I'm a man in my 30s. I received a 5ml sample and, concerned about the firmness and fatigue of my skin as I age, decided to incorporate it into my morning and evening skincare routine. The best thing about Elixir the Serum AA is its light, non-greasy texture, making it easy to use. It absorbs quickly into the skin, leaving it feeling plump the next morning. The vitamins also seem to enhance my skin's translucency, and it seems promising for addressing dullness. Even at night after a tiring day at work, applying this leaves my skin feeling thoroughly rested. It's almost fragrance-free and non-irritating, so I think even men can easily use it. I especially recommend it for those who want to seriously ramp up their daily anti-aging care routine and who prefer a non-greasy feel.