Can a serum plus a red light cap regrow hair?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteriaz: * Female participants aged 35 to 55 years, inclusive. * Clinically diagnosed with androgenic alopecia. * Fitzpatrick Skin Types I-VI. * Willingness to undergo baseline laboratory screening, including CBC, TSH, iron/TIBC, 25-hydroxyvitamin D, ferritin, free testosterone, total testosterone, estradiol (E2), and FSH, to confirm eligibility and stratification status. * Generally healthy individuals with no significant dermatological conditions affecting the scalp, such as eczema, psoriasis, or folliculitis, that could interfere with treatment assessment. * Willingness to maintain a consistent hair care routine and refrain from new hair treatments, supplements, or grooming practices that could confound study results. * Willingness and ability to provide recent laboratory results to establish baseline metabolic parameters. * Participants must have a smartphone or tablet that operates on iOS version 11.0 or higher and/or Android 9.0 or higher, access to the Apple App Store or Google Play to download the REVIAN app, and internet or wireless network connectivity. * Commitment to avoid hair dryer use for at least 48 hours before and after each office visit. * Commitment to avoid hair extensions for at least 6 months prior to and throughout the study duration. * Ability and willingness to adhere to the study protocol, including scheduled visits and assessments. * Willingness to allow trichoscopic and photographic documentation of the scalp and hair. * Ability and willingness to provide written informed consent after being fully informed about the study's nature, purpose, procedures, potential risks, and benefits. Exclusion Criteria: * Presence of autoimmune or pathologic causes of hair loss, such as alopecia areata or lichen planus. * Active scalp disorders or infections, such as eczema, psoriasis, seborrheic dermatitis, or folliculitis. * Clinically significant abnormalities in baseline screening labs, including CBC, TSH, iron/TIBC, 25-hydroxyvitamin D, ferritin, free testosterone, total testosterone, E2, and FSH, that fall outside satisfactory ranges for hair growth or indicate an underlying medical pathology, such as iron deficiency anemia or thyroid dysfunction. * History of hypersensitivity to any components of KeraFactor scalp-stimulating solution. * Presence of a medical condition that makes the skin sensitive to sun or light, or use of photosensitizing medications, shampoos, lotions, or other therapies that sensitize the skin to light. * Medical conditions or medications known to significantly affect hair growth, including uncontrolled thyroid disorders, anemia, cancer, chemotherapy, spironolactone, 5-alpha-reductase inhibitors, or cyproterone. * Active use of GLP-1 receptor agonists, such as Ozempic, Wegovy, Mounjaro, Zepbound, or similar medications. * Active use of topical treatments for hair regrowth, such as minoxidil or finasteride. * Pregnant, breastfeeding, or planning to become pregnant during the study. * Unrealistic expectations or psychological conditions that may impact study compliance or satisfaction. * Continual use of red-light or low-level laser therapy outside of study requirements. * Recent initiation of topical hair regrowth treatments, such as minoxidil or finasteride. * Continual use of minoxidil, finasteride, or other hair regrowth treatments. * Any active cancer or cancer diagnosis. * Active smoking habit. * History of hair transplant procedures. * Significant scalp scarring or structural anomalies in treatment zones. * Recent major surgeries or medical interventions within the last 3 months. * History of prolonged or repeated mechanical tension on the hair or scalp, such as tight hairstyles contributing to traction alopecia.