Trehalose serves as a high-performance humectant and cytoprotectant that mimics the skin’s Natural Moisturizing Factor. By stabilizing cellular membranes and proteins against desiccation, this “resurrection sugar” ensures prolonged hydration and resilience under environmental stress.
- INCI Name:
- Trehalose
- Chemical/Scientific Name:
- α-D-glucopyranosyl-α-D-glucopyranoside
- Common Aliases:
- Mycose, Mushroom Sugar, Resurrection Sugar
| Category: | Moisturizers |
| Source Origin: | Biotechnological fermentation (typically from Glucose or starch) or plant-derived (fungi, yeast, resurrection plants). |
| Comedogenic Rating: | 0 |
| Primary Industries: | Cosmetics, Dermatology, Food Science, Pharmaceuticals. |
| Solubility: | Water-soluble. |
At a Glance: Properties & Effects
| Hydration/Moisture | |
| Barrier Repair | |
| Formula Stability | |
| Irritation Risk |
- Primary Benefits: Deep humectancy, cellular membrane stabilization, antioxidant protection, and prevention of protein denaturation.
- Potential Risks: Extremely low; non-sensitizing and non-irritating for virtually all skin types.
Biological Action & Cosmetic Profile
Naturally occurring disaccharides like this one function through a mechanism known as the “Water Replacement Hypothesis.” When skin cells face extreme dehydration or osmotic stress, Trehalose replaces the water molecules surrounding lipid bilayers and proteins. This action prevents the collapse of cellular structures and maintains biological activity even in arid conditions, a trait famously observed in desert “resurrection” plants.Chemically, the molecule consists of two Glucose units linked by an α,α-1,1-glycosidic bond. This specific non-reducing structure makes it exceptionally stable against heat and acid hydrolysis compared to other sugars like Sucrose. In topical formulations, it acts as a small-molecule humectant that penetrates the upper layers of the stratum corneum to reinforce the skin’s moisture barrier.Recent dermatological research indicates that this ingredient may also induce autophagy, the natural process by which cells clear out damaged components. By promoting cellular “cleanup,” it supports long-term skin health and mitigates the visible signs of oxidative aging. Furthermore, its ability to inhibit the oxidation of fatty acids helps reduce body odor and maintains the integrity of oil-based components in a formula.
Broader Applications & Origins
While widely used in skincare, this sugar is a staple in the pharmaceutical industry for stabilizing vaccines and lab-grown tissues. Its origin spans a variety of organisms, including baker’s yeast, mushrooms, and certain hardy invertebrates like brine shrimp. In modern cosmetic manufacturing, it is primarily produced through large-scale enzymatic conversion of starch, ensuring a high-purity, vegan-friendly ingredient.
Routine Integration
- Synergies: Performs exceptionally well when paired with Glycerin, Sodium Hyaluronate, and Urea to create a multi-level hydration network. It also stabilizes sensitive actives like Ascorbic Acid by protecting them from rapid oxidation.
- Conflicts: No known clinical conflicts; compatible with all major cosmetic actives including retinoids and exfoliating acids.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel has evaluated Trehalose multiple times, concluding it is safe for use in cosmetics at concentrations up to 10% or higher. It is classified as “Generally Recognized as Safe” (GRAS) by the FDA for oral consumption, which underscores its benign toxicological profile. Dermatological testing consistently shows zero to negligible irritation or sensitization potential, making it a preferred humectant for sensitive or compromised skin barriers.
Is Trehalose better than Hyaluronic Acid?
They serve different roles. While Sodium Hyaluronate holds massive amounts of water on the surface, Trehalose is a smaller molecule that focuses on stabilizing cell membranes and protecting against dehydration stress at a deeper level. They are most effective when used together.
Can this ingredient help with eczema or rosacea?
Yes, because it mimics the Natural Moisturizing Factor and prevents “osmotic shock” in skin cells. Its soothing properties help reduce the inflammation and trans-epidermal water loss (TEWL) often associated with barrier-compromised conditions.
Does it have any anti-aging benefits?
Indirectly, yes. By maintaining cellular hydration and potentially stimulating autophagy (cell cleaning), it helps preserve the structural integrity of the skin and prevents the formation of fine lines caused by chronic dehydration.