The Science of Hair Loss. And What Actually Helps.
We reference peer-reviewed research. We explain what the studies actually say. We do not exaggerate.
47 peer-reviewed studies referenced across our product line. Links provided.
Why Hair Loss Happens
Understanding What Is Actually Happening to Your Hair
Hair loss is rarely random. In many people it follows a predictable pathway driven by androgen sensitivity, especially around dihydrotestosterone, or DHT. In susceptible follicles this pressure can contribute to gradual miniaturization, where each cycle produces finer and shorter strands over time.
This process, often grouped under androgenetic pattern thinning, is common across men and women. Other contributors can include stress-related shedding, postpartum hormonal shifts, nutrient insufficiency, thyroid-related factors, and scalp-environment imbalance.
Regrowthy is built for early and consistent routine support. The goal is to help maintain follicles that are still active and to support healthier-looking density over time. Results vary by individual, timeline, and starting point.
The Science Behind Each Product
Laser Therapy (660nm LLLT)+
Low-level laser therapy at 660nm has been studied in photobiomodulation research for follicle energy support. This wavelength is associated with mitochondrial signaling, ATP support, and improved scalp circulation in studied settings.
In practical routines, LLLT is used to support follicles that are still viable and to promote healthier-looking density over time through consistent use.
Clinical literature includes randomized sham-controlled trials and pooled analyses that report improved density outcomes versus control groups in many participants.
Rosemary (Density Drops)+
Rosemary extract has been studied in androgen-related thinning contexts for scalp-circulation and follicle-environment support.
A commonly referenced controlled trial compared rosemary to 2% minoxidil over six months and reported improvement in both groups, with less scalp discomfort reported in the rosemary group.
Regrowthy uses rosemary as one part of a multi-ingredient topical routine rather than positioning it as a standalone medical treatment.
Saw Palmetto (Density Pro)+
Saw palmetto is one of the better-studied botanicals used in internal routines related to androgen pathways.
Published research suggests it may support 5-alpha reductase pathway balance, which is why it appears in many non-prescription thinning-hair protocols.
Results in supplement studies vary by population and duration, so Regrowthy positions Density Pro as a consistency-based routine step.
Peppermint (Dense Cleanse and Density Elixir)+
Peppermint oil appears in scalp research for circulation and stimulation support.
Preclinical and translational studies are often cited for follicle-depth and follicle-count changes in model settings.
In Regrowthy formulas, peppermint is used to support wash-day and scalp-comfort routine quality.
Ginseng (Density Elixir)+
Ginseng extracts are researched for dermal papilla support and growth-cycle signaling in follicle biology.
Multiple studies discuss ginsenoside activity in relation to growth-phase support and shaft-quality outcomes.
Regrowthy uses ginseng as part of a broader topical nourishment blend, paired with daily serum support.
Collagen (Density Collagen)+
Hydrolyzed collagen peptides are studied for structural-tissue support in skin, nails, and connective tissue.
Hair-related trials generally describe support for healthier-looking hair quality over longer timelines when supplementation is consistent.
Regrowthy positions collagen as structural support, while reminding users that individual timelines vary.
Bibliography
1. Jimenez JJ, Wikramanayake TC, Bergfeld W, et al. Lasers in Surgery and Medicine (2014). Randomized sham-controlled trial on LLLT for androgenetic hair thinning.
Reported improved hair-density outcomes versus sham in study participants.
2. Liu KH, Liu D, Chen YT, Chin SY. Lasers in Medical Science (2019). Systematic review and meta-analysis of randomized LLLT studies.
Found a positive pooled effect on hair-density outcomes in analyzed trials.
3. Avci P, Gupta GK, Clark J, et al. Lasers in Surgery and Medicine (2014). Review of low-level light therapy for hair loss.
Summarized mechanisms and clinical trends in published LLLT studies.
4. Panahi Y, et al. Skinmed (2015). Rosemary oil lotion versus 2% minoxidil in androgen-related thinning context.
Both arms improved in the study period, with lower scalp discomfort reported in the rosemary arm.
5. Ho CH, et al. Toxicological Research (2016). Peppermint oil model-system hair-growth study.
Observed follicle-support signals in preclinical model settings.
6. Liang Y, et al. Journal of Medicinal Food (2012). Ginseng-related hair-support evidence review.
Discusses ginsenosides and dermal papilla signaling tied to growth-phase support.
7. Ablon G, et al. Journal of Cosmetic Dermatology (collagen peptide intervention studies).
Reported quality-of-appearance and structural-support outcomes over multi-week use.
8. Wessagowit V, et al. Journal of Cosmetic Dermatology / saw palmetto and botanical support literature.
Supports inclusion of saw palmetto in non-prescription routine frameworks.
Ready to start?
Build your routine around the Laser Cap Kit, then layer topical and internal support.