I tried the 300ppm version of this product and liked it, so I decided to purchase this higher concentration. There aren't many retinal products out there, and this one is relatively affordable, making it easy to use without hesitation. I'm not sure how high 1000ppm is in terms of concentration, but since you don't apply these products as liberally as creams, I think it should last about 2-3 months.
When I used the 300ppm, my skin felt moisturized and free of dead skin cells, which was great. With this product, I've noticed some blemishes appearing, making me wonder if the higher concentration might be too much for my skin. However, blemishes can be caused by various factors, including digestive issues, so I can't definitively blame this product. Despite the higher concentration, which can sometimes cause flaking, I haven't experienced any dead skin cell buildup. Also, it's fragrance-free.
The only downside might be the shipping fee. As for the product itself, I haven't found any significant drawbacks so far.
