I received this product in my Glam Bag Plus and really enjoyed it. I love trying new skin products for my rapidly changing 50yo skin. I really do see benefits from application of niacinamide ingredient, and have been experimenting with different brands and formulations. I have read niacinamide reacts with vitamin C and other acids, and have experienced this myself combining it with a product I didn't realize contained a reactive acid. It does not react with retinoids/retinol, so I have limited my use of it to my nighttime routine. Putting the word "sports" in the name, implies to me that you get a flushed look like you might after engaging in sports, which is counterintuitive to using at bedtime. But oh well, marketing is weird that way. Anyhow, it absorbs well and doesn't pill up like some inexpensive brands of niacinamide I've used. It smells lovely, layers very well before retinol, and I do wake up with lovely skin. I feel the price point is a little too high for what you detect, hence the subtraction of one star.