Foundation 02
Why we picked these ingredients.
Every hair-care brand has an ingredient story. Most of them stretch the science to make their formula sound revolutionary. Here is what we actually know, and where the limits are.
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Rosemary leaf extract
Rosemary leaf extract supports scalp microcirculation. That mechanism, better blood flow at the follicle bed, meaning more oxygen and nutrient delivery to the cells doing the work, is one of the few in hair-care that has consistent peer-reviewed literature behind it.
The strongest data we have on rosemary in humans is a 2015 randomized controlled trial of 100 adults with thinning. After six months of daily topical use, participants showed measurable improvement in hair count. The study had limitations: a single site, n=100, and it has not been independently replicated at scale. We are not citing it as proof. We are citing it as the reason rosemary earned its place in our serum and oil.
One trial does not settle a question. It opens one.
*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.*
Panahi et al., 2015. SkinMed Journal, 13(1):15-21. Single-site randomized trial; one of several rosemary studies referenced in our formulation review.
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Ginger root
The data on ginger is thinner. Mechanism studies show gingerol has anti-inflammatory effects and modulates pathways involved in follicle inflammation, but most of the work is in vitro or in animal models. Human data is limited.
We include it because chronic low-grade scalp inflammation is a real factor in thinning, and gingerol is a well-tolerated, well-studied anti-inflammatory across other contexts. The risk of including it is low. The upside is real if it does what the mechanism studies suggest.
Mao et al., 2019. Foods Journal.
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Biotin (vitamin B7)
Biotin is a cofactor in keratin synthesis. It is the building-block argument: keratin is what hair, skin, and nails are made of, and biotin is what your body uses to make keratin. If you are deficient, supplementation matters. If you are not deficient, the marginal benefit is much smaller.
Most adults eating a varied diet are not biotin-deficient. So why include it? Because the cost of supplementation at 5000 mcg is low, the safety profile is excellent, and a meaningful number of women experiencing diffuse thinning have suboptimal biotin status that they did not know about.
One caveat: high-dose biotin can interfere with certain lab tests, including thyroid panels and troponin. If you are getting blood work done, tell your doctor.
Patel et al., 2017. Skin Appendage Disorders.
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Zinc, iron, vitamin D
These three minerals show up consistently in the literature on hair loss. Low ferritin (iron storage) correlates with diffuse thinning, especially in women and athletes. Zinc plays a role in follicle cycling. Vitamin D receptors live on the follicle itself, and adequate vitamin D status correlates with healthier follicle output.
We include all three at evidence-based doses, not megadoses. The goal is to make sure your follicle is not running on empty if your diet is short of any of these. It is not to flood your system.
Trost et al., 2006. Park et al., 2009. Daroach et al., 2018.
