I was really satisfied using the Bydureon Lactic Acid Serum Trouble Ampoule. This serum absorbs into the skin very smoothly, and it gave me an immediate soothing effect on my skin troubles. Especially, as an oily-skinned person, I liked that it finished off my skin without any greasiness, leaving it refreshed. After just a day or two of use, my skin troubles had definitely decreased, and I felt my skin becoming calmed. There was a slight cooling sensation, which was perfect for using in the summer, and I could feel my skin becoming clearer without any unnecessary irritation. Additionally, it absorbed quickly without any stickiness, so there were no issues using it alongside other products.

However, in my case, I felt a slight dryness when I first used it. The soothing effect on blemishes was certainly effective, but on very dry days, additional moisturization may be necessary. So I applied a moisturizing cream as well. Also, the price is a bit on the higher side, so continuous use could be a burden on my budget. It is truly effective for troubled skin, but it may be too irritating for normal skin.

It's a great pore-minimizing effect!! I recommend applying it directly to bare skin.

There may be some initial irritation when first using it. Caution around the nose area!! There are no major downsides.

If this is your first time using it, use it every other day. Once you get used to it, use it daily.