The science behind Skin Hydration Shield

Help your skin from the inside out.

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Four Ingredients Working Together

Skin Hydration Shield: The Science

You already put time and effort into caring for your skin. A supplement should give you a clear reason to add another step.

Skin Hydration Shield brings hydration and barrier support from the inside out, reaching parts of your skin that your topicals can't.


The research below concerns ingredients, not the finished Skin Hydration Shield formula.

Moisture retention starts here.

40 mg CeraLOK® per daily serving

A randomized, double-blind, placebo-controlled trial studied 44 Japanese women with dry skin. The active group took 40 mg of CeraLOK† for 12 weeks.

Cheek moisture loss was lower than placebo at weeks four and twelve. The twelve-week result was the study's primary outcome. Lip moisture was also higher than placebo at week twelve.[1]

What this supports:

  • CeraLOK rice ceramides help support the skin's moisture barrier.
  • CeraLOK helps reduce moisture loss from facial skin.
  • CeraLOK supports hydrated skin from within.

Hydration and fine-line support, backed by human research.

120 mg hyaluronic acid per daily serving

Hyaluronic acid packs a punch for skin hydration and the appearance of fine lines.

In one trial, 120 mg daily improved facial hydration and a photographic wrinkle score more than placebo at eight and twelve weeks. These results compared percentage changes from starting values. Facial water loss was also lower than placebo at twelve weeks.[6]

A second trial tested 120 mg at 300 kDa, matching our daily dose and average molecular weight. At eight weeks, the change in one crow's-feet wrinkle-volume measure favored HA over placebo.[5]

Both trials used Hyabest (S) LF-P at 120 mg daily. Our generic HA supplies the same daily dose. Its 300 kDa average matches the approximate mean reported in Oe's trial.

A larger trial adds broader HA support. It randomized 150 adults to 60 mg, 120 mg, or placebo. The twelve-week trial found higher facial hydration, lower water loss, and less wrinkle depth than placebo at 120 mg daily. It used 1,800 kDa HA, compared with our 300 kDa average.[7]

Together, these findings explain why we chose HA for hydration and fine-line support.

What this supports:

  • Hyaluronic acid helps support skin hydration and moisture.
  • Hyaluronic acid helps support skin barrier function by helping reduce transepidermal water loss.
  • Hyaluronic acid helps reduce the appearance of fine lines and wrinkles.

Hydration and smoother texture, studied at 1,000 mg.

1,000 mg MSM per daily serving

In a sixteen-week study, 32 women took 1,000 mg of OptiMSM daily. Experts rated their skin texture as smoother at four weeks. Measured hydration increased at eight weeks. Both remained improved at sixteen weeks, compared with starting values.

26 of 32 participants agreed or strongly agreed that their skin felt more hydrated at sixteen weeks.

This was a questionnaire result from the 1,000 mg group. The study used OptiMSM, a branded form of high-purity MSM; Roral uses a different high-purity MSM ingredient at the same 1,000 mg daily amount. This portion of the study did not include a placebo group.[8]

These findings support our choice of 1,000 mg for hydration and texture.

What this supports:

  • MSM helps support skin hydration.
  • MSM helps support smoother skin texture.

Support for your skin's normal collagen formation.

120 mg vitamin C per daily serving

Vitamin C supports normal collagen formation and helps protect cells from oxidative stress. Skin Hydration Shield supplies 120 mg daily.[9][10]

We include vitamin C for normal collagen formation and antioxidant support. The antioxidant study by Lauer measured a biological response, not visible skin improvement.[13]

What this supports:

  • Vitamin C supports your skin's normal collagen formation.
  • Vitamin C helps protect cells from oxidative stress.

What ingredient studies found over time

These are a summary study findings, not a direct forecast for your skin! Stay disciplined to give Skin Hydration Shield the best shot of helping YOUR skin.

Two weeks: early hydration observations

Some groups taking 100 or 200 mg of HA had higher hydration than at baseline. [12] Keep the habit, your skin my take more time to show results! Good things take time!

Four weeks: moisture retention and smoother texture

The matched ceramide ingredient, taken at 40 mg daily, produced lower cheek water loss than placebo.[1] In the MSM study, experts rated texture as smoother than at the start. At 1,000 mg daily, 22 of 32 participants also agreed or strongly agreed that their skin felt smoother and less rough. [8]

Six weeks: more moisture in the HA group

At 120 mg daily, the 300 kDa HA group had higher measured skin moisture than at baseline, though not statistically significant at this point. [4]

Eight weeks: hydration and fine-line findings

The 120 mg, 300 kDa HA group had a favorable change in one crow's-feet wrinkle-volume measure versus placebo.[5] Another 120 mg HA trial found a greater percentage increase in facial hydration than placebo at this visit. This study used Hyabest with a molecular weight between 200-600 kDa.[6] Measured hydration also increased from starting values in the 1,000 mg OptiMSM group.[8]

Twelve weeks: moisture retention and selected wrinkle findings

One HA trial found higher facial hydration and lower facial water loss than placebo at 120 mg daily. The ceramide trial found lower cheek water loss and higher lip moisture at 40 mg daily.[6][1] Photo analysis also found narrower crow's-feet wrinkles than at baseline in the 1,000 mg OptiMSM group, though expert wrinkle grading did not show a significant change at this dose.[8]

Sixteen weeks: hydration and texture findings in the MSM study

Hydration and expert-rated texture remained improved from starting values in the 1,000 mg OptiMSM group. Image-measured wrinkle width also remained lower, although expert wrinkle grading did not show a significant change. This dose study had no placebo group.[8]

One row per research report, limitations included

The evidence behind each ingredient

See what was tested, how it compares with our formula, and what the researchers found.

Each row summarizes a human research report, including an observational dietary study. The MSM report contains two study parts. None tested the finished Skin Hydration Shield formula.

Ingredient Material vs. our formula Daily amount Participants Design Length What was measured Reported result Limitations Source
CeraLOK® rice ceramides Same. Matched ingredient and daily amount: the study used the same branded extract CeraLOK† at 40 mg daily. 40 mg/day (formula: 40 mg) 44 women randomized; 43 in later analyses. Randomized, double-blind, placebo-controlled 12 weeks Cheek moisture loss (TEWL, primary outcome); lip moisture; wrinkles, texture, elasticity, pigmentation, pores, and water loss at other sites Cheek water loss was lower than placebo at weeks four and twelve. Lip moisture was higher at week twelve. The twelve-week cheek result was the primary outcome; the other listed findings were secondary. The trial did not establish wrinkle, texture, or elasticity benefits. Secondary findings were not adjusted for multiple comparisons. The study had supplier funding and supplier-affiliated authors. Takara et al. (2021)
Hyaluronic acid Close match. The 300 kDa arm used the same daily amount and average molecular weight as our formula: 120 mg/day at 300 kDa. The study used branded Hyaluronsan HA-F/Hyabest®; Roral uses generic 300 kDa hyaluronic acid. 120 mg/day (formula: 120 mg) 61 women, aged 35-60, with dry skin Randomized, double-blind, placebo-controlled 6 weeks, plus a measurement 2 weeks after intake ended Stratum-corneum moisture; dry-skin condition The 300 kDa group showed increased skin moisture during the six-week study. Two weeks after they stopped taking HA, their average skin-moisture score was 33.9, compared with 24.16 for placebo. Both groups had started at almost exactly the same level (21.20 vs. 21.18). At this final measurement, the difference between the groups was statistically significant. Several authors were affiliated with the company that made the HA used in the study. During the six weeks of HA use, skin moisture improved from where participants started, but the difference compared with placebo was not statistically significant. The significant difference between the 300 kDa group and placebo appeared two weeks after HA use ended. Kawada et al. (2015)
Hyaluronic acid Comparable. The 300 kDa arm matches the formula's daily amount and average molecular weight; a separate arm used 2 kDa. The study used Hyabest®. Our formula uses unbranded HA. 120 mg/day (formula: 120 mg) 60 randomized; 50 included in wrinkle-replica analysis, including 16 in the 300 kDa group. Randomized, double-blind, placebo-controlled 12 weeks Crow's-feet wrinkle measures (image analysis of skin replicas) After eight weeks, the 300 kDa HA group showed a statistically significant improvement in measured crow’s-feet wrinkle volume compared with placebo (p=0.046). The significant result applied to one wrinkle measure at eight weeks, but not at twelve weeks. The 300 kDa group included 16 people in the wrinkle analysis. The ingredient maker funded the study and employed several authors. Oe et al. (2017)
Hyaluronic acid Same daily amount: 120 mg. The study used Hyabest® (S) LF-P; our formula uses unbranded hyaluronic acid. 120 mg/day (formula: 120 mg) 40 adults Randomized, double-blind, placebo-controlled 12 weeks Facial hydration; facial moisture loss (TEWL); wrinkle assessment; firmness and elasticity indices After 12 weeks, participants taking hyaluronic acid had better facial hydration and less moisture loss than those taking placebo. Selected wrinkle measurements also improved compared with placebo. Small study: 20 participants per group. Three authors worked for the ingredient manufacturer. Firmness and elasticity results were mixed. Hsu et al. (2021)
Hyaluronic acid Comparable. Same daily amount; different molecular weight. The study used 1,800 kDa sodium hyaluronate. Our HA averages 300 kDa. This provides supporting evidence for oral HA. 60 or 120 mg/day (formula: 120 mg) 150 randomized; 147 in the primary analysis Randomized, double-blind, placebo-controlled 12 weeks Facial hydration; moisture loss (TEWL); periorbital wrinkle depth; elasticity and firmness At 120 mg: improved facial hydration, reduced facial moisture loss, and reduced periorbital wrinkle depth versus placebo. Selected forehead elasticity measures declined less than placebo over 12 weeks. Selected firmness measures improved versus placebo. Funded and conducted by the ingredient manufacturer. Many secondary outcomes were tested without a multiplicity correction. One elasticity index (R2) showed no consistent benefit. Dolečková et al. (2026)
Hyaluronic acid (context) The study used 300 kDa hyaluronic acid, matching our formula’s approximate molecular weight. Our formula provides 120 mg daily; this study tested 100 and 200 mg. 100 or 200 mg/day (formula: 120 mg) 129 women Randomized, double-blind, placebo-controlled 12 weeks Skin hydration Skin hydration improved from starting levels in both younger and older women taking hyaluronic acid, with improvements appearing as early as two weeks in some groups. Timing varied by dose and skin type. The reported hydration comparisons were against starting levels, so they do not establish superiority over placebo. Subgroups were small, and a COVID-19 outbreak may have affected later results. Gao et al. (2023)
MSM The study used OptiMSM®, a branded high-purity MSM. We use high-purity MSM from a different brand. Our 1,000 mg daily serving matches the study’s lower dose. 1,000 or 3,000 mg/day (formula: 1,000 mg) 20 in the pilot study; 63 in the dose-comparison study, including 32 taking 1,000 mg daily. A double-blind, placebo-controlled pilot, followed by a study comparing two daily doses. In the pilot, neither participants nor researchers evaluating their skin knew who received MSM or placebo. Up to 16 weeks Expert-graded wrinkles, texture, firmness, elasticity, and radiance; wrinkle width from photographs; instrument-measured hydration, firmness, and elasticity At 1,000 mg daily, skin hydration improved by week eight and remained improved through week sixteen. Experts also rated skin as smoother, more radiant, firmer, and more elastic. Photo analysis found narrower wrinkles at weeks twelve and sixteen. These improvements were compared with starting values. Instrument-measured firmness did not improve significantly. The 1,000 mg group had no placebo comparison, so improvements cannot be confidently attributed to MSM alone. The placebo-controlled pilot used 3,000 mg daily. Muizzuddin & Benjamin (2022)
Vitamin C The study examined vitamin C from food. Our formula provides 120 mg per serving; this supplement dose was not tested. Dietary intake, no fixed dose (formula: 120 mg) 4,025 women ages 40–74 Cross-sectional analysis (NHANES I) Single time point Dermatologist assessments of wrinkled appearance, age-related dryness, and skin thinning. Women who consumed more vitamin C from food were less likely to have a wrinkled appearance and age-related dryness. These links remained after researchers accounted for age, sun exposure, and other factors. This observational study found a link, but cannot establish cause and effect. Vitamin C intake was estimated from a single day’s food recall. Cosgrove et al. (2007)
Vitamin C Our dose is 120mg. The study used calcium ascorbate, our product uses USP grade ascorbic acid. 100 or 180 mg daily of Vitamin C as calcium ascorbate 33 adults; 11 per group Placebo-controlled; two calcium-ascorbate groups and a placebo group 4 weeks Skin antioxidant activity: how quickly the skin neutralized an applied test radical. After four weeks, measured skin antioxidant activity increased 22% in the lower-dose group and 37% in the higher-dose group compared with starting values. Both groups improved significantly more than placebo. This small, four-week study measured antioxidant activity in the skin. It did not measure changes in skin hydration, wrinkles, or appearance. Lauer et al. (2013)

The evidence does not establish proven synergy, a clinical trial of the finished formula, or a personal results date. The studies above support specific ingredients, doses, and endpoints.

It does not make Skin Hydration Shield a replacement for moisturizer, sunscreen, medical care, or a balanced diet.

Fine print is where weak claims go to hide. The line is staying up here.

References

  1. Takara T, et al. (2021). "Oryza Ceramide®, a Rice-Derived Extract Consisting of Glucosylceramides and β-Sitosterol Glucoside, Improves Facial Skin Dehydration in Japanese Subjects." Functional Foods in Health and Disease, 11(8), 385–407. Randomized, double-blind, placebo-controlled trial; 44 women randomized, 43 in later analyses.View study →
  2. Takeda S, et al. (2023). "Comparative Study on Epidermal Moisturizing Effects and Hydration Mechanisms of Rice-Derived Glucosylceramides and Ceramides." International Journal of Molecular Sciences, 24(1), 83. Reconstructed-human-epidermis model.View study →
  3. Takeda S, et al. (2021). "β-Sitosterol 3-O-D-Glucoside Increases Ceramide Levels in the Stratum Corneum via Up-Regulated Expression of Ceramide Synthase-3 and Glucosylceramide Synthase in a Reconstructed Human Epidermal Keratinization Model." PLOS ONE, 16(3), e0248150. Reconstructed-human-epidermis model.View study →
  4. Kawada C, et al. (2015). "Ingestion of Hyaluronans (Molecular Weights 800k and 300k) Improves Dry Skin Conditions." Journal of Clinical Biochemistry and Nutrition, 56(1), 66–73. Randomized, double-blind, placebo-controlled trial.View study →
  5. Oe M, et al. (2017). "Oral Hyaluronan Relieves Wrinkles: A Double-Blinded, Placebo-Controlled Study Over a 12-Week Period." Clinical, Cosmetic and Investigational Dermatology, 10, 267–273. Randomized, double-blind, placebo-controlled trial.View study →
  6. Hsu T-F, et al. (2021). "Oral Hyaluronan Relieves Wrinkles and Improves Dry Skin." Nutrients, 13(7), 2220. Randomized, double-blind, placebo-controlled trial, n=40.View study →
  7. Dolečková I, et al. (2026). "Oral Sodium Hyaluronate Improves Skin Hydration, Barrier Function and Signs of Aging: A Randomized, Double-Blind, Placebo-Controlled Trial in 150 Healthy Adults." Scientific Reports, 16, 2941. First published online 20 December 2025. doi:10.1038/s41598-025-32758-5. Randomized, double-blind, placebo-controlled trial, n=150; 1,800 kDa sodium hyaluronate.View study →
  8. Muizzuddin N and Benjamin R (2022). "Beauty from Within: Oral Administration of a Sulfur-Containing Supplement Methylsulfonylmethane Improves Signs of Skin Ageing." International Journal for Vitamin and Nutrition Research, 92(3–4), 182–191. Pilot randomized trial and dose-response study.View study →
  9. Pullar JM, Carr AC, and Vissers MCM (2017). "The Roles of Vitamin C in Skin Health." Nutrients, 9(8), 866. Review.View study →
  10. European Commission (2012). Commission Regulation (EU) No 432/2012. Official Journal of the European Union, L136, 1–40. Authorized vitamin C health claims.View study →
  11. Cosgrove MC, et al. (2007). "Dietary Nutrient Intakes and Skin-Aging Appearance Among Middle-Aged American Women." American Journal of Clinical Nutrition, 86(4), 1225–1231. Cross-sectional analysis, n=4,025.View study →
  12. Gao Y, et al. (2023). "Oral Administration of Hyaluronic Acid to Improve Skin Conditions via a Randomized Double-Blind Clinical Test." Skin Research and Technology, 29, e13531. Randomized, double-blind, placebo-controlled trial over 12 weeks; 129 women reported; 100 or 200 mg/day of 300 kDa hyaluronic acid.View study →
  13. Lauer AC, Groth N, Haag SF, Darvin ME, Lademann J, Meinke MC (2013). "Dose-Dependent Vitamin C Uptake and Radical Scavenging Activity in Human Skin Measured with in vivo Electron Paramagnetic Resonance Spectroscopy." Skin Pharmacology and Physiology, 26(3), 147–154. Placebo-controlled four-week study; 33 adults, 11 per group.View study →