When Did You Last Feel Fully Switched On?
Your thyroid helps set the pace of your energy and metabolism — so when things run low, you tend to feel it everywhere.
Six Working Together
Selenium sits at the centre, supported by zinc, two B-vitamins and two amino acids.
Why Selenium Is Pivotal
Most of what the thyroid releases is T4 — a storage form. Your body converts it into active T3 using selenium-dependent enzymes.
Those enzymes (deiodinases) rely on selenium — which contributes to normal thyroid function and to the protection of cells from oxidative stress.
See the science →Plenty Of Selenium, Well Within Safe Limits
Each serving gives 100µg as L-selenomethionine — above the daily reference, yet only a third of the upper safe limit.
We Left Iodine Out
Iodine is easy to overdo, and most UK diets already provide it — so we focused on selenium instead.
What You're Really Comparing
When a thyroid supplement competes on price, something has to give — usually several things at once.
Just Two A Day
Two capsules with food and water deliver your full blend of six active ingredients — that's it.
Everything You Want. Nothing You Don't.
A focused thyroid-support formula in a clean capsule — nothing it doesn't need.
Why Subscribe?
Up to 35% off, plus rewards with every order.
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Try It For 120 Days
- ★ 2.1M+ servings sold
- ★ Manufactured in the UK, GMP-tested
- ★ 120-day money-back guarantee
Support Normal Thyroid Function With Thyrox®
30 Days Supply · 60 Capsules · Iodine-Free, With Selenium For Normal Thyroid Function
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- Up To 35% Off — the more you commit, the more you save
- Cancel, Pause or Delay — anytime, no commitment
- Loyalty Rewards — gifts and credits with every order
- Format: Capsules · 2 per serving
- Selenium: 100µg (182% NRV), L-selenomethionine
- Zinc: 10mg (100% NRV), zinc bisglycinate
- Vitamin B6: 2mg (143% NRV), as P-5-P
- Vitamin B12: 250µg, as methylcobalamin
- Also includes: L-Tyrosine 600mg & Myo-Inositol 600mg
- Servings Per Container: 30 (60 capsules)
- Capsule: 100% vegetable cellulose (HPMC)
- Iodine-free — no fillers or binders
- Suitable for: Vegans & Vegetarians
- Dispatch: 1 working day
- UK Standard Delivery: 2–4 working days
- UK Express Delivery: 1–2 working days
We Know How You Feel
- You put everyone else's needs above your own
- You have a duty and there's no down time
- You're always keeping the peace but adding stress
- You feel responsible for the feelings of everyone else
Here's the truth
Most Thyroid support supplements don't contain enough — or miss important compounds entirely.
Thyrox™ vs. The Rest
Tap any feature to see why it matters.
Why Iodine Free?
Thyrox™ is formulated without added iodine to offer greater flexibility in managing overall iodine intake — while focusing on targeted micronutrients like selenium, which directly contributes to normal thyroid function.
Thyrox™ Proudly Supports
*Selenium contributes to normal thyroid function. Vitamin B6 and B12 contribute to normal energy metabolism and the reduction of tiredness and fatigue. Zinc contributes to normal immune function.
The Science
Learn about Thyroid Support
We’ve broken down the research, the dosing and what to expect, in plain English.
Explore the Thyroid Support scienceTrusted by Thousands
Loved by Element 5 Customers
Rachel
Ian
James
Natalie
Lena
"As a busy mum over 30 I was on a look out for something that actually works. My energy was always low and I was getting unwell ALOT! I've been taking element 5 NMN for over 6 months now and the energy I feel is amazing!"
Rachel
Verified buyer
"Been on Element 5 NMN for about 18 months now and honestly? It's been a game-changer for my training. Running and gym work just feel easier to recover from. I don't get that wiped-out feeling for days anymore."
Ian
Verified buyer
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Why Subscribe?
Health optimisation is built on consistency, not one off use.
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"Our happiest customers have been subscribed for over 6 months, if you ever stop, you will understand exactly why they stay."
Transparent Lab Testing
Every batch of Thyrox is independently tested before it reaches you. We publish every result so you can see exactly what's in every capsule.
Reports shown are for Batch E5-14335. As new batches are produced and independently tested, these reports will be updated to reflect the most current results.
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Join thousands choosing cleaner, healthier nutrition daily.
I've noticed I'm less fatigued in the day and don't have that 'mummy brain fog' as much. Putting it down to NMN and Eternal Resveratrol.
I've noticed my days are longer, sleep is shorter but I somehow feel more energised and focused.
I've been taking Element 5 NMN for over 6 months now and the energy I feel is amazing. It haf to be worth trying.
I was waiting for Element 5 to bring this out and couldn't be happier — stocked up ready to go.
Awesome quality, top service, great brand. Why would you shop anywhere else.
Been on Element 5 NMN for about 18 months. It's been a game-changer for my training. Running and gym work just feel easier to recover from.
Frequently Asked Questions
Thyrox™ is an iodine-free micronutrient and amino acid supplement formulated around nutrients involved in normal thyroid function and energy metabolism. It combines selenium, L-tyrosine, myo-inositol, zinc, vitamin B6 and vitamin B12 in considered daily doses.
Thyrox™ is a food supplement and not a medication. If you are taking prescription medication, including thyroid medications, please consult your healthcare professional before starting any new supplement.
Thyrox™ is a food supplement formulated around nutrients involved in normal thyroid function and energy metabolism. It is not intended to diagnose, treat or manage any medical condition.
The formula includes selenium, which contributes to normal thyroid function, alongside other micronutrients involved in normal physiological processes. If you have a diagnosed thyroid condition, including hypothyroidism or Hashimoto’s, or are taking medication, please consult your healthcare professional before taking any supplement.
The recommended intake is 2 capsules per day with water, preferably with food. Do not exceed the recommended daily serving. Always follow the directions of a healthcare professional if you are taking medication or under clinical supervision.
Iodine is an essential nutrient found in many foods. Intake can vary depending on diet and lifestyle, so this formula is designed without added iodine to give individuals greater flexibility in managing their overall nutrient intake while focusing on the targeted nutrients in Thyrox™.
Thyrox™ provides:
- Selenium, which contributes to normal thyroid function and cell protection from oxidative stress
- L-Tyrosine, an amino acid used in the production of certain compounds including thyroid hormones
- Myo-Inositol, involved in intracellular signalling pathways
- Zinc, which contributes to macronutrient metabolism and normal cognitive function
- Vitamin B6 & B12, which contribute to normal energy metabolism and the reduction of tiredness and fatigue.
Thyrox™ can be taken at any time of day, but many people find taking it with breakfast or lunch helps integrate it into their routine. Always take it with water and preferably with food to support digestion. If you are taking medication or other supplements, consult your healthcare professional to ensure appropriate timing and compatibility.
Yes, in general Thyrox™ can be taken alongside other basic vitamins and minerals from a balanced diet. If you are taking additional supplements or have a specific health regimen, consult your healthcare professional to ensure compatibility.
Yes - Thyrox™ is suitable for vegans and vegetarians. The capsule shell is made from HPMC (hydroxypropyl methylcellulose), a plant-based material, and all ingredients are selected to meet vegan standards.
Thyrox™ is formulated without common allergens such as gluten and dairy. Check the label for full ingredient details.
Review Disclaimer
The reviews shared above reflect the personal opinions of Element 5 customers. These testimonials should not be considered medical advice of health claims.