Parfum (synthetic fragrance) is listed as a single ingredient in this leave-on product, but can contain dozens of undisclosed chemical compounds. Fragrance is the leading cause of contact dermatitis and sensitisation in skincare, and the specific allergens in this formula are not disclosed — making it impossible for fragrance-sensitive users to assess their risk. CI 42090 (Brilliant Blue FCF) is a cosmetic azo dye with no skin benefit and documented allergen potential in some individuals. The hydration actives — multi-weight Sodium Hyaluronate and Glycerin — are safe and well-studied.

Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Glycerin, and Panthenol together form a solid hydration system — both low-molecular-weight HA for deeper moisture and high-MW HA to form a surface reservoir. The '72HR Hydration' duration claim is a marketing statement, not a figure supported by a published study for this specific formula; Hyaluronic Acid evidence is strong, but the 72-hour figure is not independently verified. Synthetic fragrance and the blue azo dye serve no skin function and increase allergen load in a product used daily on the face.

The full INCI is published on dotandkey.com and both the fragrance and azo dye are listed. However, fragrance constituent allergens are disclosed only as 'Parfum' with no further breakdown. The '72HR Hydration' claim is unsubstantiated by any cited clinical study for this specific product. The blue dye is present purely for aesthetic reasons — this is not communicated to consumers, who may reasonably assume every ingredient in a skincare product is functional.

Synthetic fragrance is present with an undisclosed chemical composition. Azo dye CI 42090 has documented aquatic toxicity concerns. Dot & Key is an Indian brand. Packaging is plastic.