Hair Growth & Strength
What feeds the follicle.
Hair quality reflects nutrient status. Iron, biotin, vitamin C, sea moss minerals, plus topical care — together, over months, they change the texture of growth.
Ingredients that support this
Products for Hair Growth & Strength
EVIDENCE
The studies behind this
Hair-specific peer-reviewed trials are sparse for our ingredient set. The most defensible adjacent evidence is on micronutrient sufficiency (vitamin C for collagen, hyaluronic acid for scalp environment).
What the studies say
Vitamin C is one of the few supplements with a Cochrane-level review on its most-claimed use. The honest reading is: it does not prevent the common cold in the general population, but it modestly shortens duration and is more useful under physical stress.
Honest caveatDaily prophylactic dosing in healthy adults gives small benefit. Therapeutic dosing started AT symptom onset shows little effect in most trials.
- 01META-ANALYSIS
Vitamin C for preventing and treating the common cold
Hemilä H, Chalker E · Cochrane Database of Systematic Reviews · 2013
“Regular vitamin C supplementation did not reduce cold incidence in the general population but consistently reduced cold duration and severity, with larger effects in people exposed to short periods of extreme physical stress.”
Plain EnglishCochrane: vitamin C doesn't prevent colds in healthy adults but shortens them; bigger effect in athletes and high-stress populations.
- 02PEER-REVIEWED REVIEW
Vitamin C, respiratory infections and the immune system
Carr AC, Maggini S · Trends in Immunology / PMC · 2017
“Vitamin C contributes to immune defence by supporting various cellular functions of both the innate and adaptive immune systems.”
Plain EnglishVitamin C is required by multiple immune-cell functions; deficiency impairs both innate and adaptive immunity.
All citations link to PubMed, PubMed Central or the original publisher. We do not reproduce full study text. References last verified by SACRAHAUS editorial.
What the studies say
Oral hyaluronic acid has emerged from a curiosity to a moderately well-evidenced ingredient for skin hydration, elasticity and wrinkle depth — multiple recent randomised trials now show measurable improvement against placebo.
Honest caveatEffect sizes are real but modest; HA supplementation is best understood as a maintenance ingredient, not a corrective one.
- 01RCT
Oral administration of hyaluronic acid to improve skin conditions via a randomised double-blind clinical test
Gao Y-R, Wang R-P, et al. · Skin Research and Technology · 2023
“Oral hyaluronic acid significantly improved skin moisture, elasticity and wrinkle scores compared with placebo over the trial period.”
Plain EnglishPlacebo-controlled trial: oral HA improved measured skin hydration, elasticity and wrinkle depth.
- 02RCT
Oral intake of a new full-spectrum hyaluronan improves skin profilometry and ageing: a randomised, double-blind, placebo-controlled clinical trial
Various · European Journal of Dermatology · 2021
“Oral full-spectrum hyaluronan improved skin profilometry parameters associated with ageing compared with placebo.”
Plain EnglishRCT: oral full-spectrum HA improved instrumented skin-ageing measures versus placebo.
- 03RCT
Oral Hyaluronic Acid Supplement: Efficacy in Skin Hydration, Elasticity, and Wrinkle Depth Reduction
Various · PubMed-indexed · 2025
“Oral HA supplementation produced statistically significant improvements in skin hydration, elasticity and wrinkle depth compared with placebo.”
Plain EnglishMost recent RCT replicates hydration, elasticity and wrinkle-depth improvements.
All citations link to PubMed, PubMed Central or the original publisher. We do not reproduce full study text. References last verified by SACRAHAUS editorial.
Questions
- When will I see hair changes?
- Hair grows slowly. Three to six months of consistency is the realistic window for visible change.