Benefits
Skin hydration measured with a corneometer
In wheat extract trials, 350 mg/day for 3 months raised arm and leg hydration versus placebo in 51 women with dry skin, and two later wheat lipid trials in women reported higher facial or body hydration within 2 to 12 weeks. A 2022 pooled analysis of 7 single-ingredient ceramide trials, not all from plants, found a modest gain over placebo, with large differences between studies and sources.
Lower water loss through the skin barrier
Transepidermal water loss measures how much water escapes through the skin. Pooled ceramide trials showed lower values than placebo. Konjac glucosylceramide in 100 adults with higher baseline water loss, and ceramides from wine lees (a yeast and grape residue) in 29 adults, lowered it by 12 weeks, though skin hydration did not change in the wine-lees trial.
Smoother skin texture in women with dry or aging skin
In two placebo-controlled trials of different wheat lipid products in women aged 45 to 60 or with dry, wrinkled skin, roughness scores improved within 8 weeks, and in one of them as early as 14 days. Both were small and had authors from ingredient companies, and in one the gains faded within 8 weeks of stopping.
Wrinkle scores in middle-aged women
In 64 women aged 45 to 60, wheat extract oil polar lipids lowered the crow's feet wrinkle grade more than placebo, reaching a drop of about one grade by 12 weeks; a second wheat trial in 72 women reported less wrinkle depth. A third trial combined wheat oil extract with hyaluronic acid, so its wrinkle result cannot be credited to ceramides alone.
Less visible skin dryness and redness
In 51 healthy adults (40 completed), a konjac extract giving 5 mg glucosylceramides a day for 6 weeks lowered the overall dermatologist skin score more than placebo. Dryness, redness, itching, uneven pigmentation and oiliness grades fell within the extract group, each among only 8 to 21 people with that sign. The trial was single-blind, used visual grading and was run by the maker.
Moisture of the tongue surface with pineapple glucosylceramide
In a double-blind crossover trial in 16 people with dry-mouth symptoms, tablets with 1.2 mg pineapple glucosylceramide a day for 2 weeks raised tongue-surface moisture and improved dryness ratings, which did not change on placebo. This is a very small, short study and does not show any effect on skin.
Mechanism of action
Little is absorbed intact
In rats fed corn glucosylceramide, its plant-type sphingoid base reached the lymph but cumulative recovery was very low, and the intact form did not appear to be reused well in tissues. Swallowed plant ceramides therefore probably do not simply travel to the skin and replace human ceramides.
Plant sphingoid bases may signal skin cells to make ceramides
In lab work with human skin cells and a 3D skin model, the sphingoid bases released from konjac glucosylceramide switched on genes for ceramide production and raised ceramide content, while intact glucosylceramide did not. This is cell research, not a measurement in people.
Ceramide-making enzymes in damaged mouse skin
In mice with damaged skin, dietary glucosylceramide sped barrier recovery and raised ceramide synthase 3 and 4 levels in the outer skin. The authors suggested the effect comes from switching on the skin's own ceramide production. These are animal results.
Clinical trials
Randomized, double-blind, placebo-controlled trial of a wheat extract oil rich in ceramides and digalactosyl diglycerides developed by Hitex; the paper does not use a brand name (Guillou et al. 2011, Int J Cosmet Sci).
51 women aged 20 to 63 with dry to very dry skin; 350 mg/day wheat extract oil or placebo for 3 months.
Corneometer hydration rose more than placebo on the arms (P < 0.001) and legs (P = 0.012). Dermatologist scores for dryness, roughness and redness did not differ significantly between groups, and self-rated hydration only trended better (P = 0.084).
Randomized, double-blind, placebo-controlled trial with 12 weeks of supplementation and 8 weeks of follow-up, plus a lab study on donated skin; authors include Robertet staff (Boisnic et al. 2019, J Cosmet Dermatol).
64 healthy women aged 45 to 60; wheat extract oil polar lipids or placebo. The dose is not given in the abstract.
Crow's feet wrinkle grade fell more than with placebo from week 8, reaching a drop of about one grade at week 12. Facial hydration improved over 12 weeks and leg hydration from week 4. Roughness and radiance improved by week 8. The collagen result came from UV-exposed skin samples in the lab, not from participants.
Double-blind, randomized, parallel-group trial of a wheat polar lipid complex as oil or powder versus placebo, run by Seppic researchers (Kern et al. 2024, J Cosmet Dermatol).
72 women with dry and wrinkled skin, 24 per group, each group including at least 10 postmenopausal women; 56 days of supplementation and 56 days of follow-up. The dose is not given in the abstract.
Hydration, smoothness and elasticity rose and water loss, roughness and wrinkle depth fell from day 14, including in postmenopausal women. None of the gains lasted after supplementation stopped. Single company-run study.
Single-center, single-blind, placebo-controlled randomized trial of a konjac tuber extract standardized to 5% glycosylceramides (SkinCera), funded by Vidya Herbs (Heggar Venkataramana et al. 2020, BMC Complement Med Ther).
51 healthy adults aged 18 to 60 enrolled, 40 completed; 100 mg/day extract or placebo for 6 weeks.
The overall dermatologist skin score improved more than with placebo (p < 0.001), while placebo scores worsened. Dryness, pigmentation, redness, itching and oiliness grades fell within the extract group (p < 0.05), each among only 8 to 21 people who had that sign. No adverse events. No instrument measures of hydration or water loss were reported.
Open-label, single-arm prospective study of rice ceramide capsules (Komecera, Nexus Wise); the lead author works in Nexus Wise research and development (Leo et al. 2022, Nutrients).
50 healthy adults without chronic skin disease, most aged 21 to 40; one 40 mg capsule a day for 3 months; no dropouts.
Hydration, firmness, elasticity and wrinkle severity improved and water loss, melanin and redness readings fell from baseline (p < 0.01). With no placebo group, which the authors name as a key limitation, these changes cannot be separated from season or expectation.
Placebo-comparison study, published in Japanese with an English abstract, of oral corn-derived NIPPN ceramide CP and topical rice ceramide (Asai et al. 2007, Rinsho Byori).
Healthy volunteers; the abstract does not give the number in the oral part.
After 3 weeks, leg stratum corneum water content rose to 290% (20 mg) and 394% (40 mg) of baseline versus 141% on placebo, and water loss fell more than with placebo (p < 0.05). Group sizes and blinding are not reported in the abstract, so these large figures are hard to judge.
Randomized, double-blind, placebo-controlled trial of a capsule (HyaCera) with 350 mg wheat oil extract and 120 mg sodium hyaluronate, run and funded by the product maker Ritual with support from the hyaluronate supplier (Grier-Welch et al. 2025, Dermatol Ther (Heidelb)).
68 healthy adults aged 26 to 64 randomized and 63 completed (31 active, 32 placebo); 12 weeks.
Crow's feet wrinkles and facial smoothness improved versus placebo from week 8, and leg hydration and elasticity rose. Because the capsule also contained hyaluronic acid, the results cannot be credited to the wheat ceramides alone.
Double-blind randomized crossover trial with two 2-week periods and a 4-week washout; tablets supplied by Maruzen Pharmaceuticals, study supported in part by a Japanese public research grant (Murakami et al. 2019, Nutrients).
16 people with dry-mouth (xerostomia) symptoms; one tablet with 1.2 mg pineapple glucosylceramide or placebo daily.
Tongue-surface moisture and the dryness rating improved after the active tablets but not after placebo. The number of taste papillae did not change. Only the mouth was assessed.