clearly defined place in the formula, alongside essential nutrients such as zinc, which contributes to the maintenance of normal testosterone levels in the blood.

Built For Daily Drive DNA Lean Icon Serious Support For Serious Results DNA Lean Icon Formulated With Purpose DNA Lean Icon
DNA Lean Test-FX natural testosterone action shot

Why Test-FX® is Different

Most testosterone support formulas rely on over exaggerated claims, weak dosing, or overly complicated blends that may look impressive on the label but are under-dosed and under-deliver in real life.

After all you need the right balance between the number of ingredients and the amount of each ingredient.

Test-FX® was built differently. It combines carefully selected natural extracts, essential minerals, vitamin D3, K2, ZMA®, KSM-66® and Fenugreek extract in a full 5-capsule serving, allowing room for a more complete and optimally dosed formula.

No hidden blends. No over-inflated claims. No macho nonsense. Just a transparent, properly built men’s health formula designed to support healthy testosterone levels, energy, performance, drive and daily vitality.

DNA Lean®

Why Test-FX® Stands Out

Test-FX® was built for men who want serious testosterone support without hidden blends, stimulant-driven fake energy, or exaggerated macho marketing.
Built Around Proven Actives
A complete men’s health formula featuring KSM-66®, Fenugreek Extract, ZMA®, vitamin D3, K2 and carefully selected botanical extracts.
DNA Lean Test-FX natural testosterone support capsules angled product shot
No Stimulant-Driven Hype
Designed to support energy, drive, performance and daily vitality without relying on caffeine or stimulants to make you “feel” it.
Test-FX natural testosterone booster front label with transparent formula details
Optimally Dosed 5-Capsule Formula
No hidden blends, no over-inflated and underdosed ingredient list, and no nonsense - just a fully disclosed formula with room for effective ingredient levels.
Hand holding Test-FX capsules in front of DNA Lean testosterone support bottles

DNA Lean®

Frequently Asked Questions

This can vary significantly from product to product. Test-FX is designed to support stress, sleep, nutrient status and training recovery. Test-FX uses ingredients such as KSM-66® ashwagandha, fenugreek, ZMA, vitamin D3 and selenium to support male performance naturally. Well-documented human studies show these ingredients are most effective at supporting healthy testosterone in men.

Test-FX is not built on hype or mega-dose mystery blends. It combines branded, evidence-led ingredients with key minerals and vitamins linked to normal testosterone production, muscle function and wellbeing. In addition, every ingredient is effectively dosed, which is why each serving is 5 capsules.

Some men notice better drive, mood or training motivation within a few weeks, but the best results usually come from consistent daily use over 4–12 weeks. For example, Ashwagandha trials commonly run for around 8-12 weeks.

Yes - Test-FX® is formulated for daily use by adults when taken according to the product directions.

Each five-capsule serving provides clearly disclosed amounts of vitamins, minerals and botanical extracts, so you know exactly what you're taking.

As with any food supplement, individual suitability can vary. Do not exceed the recommended daily dose, and consult a qualified healthcare professional before use if you take medication, have an underlying medical condition or are unsure whether the formula is appropriate for you.

Check your combined nutrient intake before using Test-FX® alongside other vitamin or mineral supplements.

No. Test-FX is a natural testosterone support supplement using plant extracts, vitamins and minerals to support healthy male physiology.
  • 5 stars: 25 (93%)
  • 4 stars: 1 (4%)
  • 3 stars: 1 (4%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
I
Ian a.
Fantastic product felt a difference

Fantastic product felt a difference with in a week of taking them , would recommend

C
Carl K.
Game changer

Great for libido, mood and general well-being, definitely works

c
colin c.
Was ok

Was expecting alot better after hearing good reviews about this, especially for the price, it was OK but nothing special

M
Marc

Very good product

a
annette

These are great . Been using them for few months now. The design is not as bulky as the last. Better grip

N
Nicola J.
Fantastic

Fantastic

Hi Nicola, thank you so much for your awesome feedback - we appreciate it

a
annette

Amazing helps with your sleeping good value also

S
Steve P.
Test FX

Brilliant product. Have started these and already have felt improvements with my libido and general wellbeing after a long cycle. These are definitely worth buying if you are in need of a boost. Will buy and use again.

Dear Steve, thank you so much for your positive feedback. We delighted to hear your 5 star review and are extremely happy that you loved our products and service.

M
Malcolm P.
Test fx

Bang on product can’t fault it at all only been on them for three days and already feeling a difference within myself and also extremely excellent customer service from Mel

Dear Malcolm,

Thank you for leaving us a 5 star review. We really appreciate you sharing your experience with our products so that shoppers just like yourself can make better informed decisions.

R
Rodriguez
Rodriguez

Was recommended to me by a friend, this is goood!

Dear Rodriguez, Thank you so much for taking the time to leave a review. We are delighted to hear your that you are enjoying our products.

w
warren b.
All good

Have trouble taking 4 at once so take 2 a day and they work good

Thank you so much for taking the time to leave a review. We are delighted to hear your positive feedback and this goes a long way to help people such as yourself to make an informed decision about our products and service.

J
Jimmy
Nothing compares to Test-FX

While still in my 30's I have struggled with relatively low testosterone for at least 2 years and my GP can only offer Testosterone replacement, which is not something I want to do at this age. As a result I have experimented with lots of different natural testosterone boosting products, but Test-FX is hands down the best. My energy levels are great, I am sleeping better and and performing much better on the Rugby field. Test fx is now my goto supplement.

Dear Jimmy, thank you for taking the time out to leave us your feedback. We are delighted to hear your awesome results from Test-FX!

K
Kane
The best I have ever used

Before taking Test fx I suffered from low testosterone, felt very lethargic, had a low libido, and generally felt like I needed a boost. Having tried many various products over the course of the last 12 months, I was left feeling skepitical as none of them really worked. However since using test fx I am feeling incredible, my energy levels are brilliant, my libido has increased and my latest blood test from medi checks shows that my testosterone level is back in range. I cannot recommend this product enough.

Hi Kane, thank you for taking the time out to leave us your feedback. We really appreciate this and are delighted to see you rated us 5 stars!

A
Andrew R.
I've been using this product

I've been using this product for nearly 2 weeks and am already noticing a different with energy and lythargy, and they seem to be helping my sleep patterns which helps with work and the old sex drive is picking back up which keeps the missus happy :wink:

Hi Andrew, thank you for taking the time out to leave us your feedback. We really appreciate this and are delighted to see you rated us 5 stars!

N
Nicky C.
Absolutely brilliant stuff, it might

Absolutely brilliant stuff, it might be in my head but I feel much fresher, more alert and on my toes.

Thank you for taking the time out to leave us your feedback. We really appreciate this and are delighted to see you rated us 5 stars!

D
Dean P.
Excellent

Been using these Test fx for two weeks now and starting to see and feel Excellent results.My strength has increased and I'm also a little leaner.Will be buying more very soon And Also very fast delivery.

Thank you for taking the time out to leave us your feedback. We really appreciate this and are delighted to see you rated us 5 stars!

A
Ajmal
Definately boosts testosterone

I recently received an email from dna lean requesting my feedback, so here it is: I'm an athlete and as part of my training, at least once per year I get a blood test done to check up on my health. Over the last 24 months or so I'd noticed that my testosterone level had started to decline, not only did I notice a drop in my energy levels, but my recovery wasn't quite optimal. Unfortunately my blood tests also confirmed the same; testosterone was low. Since taking Test-fx I feel fantastic, both my energy and recovery is back to what it was 2 years ago. My most recent blood test has also come back good showing that my testosterone has been boosted and is in the high range. Test-fx is an Absolute rock solid supplement!

S
Steve H.
On the comeback trail

I have used these before and was always really happy with the results but since lockdown happened I confess to doing nothing but sitting on my backside. My energy and motivation levels were rock bottom, but at nearly 53 it was either, get on with it or vegitate. Muscle memory and Test-FX in equal measures and a few weeks on and I'm buzzing, really motivated, focused and back at it. And it's not just in the gym where I'm feeling the benefits __

S
Steve Hall
On the comeback trail

I have used these before and was always really happy with the results but since lockdown happened I confess to doing nothing but sitting on my backside. My energy and motivation levels were rock bottom, but at nearly 53 it was either, get on with it or vegitate. Muscle memory and Test-FX in equal measures and a few weeks on and I'm buzzing, really motivated, focused and back at it. And it's not just in the gym where I'm feeling the benefits 😉

A
Ajmal Shahzad
Definately boosts testosterone

I recently received an email from dna lean requesting my feedback, so here it is: I'm an athlete and as part of my training, at least once per year I get a blood test done to check up on my health. Over the last 24 months or so I'd noticed that my testosterone level had started to decline, not only did I notice a drop in my energy levels, but my recovery wasn't quite optimal. Unfortunately my blood tests also confirmed the same; testosterone was low. Since taking Test-fx I feel fantastic, both my energy and recovery is back to what it was 2 years ago. My most recent blood test has also come back good showing that my testosterone has been boosted and is in the high range. Test-fx is an Absolute rock solid supplement!

A
Achilles the trojan
The best I have used

Before taking Test-FX I was suffering from poor sleep, low-libido, and my weights sessions had seemingly become a little lacklustre. What I found appealing about this product was that the description wasn’t filled with the usual marketing nonsense, rather, it was refreshingly honest. So anyway, despite being sceptical, I decided to buy. I am now on my 3rd tub, honestly this is the best supplement I have used! After 3 weeks my libido started to normalise again, I was sleeping a solid 7 hours, and I felt alive and kicking! Right now my bench press is also up by 9 kilos and I could not ask for more. I highly recommend test fx.

J
Jeremy
Awesome

Been using Test FX for a while now and it gives me a good boost. Stronger, fitter, better mood - it's really worked for me.

A
Achilles
The best I have used

Before taking Test-FX I was suffering from poor sleep, low-libido, and my weights sessions had seemingly become a little lacklustre. What I found appealing about this product was that the description wasn't filled with the usual marketing nonsense, rather, it was refreshingly honest. So anyway, despite being sceptical, I decided to buy. I am now on my 3rd tub, honestly this is the best supplement I have used! After 3 weeks my libido started to normalise again, I was sleeping a solid 7 hours, and I felt alive and kicking! Right now my bench press is also up by 9 kilos and I could not ask for more. I highly recommend test fx.

A
Ajmal
Definately boosts testosterone

I recently received an email from dna lean requesting my feedback, so here it is: I'm an athlete and as part of my training, at least once per year I get a blood test done to check up on my health. Over the last 24 months or so I'd noticed that my testosterone level had started to decline, not only did I notice a drop in my energy levels, but my recovery wasn't quite optimal. Unfortunately my blood tests also confirmed the same; testosterone was low. Since taking Test-fx I feel fantastic, both my energy and recovery is back to what it was 2 years ago. My most recent blood test has also come back good showing that my testosterone has been boosted and is in the high range. Test-fx is an Absolute rock solid supplement!

S
Steve H.
On the comeback trail

I have used these before and was always really happy with the results but since lockdown happened I confess to doing nothing but sitting on my backside. My energy and motivation levels were rock bottom, but at nearly 53 it was either, get on with it or vegitate. Muscle memory and Test-FX in equal measures and a few weeks on and I'm buzzing, really motivated, focused and back at it. And it's not just in the gym where I'm feeling the benefits __

J
John B.
Extra energy

I've gave these tablets ago in a bid to give myself that little but extra boost since suffering major trauma in a bike accident.it's been great being able just to have that bit more spring in my step and added energy on top of all the meds I have too take will definitely be buying again.

Hi John,

Thank you for taking the time out to leave us your feedback. We really appreciate this and are delighted to see you rated us 5 stars!

J
Jeremy Young
Awesome

Been using Test FX for a while now and it gives me a good boost. Stronger, fitter, better mood - it's really worked for me.