FAQs
Q1. What is Tetrahexyldecyl Ascorbate in Hydrinity Hydri-C Daily Vitamin C Moisturizer — how is it different from regular Vitamin C?
A1. Tetrahexyldecyl Ascorbate (THDA) is a fully stable, oil-soluble ester form of Vitamin C. Pure Ascorbic Acid — the conventional Vitamin C in most serums — is water-soluble, highly unstable (oxidises within weeks of exposure to air and light), requires a low pH of 3.5 or below to penetrate skin effectively, and causes tingling or irritation at active concentrations on sensitive skin. THDA has none of these limitations: it is stable at room temperature without preservative acid buffers, compatible with a neutral-pH moisturiser formula, and actually penetrates the stratum corneum more efficiently than ascorbic acid because the skin's outer layers are more lipophilic than aqueous. Inside the skin, THDA is converted by esterases into free Ascorbic Acid — providing the full antioxidant, collagen-stimulating, and tyrosinase-inhibiting benefits of Vitamin C from a far more stable and skin-friendly delivery form.
Q2. What is MicroFusion Technology in Hydrinity Hydri-C Daily Vitamin C Moisturizer?
A2. MicroFusion Technology is a microemulsion delivery system that enables the lipophilic Tetrahexyldecyl Ascorbate to be uniformly dispersed in a water-based moisturiser formula. Oil-soluble actives in water-based formulas tend to separate or require harsh emulsifiers that can irritate skin. MicroFusion produces stable, sub-micron oil droplets that remain evenly suspended and apply smoothly without a greasy texture — delivering THDA in micro-droplets that contact the stratum corneum and diffuse across the lipid-rich intercellular matrix of the skin's outer layers for efficient penetration.
Q3. Why is Kakadu Plum included in Hydri-C Daily Vitamin C Moisturizer alongside synthetic Tetrahexyldecyl Ascorbate?
A3. Kakadu Plum (Terminalia ferdinandiana) from Northern Australia contains up to 5,000 mg of Vitamin C per 100 g of fruit — the highest measured natural Vitamin C concentration of any food source, approximately 100 times that of oranges. However, Kakadu Plum extract in a moisturiser contributes more than just Vitamin C: it provides natural ellagic acid (a polyphenol with independent brightening and antioxidant activity), gallic acid, and flavonoids that work alongside the THDA. The combined natural-plus-synthetic Vitamin C approach provides both the stability advantages of THDA and the synergistic phytocomplex benefits that isolated synthetic esters alone cannot replicate.
Q4. What does Fulvic Acid do in Hydrinity Hydri-C Daily Vitamin C Moisturizer?
A4. Fulvic Acid is a humic substance produced by the microbial decomposition of organic matter in soil. In cosmetic science, it is of interest for three properties: its antioxidant and anti-inflammatory activity (inhibiting pro-inflammatory cytokine release), its chelating ability (binding heavy metal contaminants in the skin surface that would otherwise catalyse oxidative damage — particularly relevant in Indian urban environments with high pollution particulate exposure), and its transdermal enhancement effect (improving skin permeability for co-applied actives). In Hydri-C, Fulvic Acid functions as an environmental detox and penetration-enhancing agent that makes the THDA and natural Kakadu Plum actives work more effectively.
Q5. Can Hydrinity Hydri-C Daily Vitamin C Moisturizer replace a separate Vitamin C serum and day moisturiser?
A5. For many routines, it can serve as an efficient two-in-one morning step. The moisturiser format delivers THDA effectively without requiring the low-pH vehicle that pure Ascorbic Acid serums depend on, which means it can be applied directly after cleansing without a toner or pH-adjustment step. However, those whose primary goal is maximum antioxidant protection or fastest brightening may prefer layering a dedicated high-concentration Ascorbic Acid or THDA serum under the moisturiser for higher active concentration at the skin surface. As a standalone morning moisturiser, Hydri-C is well-suited to all skin types including oily and combination — the MicroFusion emulsion is lightweight and non-comedogenic, and it provides a good base for SPF50+ application.
