Dopamine
Thyroid Support

TyroPhen

$22.00 USD

Dopamine & Thyroid Support

Description

TyroPhen combines high-purity L-Tyrosine and DL-Phenylalanine, amino acid precursors involved in dopamine and thyroid hormone production. A clean, filler-free formula designed to support motivation, focus, metabolism, and energy.

Quantity / Bottle

1 Bottle90 day supply$22.00 USD
Save 5%2 Pack180 day supply$41.80 USD
Save 10%3 Pack270 day supply$59.40 USD

Product variants

Purchase options

Select the frequency:

Save 10% on every subscription
Free shipping in US & Canada over $100
Cancel/Pause any time

You can't add more TyroPhen in 1 to cart

Dopamine synthesis*
Thyroid hormone production support*
Improved motivation*
Improved focus*
Attention deficit assistance*
Regulation of reward-seeking behavior*
May assist with addiction-alleviation*
Aids melanin production*
Adrenal support*
Prolactin lowering*
Serotonin lowering*

*These Statements have not been evaluated by the Food and Drug Association, or Health Canada. These products are not meant to diagnose, treat, cure, or prevent any diseases.

Each bottle contains: 90 capsules
Servings per container: 90

Each capsule contains:
L-Tyrosine: 225mg
DL-Phenylalanine: 225mg

Other ingredients: gelatin (bovine)

Take 1 capsule daily, with or without food, during daylight hours. Best taken before spending time outdoors in natural light for dopamine activation.

1. Coull JT, Hwang HJ, Leyton M, Dagher A. Dopamine precursor depletion impairs timing in healthy volunteers by attenuating activity in putamen and supplementary motor area. J Neurosci. 2012 Nov 21;32(47):16704-15. doi: 10.1523/JNEUROSCI.1258-12.2012. PMID: 23175824; PMCID: PMC6621775.

2. During MJ, Acworth IN, Wurtman RJ. Phenylalanine administration influences dopamine release in the rat's corpus striatum. Neurosci Lett. 1988 Oct 31;93(1):91-5. doi: 10.1016/0304-3940(88)90018-3. PMID: 3211373.

3. Roiser JP, McLean A, Ogilvie AD, Blackwell AD, Bamber DJ, Goodyer I, Jones PB, Sahakian BJ. The subjective and cognitive effects of acute phenylalanine and tyrosine depletion in patients recovered from depression. Neuropsychopharmacology. 2005 Apr;30(4):775-85. doi: 10.1038/sj.npp.1300659. PMID: 15688090; PMCID: PMC2631648.

4. Hardman CA, Herbert VM, Brunstrom JM, Munafò MR, Rogers PJ. Dopamine and food reward: effects of acute tyrosine/phenylalanine depletion on appetite. Physiol Behav. 2012 Mar 20;105(5):1202-7. doi: 10.1016/j.physbeh.2011.12.022. Epub 2011 Dec 30. PMID: 22230253.

5. Hitsman B, MacKillop J, Lingford-Hughes A, Williams TM, Ahmad F, Adams S, Nutt DJ, Munafò MR. Effects of acute tyrosine/phenylalanine depletion on the selective processing of smoking-related cues and the relative value of cigarettes in smokers. Psychopharmacology (Berl). 2008 Mar;196(4):611-21. doi: 10.1007/s00213-007-0995-5. Epub 2007 Nov 25. PMID: 18038222.

6. Lou HC. Dopamine precursors and brain function in phenylalanine hydroxylase deficiency. Acta Paediatr Suppl. 1994 Dec;407:86-8. doi: 10.1111/j.1651-2227.1994.tb13461.x. PMID: 7766968.

7. Fernstrom JD, Fernstrom MH. Tyrosine, phenylalanine, and catecholamine synthesis and function in the brain. J Nutr. 2007 Jun;137(6 Suppl 1):1539S-1547S; discussion 1548S. doi: 10.1093/jn/137.6.1539S. PMID: 17513421.

8. Riley PA. Melanin. Int J Biochem Cell Biol. 1997 Nov;29(11):1235-9. doi: 10.1016/s1357-2725(97)00013-7. PMID: 9451820.

9. Iuvone PM. Regulation of retinal dopamine biosynthesis and tyrosine hydroxylase activity by light. Fed Proc. 1984 Sep;43(12):2709-13. PMID: 6147273.

10. Elkin RG, Featherston WR, Rogler JC. Effects of dietary phenylalanine and tyrosine on circulating thyroid hormone levels and growth in the chick. J Nutr. 1980 Jan;110(1):130-8. doi: 10.1093/jn/110.1.130. PMID: 7354377.

11. H.L. Wang, V.H. Harwalkar, H.A. Waisman, Effect of dietary phenylalanine and tryptophan on brain serotonin, Archives of Biochemistry and Biophysics, Volume 97, Issue 1, 1962, Pages 181-184, ISSN 0003-9861, https://doi.org/10.1016/0003 9861(62)90062-0.

TyroPhen

Main Benefits

Dopamine, thyroid, and motivation — from the ground up.

More motivation & drive

Directly supplies the amino acid precursors the brain uses to synthesise dopamine — the neurotransmitter of drive, reward, and focus.

Better thyroid function

Thyroid hormone is made from iodine and tyrosine — TyroPhen supplies the amino acid substrate the thyroid depends on.

Lower excess serotonin

DL-Phenylalanine — not tyrosine alone — reduces excess serotonin in the brain and body for better mood and metabolic balance.

Works with sunlight

Natural light catalyses tyrosine's conversion to dopamine — take TyroPhen before sun exposure for a synergistic effect.

The Problem

Low dopamine and poor thyroid function share the same root cause.

When the diet is low in tyrosine and phenylalanine, both the dopamine pathway and thyroid hormone synthesis are limited at the most fundamental level. The result shows up as low motivation, poor focus, sluggish metabolism, and mood dysregulation.

TyroPhen addresses this directly — supplying L-Tyrosine and DL-Phenylalanine to fuel the dopamine and thyroid pathways from their shared amino acid root.

✓Precursor to dopamine & catecholamines

✓Supports thyroid hormone (T3 & T4) synthesis

✓Reduces excess serotonin via phenylalanine

✓Supports melanin production & photoprotection

The Science

Why your body needs TyroPhen.

01 · The Backstory

Two amino acids. Two of the most important pathways in the body.

L-Tyrosine and DL-Phenylalanine are both precursors to dopamine and thyroid hormone — two systems that govern motivation, metabolism, focus, and mood. The pathways are direct:

Thyroid: Iodine + Tyrosine → T1 & T2 → T4 & T3
Dopamine: Phenylalanine → Tyrosine → L-Dopa → Dopamine

Supplying both amino acids ensures the body has immediate Tyrosine available — plus Phenylalanine as a reserve to synthesise more as needed.

02 · The Dopamine Story

Dopamine isn't just about reward — it's about regulation.

Dopamine governs more than excitement. It also determines whether we feel over-stimulated, compulsively drawn to things that don't serve us, or able to find satisfaction in ordinary life.

Clinical researchers study this by temporarily depleting tyrosine and phenylalanine in test subjects. In these depleted states, participants showed faster reaction times and notably less inclination toward addictive behaviours like smoking — suggesting balanced dopamine function is about calibration, not just stimulation.

03 · Tyrosine, Melanin & Light

Tyrosine is a light-absorbing amino acid.

Tyrosine is a critical component of melanin — the pigment in hair, skin, and eyes. The enzyme tyrosinase converts tyrosine into melanin as its first and rate-limiting step.

Natural light exposure also promotes the conversion of tyrosine into dopamine — which is why TyroPhen is best taken before time spent outdoors. Sunlight and this formula work in tandem.

04 · Why Both Matter

Phenylalanine does something Tyrosine can't.

Tyrosine is non-essential — the body can make it, but only by converting Phenylalanine, which is essential and must come from the diet. Consuming both ensures the body has direct Tyrosine available while replenishing the precursor reserve.

There's another reason Phenylalanine specifically matters: research shows that dietary Phenylalanine — not Tyrosine — is the form that can lower serotonin in the body and brain. For those familiar with the work of Dr. Ray Peat on the downstream effects of excess serotonin, this distinction is significant.

Our TyroPhen

L-Tyrosine + DL-Phenylalanine — immediate supply and precursor reserve
Phenylalanine lowers excess serotonin — tyrosine alone cannot
99%+ pure, filler-free, bovine gelatin capsule
3rd-party tested for bacteria, mold, and heavy metals

Other Tyrosine

Tyrosine only — no phenylalanine reserve or serotonin modulation
No awareness of the sunlight synergy or thyroid connection
Fillers and lower purity grades
No third-party contaminant testing

Add To Cart

› Why include phenylalanine if the goal is tyrosine?

Phenylalanine is an essential amino acid the body cannot make, and is the precursor to tyrosine. Supplying both ensures immediate tyrosine availability and a reserve of building blocks to make more. Additionally, phenylalanine specifically has been shown to lower brain serotonin, which tyrosine alone does not.

› How does tyrosine support thyroid function?

Thyroid hormone is literally made from iodine and tyrosine. Iodine attaches to tyrosine to form T1 and T2, which then combine to make T3 and T4. Without adequate tyrosine, thyroid hormone production is limited at the most basic level.

› Why is it recommended to take TyroPhen before going outside?

Natural light exposure catalyzes the conversion of tyrosine into dopamine. Taking TyroPhen before sunlight maximizes this pathway, offering a natural, synergistic dopamine boost.

› What does tyrosine have to do with hair and skin color?

Tyrosine is the precursor to melanin, the pigment responsible for hair, skin, and eye color. The enzyme tyrosinase converts tyrosine into melanin — making tyrosine a literal building block of your body's light-absorbing pigments.