Supplements for stronger nails and hair? new study investigates

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

INCLUSION CRITERIA: 1. Healthy female and male adults who are 18 to 75 years of age (inclusive) 2. Display longitudinal (vertical) nail ridges in the absence of other nail abnormalities 3. No cosmetic nail treatments that would mask the natural appearance of the nail plate in the past 6 months (i.e., manicure procedures that smooth the nail surface, nail polish) 4. In good general health (no uncontrolled diseases or conditions) as deemed by the investigator and is able to consume the study product 5. Individuals with childbearing potential must agree to practice an acceptable form of birth control for a certain timeframe prior to the first dose of study product and throughout the study, including: 1. use for at least 3 months prior to the first dose of study product: hormonal contraceptives including oral contraceptives, hormone birth control patch (e.g., Ortho Evra), vaginal contra-ceptive ring (e.g., NuvaRing), injectable contraceptives (e.g., Depo-Provera, Lunelle), or hormone implant (e.g., Norplant System), or intrauterine devices (e.g., Mirena); or 2. use for at least 1 month prior to the first dose of study product: double-barrier method, non-hormonal intrauterine devices (i.e., copper), or complete abstinence from sexual inter-course that may result in pregnancy; or 3. vasectomy of partner at least 6 months prior to the first dose of study product Individuals with the potential to impregnate others must agree to use condoms or other acceptable methods to prevent pregnancy throughout the study. Complete abstinence from sexual intercourse that may result in pregnancy is also acceptable. 6. Agree to refrain from treatments listed in Section 8.3 in the defined timeframe 7. Have maintained stable dietary habits (including supplement intake), exercise habits and lifestyle for the last 3 months prior to screening and agree to maintain dietary and exercise habits and lifestyle throughout the study 8. Willing and able to agree to the requirements and restrictions of this study, be willing to give volun-tary consent, be able to understand and read the questionnaire, and carry out all study-related pro-cedures EXCLUSION CRITERIA: 1. Individuals who are lactating, pregnant or planning to become pregnant during the study as con-firmed at the baseline visit (Visit 2) 2. Individuals who have applied cosmetic/topical treatments to fingernails in the past 6 months (i.e., manicures with nail plate filing, nail polish) 3. Individuals who display nail abnormalities indicative of a health condition affecting nail appearance or have been diagnosed with a disease affecting nails (i.e., thickening, discoloration, horizontal nail ridges \[Beau's lines\]) 4. Individuals with active nail biting (onychophagia) or other behaviors that may affect nail integrity 5. Have a known sensitivity, intolerability, or allergy to any of the study products or their excipients 6. Currently has COVID-19 or tests positive for COVID-19 within 28 days prior to baseline visit 7. Individuals opposed to consuming animal products 8. Have a history of uncontrolled hypertension (140/90 or greater mmHg), kidney dysfunction or dis-ease (dialysis or renal failure), hepatic impairment or disease 9. Individuals who lack the capacity to provide informed consent, as determined by the study team based on cognitive impairment, altered mental status, or inability to understand the study and make an informed decision