Thyroid Hair Density OilFollicle Support Treatment for Shedding & Thinning 2 oz
$34.99
- Repair Thyroid-Damaged Follicles: Uses 38% Pumpkin Seed Oil and Argan Oil to help repair roots that have become weak, thin, and brittle due to low thyroid levels.*
- Stop the Shedding Cycle: Rosemary and Castor Oils block shedding triggers, keeping your hair on your head instead of in the brush or shower drain.*
- Wake Up Dormant Roots: Targets follicles stuck in the resting stage, signaling sleeping roots to wake up and enter the growth phase again.*
- Target the 3 Causes of Hair Loss: A unique 7-oil blend that addresses hormonal triggers, poor circulation, and nutrient depletion to help fix a widening part and thinning edges.*
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Formulated by Thyroid Expert Dr. Westin Childs
Noticed a Decline in Hair Quality, Texture & Density Since Your Diagnosis?
You’re not imagining it. Thyroid disease traps your hair in the shedding phase[9][11] while simultaneously triggering hormonal imbalances that lead to difficult-to-treat thinning.[10]
Thyroid medications don’t address this, which is why your hair stays brittle and damaged even with normal labs.
But Thyroid Hair Density Oil does.
I loaded it with 7 clinically-backed plant-based oils designed to nourish damaged follicles, stop excessive shedding, and wake up your roots in the resting phase.
Research-Backed Ingredients
Pumpkin Seed Oil 38%
Pumpkin seed oil is one of the most studied plant-based ingredients for hair density.[1] It contains beta-sitosterol, a natural compound that helps inhibit 5-alpha reductase, the enzyme behind the type of thinning common in thyroid patients with hormone shifts. We made it the largest ingredient in this formula at 38% for that reason.
Rosemary Oil 2%
Rosemary oil is one of the only plant-based ingredients with clinical trial data showing it can rival prescription topical treatments for hair density.[2][3] It works by improving scalp circulation and supporting follicle activity, a natural fit for thyroid patients dealing with sluggish hair recovery. Even at 2%, it punches well above its weight.
Castor Oil 22%
Castor oil contains ricinoleic acid, a fatty acid that supports a healthy scalp environment, locks in moisture, and helps protect the hair shaft from breakage. For thyroid patients whose hair has become dry, brittle, and prone to snapping, castor oil is one of the most effective scalp conditioners available.
Argan Oil 10%
Argan oil is naturally rich in vitamin E, oleic acid, and antioxidants that nourish the hair shaft, restore shine, and help repair the damage done by years of thyroid-related hair fragility.[6] It softens dry, damaged hair without weighing it down or making the scalp feel greasy.
Quality Sourcing
100% Active Oils, No Fillers
Every drop in the bottle is a working ingredient. No water, no carrier dilution, no synthetic fragrance. Just seven oils chosen for what they do for thyroid hair.
100% Plant-Based Formula
Every ingredient is plant-derived. No animal byproducts, no shark-derived squalane, no synthetic actives. Pure botanical oils your scalp recognizes and absorbs.
No Silicones, Sulfates, or Parabens
Free from the additives that build up on the scalp, irritate the follicle, and disrupt hormone balance. Nothing in this formula competes with what your hair is trying to do.
Naturally Preserved with Vitamin E
Vitamin E (tocopherol) acts as a natural antioxidant preservative, keeping the formula stable and shelf-safe without synthetic stabilizers like phenoxyethanol or BHT.
Pumpkin Seed Oil 38%
Pumpkin seed oil is the headliner of this formula at 38%, and there’s a reason it gets the largest share.
Thyroid disease often shifts the balance of androgens in your body, which can convert into DHT (dihydrotestosterone). DHT is the hormone that miniaturizes hair follicles and drives the slow thinning at the part line and crown known as androgenetic alopecia.[10]
Pumpkin seed oil contains high concentrations of beta-sitosterol and other phytosterols that help inhibit 5-alpha reductase, the enzyme that converts testosterone into DHT.[1]
In a randomized clinical trial, pumpkin seed oil produced a measurable increase in hair count compared to placebo over 24 weeks.[1] When applied topically as part of a complete formula, it delivers these compounds directly to the scalp where they’re needed most.
Castor Oil 22%
Castor oil has been used as a hair and scalp treatment for centuries, and modern cosmetic chemistry helps explain why.
It’s roughly 90% ricinoleic acid, an unusual fatty acid that locks in moisture, supports a healthy scalp barrier, and helps protect hair from breakage.
For thyroid patients, this matters. Hypothyroidism slows the production of natural scalp oils, which leaves the scalp dry, the hair shaft brittle, and the follicle environment compromised. Castor oil restores some of what the thyroid has stopped producing.
It’s also viscous enough to coat the hair shaft and lock in the lighter, more bioactive ingredients in this formula so they have time to work.
Jojoba Oil 18%
Jojoba is technically a liquid wax, not an oil, and that’s exactly why it works so well on the scalp.
Its molecular structure is nearly identical to sebum, the natural oil your scalp produces.[5] When you apply jojoba topically, your scalp recognizes it and absorbs it without flagging it as foreign. That means it sinks in instead of sitting on top.
For thyroid patients whose oil production has stalled, jojoba steps in to balance the scalp without clogging follicles or making hair feel greasy. It also helps the heavier oils in this formula spread evenly across the scalp.
Argan Oil 10%
Argan oil is one of the most concentrated natural sources of vitamin E and oleic acid available.[6]
What that means for thyroid hair: vitamin E protects the hair shaft from oxidative damage, the kind of slow degradation that’s amplified in thyroid patients.[8] Oleic acid moisturizes from within the cuticle rather than just coating the outside.
The result is hair that looks shinier, feels softer, and reflects light better, all of which contribute to the appearance of fullness and density even before the underlying follicle has fully recovered.
Squalane 9%
Squalane is one of the most underrated ingredients in scalp care.
Your body produces squalene naturally as part of healthy sebum, but production drops with age, stress, and (notably) with hypothyroidism. Squalane is the hydrogenated, shelf-stable form of squalene, and it slips into your scalp’s natural lipid barrier without disruption.
What it does: it deeply hydrates without clogging follicles, supports the scalp’s natural moisture barrier, and helps the other oils in this formula penetrate where they need to go.
Our squalane is plant-derived from olives or sugarcane. No shark byproducts, ever.
Rosemary Oil 2%
Rosemary oil is the only botanical with clinical trial data showing it can match the performance of 2% topical minoxidil over six months.[2]
Why? Two mechanisms.
First, rosemary improves microcirculation in the scalp, which means more oxygen and nutrients reaching the hair follicle.[3] For thyroid patients with already-sluggish scalp circulation, this is critical.
Second, rosemary supports follicle activity at the cellular level and has been used successfully in aromatherapy trials for hair density.[4]
The 2% concentration is intentional. Higher than that and rosemary becomes irritating to sensitive scalps. At 2%, it’s the dose used in published research.
Vitamin E Oil 1%
Vitamin E plays a dual role in this formula.
First, it’s the natural antioxidant preservative that keeps the rest of the formula stable. Without it, oils oxidize, lose potency, and develop off-smells. Vitamin E prevents that.
Second, vitamin E itself is one of the most-studied nutrients for hair density. A clinical trial of tocotrienol (a form of vitamin E) found a measurable increase in hair count in volunteers with hair loss.[7]
Topically, it neutralizes the oxidative damage that breaks down hair structure and accelerates the appearance of thinning, especially relevant for thyroid patients whose hair is already under stress.[8]
Simple To Use
How to use for
Thyroid Hair Density
Apply 5 to 10 drops directly to the scalp 2 to 3 times per week, focusing on areas of thinning. Massage gently with fingertips for 1 to 2 minutes to support circulation. Leave on for at least 30 minutes (or overnight) before washing out with shampoo. For best results, pair with Thyroid Hair Regrowth Complex daily.
Complete the Thyroid Hair System
Thyroid hair damage happens at multiple levels: internal, scalp, follicle, and cellular. Each product in the Thyroid Hair System targets a different one. Used together, they form a complete protocol for thyroid patients serious about restoring hair density.
Thyroid Hair Regrowth Complex
The internal foundation. Targets the nutrient and hormone causes of thyroid hair loss from within.
Thyroid Hair Density Oil
The scalp nourisher. Restores moisture, supports density, and protects the hair shaft. (You’re here.)
This Page
Thyroid Hair Activator Serum
The follicle activator. Water-soluble peptides and caffeine to wake up tired follicles at the source.
Coming Soon
Thyro Hair Light
The cellular energizer. Red light therapy device targeting follicle ATP production at the deepest layer.
Coming Soon
See How Thyroid Hair Density Oil Compares
Frequently Asked Questions
How do I apply Thyroid Hair Density Oil?
Apply 5 to 10 drops directly to the scalp, focusing on areas of thinning, then massage gently with your fingertips for 1 to 2 minutes. Leave on for at least 30 minutes before washing out with shampoo.
For best results, use it as an overnight treatment 2 to 3 times per week. The longer it sits, the more time the active oils have to work.
Can I use this with my thyroid medication?
Yes, always. This is a topical product applied to the scalp, not something you take by mouth, so there’s no interaction with thyroid medication of any kind: levothyroxine, Synthroid, NDT, T3, or compounded formulas.
How long until I see results?
Hair grows on a long timeline, and any topical product takes patience to evaluate.
Most users notice changes in scalp comfort, hair softness, and shine within the first few weeks. Visible changes in fullness and density typically require 12 weeks of consistent use, with the most noticeable improvements showing up between months 3 and 6.
Stick with it. Hair regrowth and density improvements are slow but real.
Will it make my hair greasy?
Not if you use it correctly. This is a treatment oil designed to be applied to the scalp, left on for 30 minutes to overnight, and then washed out with shampoo.
It’s not a leave-in product. The combination of jojoba and squalane in the formula is intentionally chosen to be lightweight and non-comedogenic, but the heavier oils (castor, pumpkin seed) will leave residue that needs to be washed out.
Will it work for telogen effluvium (sudden shedding)?
Telogen effluvium is the most common form of thyroid-related hair loss, and yes, this oil is designed with it in mind.[11]
Telogen effluvium happens when stress on the body (including thyroid dysfunction) pushes a large number of hair follicles into the resting and shedding phase prematurely.[12]
Topical oils support the recovery process by improving scalp circulation, reducing follicle inflammation, and protecting the hair shaft while new growth comes in. For best results, combine this oil with internal support from Thyroid Hair Regrowth Complex.
Will it work for androgenetic alopecia (pattern thinning)?
Yes. The 38% pumpkin seed oil and 2% rosemary oil in this formula were both selected for their evidence in supporting hair density in patients with androgenetic alopecia.[1][2]
Pumpkin seed oil supports DHT balance at the follicle, and rosemary oil supports scalp circulation and follicle activity. Both mechanisms target the underlying drivers of pattern thinning.
Can I use it on color-treated hair?
Yes. The formula is free of sulfates, silicones, and harsh additives that strip color. The oils actually help condition color-treated hair and support the cuticle so color lasts longer.
Is it safe during pregnancy or breastfeeding?
The ingredients in this formula are widely considered safe for topical use during pregnancy and breastfeeding, but rosemary essential oil is sometimes flagged for caution in early pregnancy.
If you are pregnant or breastfeeding, please check with your OB or healthcare provider before starting any new topical product, including this one.
Can I use this with the Thyroid Hair Regrowth Complex capsule?
Yes, and that’s the recommended pairing. The capsule addresses internal causes of thyroid hair loss (nutrient deficiencies, hormone shifts, follicle stress signals from within), and the oil addresses external ones (scalp environment, follicle support at the surface, hair shaft protection).
Used together, you’re attacking the problem from both sides.
What does it smell like?
Lightly herbaceous from the rosemary oil, with the natural earthy note of pumpkin seed and the soft scent of argan. There’s no synthetic fragrance added. Most users find the scent pleasant and not overpowering.
Will it stain my pillowcase if I use it overnight?
The oil is light gold to amber in color and can transfer to fabric. If you use it as an overnight treatment, we recommend using an old pillowcase, a hair towel, or a satin scarf to protect your bedding.
How is this different from a generic rosemary or castor oil?
A generic single-oil product gives you one mechanism. This formula gives you seven, each chosen for a different aspect of how thyroid disease damages hair.
You’re getting DHT support (pumpkin seed), circulation (rosemary), scalp barrier (castor), oil balance (jojoba), shaft repair (argan), lipid restoration (squalane), and antioxidant protection (vitamin E) in one bottle, at clinically meaningful concentrations.
It’s also formulated specifically for the thyroid patient population, which no generic oil on the market is.
How does shipping work?
All domestic orders receive free shipping regardless of price. Orders are typically processed within 1 business day, are shipped out via USPS Ground Advantage, and typically arrive within 1-3 business days.
We also offer international shipping to most countries! International orders ship free if the order value is greater than $250 USD. Otherwise, the price of shipping is calculated on the checkout page. We primarily use USPS for international shipments.
What is your return/refund policy?
All of my products come with a 60-day money-back guarantee. I’m confident that my products will work for you but, in case they don’t, for whatever reason, you can return them for a full refund within 60 days. It makes purchasing them a no-brainer!
You can find more information about our return and refund policy by clicking here.
What if I have other questions?
Don’t hesitate to reach out! Please email us at hello@restartmed.com, and we will do our best to get back to you within a day or so! You can also call us here: (480) 331-9431.
Used by over 100,000 people who have left over 15,000 reviews
Ingredients That Work
Ingredients and dosages are thoughtfully chosen, relentlessly tested, and continually refined.
Physician Formulated
All formulas have been created by Dr. Westin Childs based on his clinical experience and evaluation of peer-reviewed scientific research.
Made in the USA
Our supplements are proudly made in the USA, with globally sourced ingredients, in an FDA-registered, NSF-certified GMP facility, and shipped from Mesa, Arizona.
Third-Party Tested
Every single supplement lot is third-party tested for heavy metals, microbes, mold, and contaminants by an ISO-accredited lab testing facility.
Free Domestic Shipping
Every order (regardless of price) placed in the U.S.A. will ship free with USPS.
60-Day Money Back Guarantee
If you don’t love your supplements, then you can return them for a full refund! No questions asked and no hoops to jump through.
Scientific References
View All References
1. Cho, Y.H., et al. (2014). Effect of pumpkin seed oil on hair growth in men with androgenetic alopecia: a randomized, double-blind, placebo-controlled trial. Evidence-Based Complementary and Alternative Medicine. doi:10.1155/2014/549721.
2. Panahi, Y., et al. (2015). Rosemary oil vs minoxidil 2% for the treatment of androgenetic alopecia: a randomized comparative trial. Skinmed.
3. Murata, K., et al. (2013). Promotion of hair growth by Rosmarinus officinalis leaf extract. Phytotherapy Research. doi:10.1002/ptr.4712.
4. Hay, I.C., Jamieson, M., & Ormerod, A.D. (1998). Randomized trial of aromatherapy: successful treatment for alopecia areata. Archives of Dermatology. doi:10.1001/archderm.134.11.1349.
5. Pazyar, N., et al. (2013). Jojoba in dermatology: a succinct review. Giornale Italiano di Dermatologia e Venereologia.
6. Boucetta, K.Q., et al. (2015). The effect of dietary and/or cosmetic argan oil on postmenopausal skin elasticity. Clinical Interventions in Aging. doi:10.2147/CIA.S71684.
7. Beoy, L.A., Woei, W.J., & Hay, Y.K. (2010). Effects of tocotrienol supplementation on hair growth in human volunteers. Tropical Life Sciences Research.
8. Trüeb, R.M. (2009). Oxidative stress in ageing of hair. International Journal of Trichology. doi:10.4103/0974-7753.51923.
9. Vincent, M., & Yogiraj, K. (2013). A descriptive study of alopecia patterns and their relation to thyroid dysfunction. International Journal of Trichology. doi:10.4103/0974-7753.114714.
10. Contreras-Jurado, C., et al. (2015). Thyroid hormone signaling controls hair follicle stem cell function. Molecular Biology of the Cell. doi:10.1091/mbc.E14-07-1251.
11. Headington, J.T. (1993). Telogen effluvium. New concepts and review. Archives of Dermatology. doi:10.1001/archderm.1993.01680240096017.
12. Malkud, S. (2015). Telogen effluvium: a review. Journal of Clinical and Diagnostic Research. doi:10.7860/JCDR/2015/15219.6492.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
**Results may vary.
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