Environ HA Intensive Hydrating Serum contains a high concentration of Hyaluronic acid. The moisture binding characteristic of this special molecule may help to improve the appearance of dehydration, leaving the skin visibly smoother and plumper. KEY INGREDIENTS Low Molecular Weight (LMW) Sodium Hyaluronate BENEFITS Helps to plump and smooth the appearance of dehydrated skin A special ingredient (hyaluronic acid) in the serum’s formulation occurs naturally in your skin but reduces with the ageing process.