Argan oil is incredibly rich in phytosterols – a compound which has been found to not only stop the slow-down of collagen production but often stimulate new production making Argan oil one of the most powerful anti-aging oils in the world. These plant sterols also reduce inflammation, improve skin metabolism and promote moisture retention.Argan oil moisturizes, strengthens and protects nails. It can nourish and repair dry and brittle nails by providing it with the vitamins and minerals it needs. For an effective Argan oil nail treatment, mix Argan oil and lemon juice together and soak your nails for fifteen minutes. Repeat this treatment weekly to restore your nails to their former glory.