A replenishing, gel-like serum with an advanced, active 12% ceramide complex that works to help strengthen the skinu0027s natural lipid barrier, keeping it looking smooth, hydrated and healthy. Boosted with niacinamide and 2% azelaic acid, this lightweight serum works to rebalance and soften the skin, refining the look of the complexion. Clinically proven to reduce trans epidermal water loss (TEWL).5% SK-Influx V MB ceramide blend with AP, NP and EOP to help improve the skinu0027s natural lipid barrier and moisture retention3% niacinamide helps to condition skin and even out skin tone2% azelaic acid to help support elastin production and brighten the skins appearance2% glycerin, a humectant that helps to retain moisture in the skin1.5% biolin, a natural prebiotic known to rebalance the skinu0027s natural biomeVegan, cruelty-free and fragrance-free.HOW TO USEMassage into the skin morning and evening after using Ceramide Fix Cleansing Balm and Hyaluronic Fix Extreme4 Concentrate 2%, and follow with Hyaluronic Fix Extreme4 Overnight Bounce Water Cream in the evenings.WHAT ARE CERAMIDES?Ceramides are lipids (oils) found naturally in the skin and are essential in supporting the skins protective barrier and retaining moisture. They are the building blocks of our skin, comprising over 50% of its composition and play an important role in protecting it against external aggressors like UVA rays and environmental damage, as well as keeping it youthful and supple. Ceramide quantity and quality start to diminish as skin ages, and when ceramide levels are low, the skin barrier is weakened, allowing moisture to escape (known as transepidermal water loss, or TEWL), which makes it prone to irritation. This can lead to a damaged skin barrier, which causes dry, flaky skin, redness, irritation and dehydration. Applying ceramides directly to the skin helps replenish its barrier and retain moisture. Ceramides also help to improve the skins tolerance of active ingredients, such as glycolic and salicylic acids, by protecting the skin barrier.