Spigel products can be used multiple times a week without burden. Especially in the summer, it seems to improve skin texture. It absorbs quickly and does not leave a residue when other skincare products are applied on top.

According to the characteristics of Speculums, using them daily may result in a feeling of dryness.

Apply the botulinum ampoule and then apply the moisture ampoule on top for increased hydration.

This is the first time I've used a product containing retinol, so I can't really compare it, but it's not extremely irritating. If you apply it gently with your hands, it has a slight tingling sensation. It's quite interesting! So I feel like the subsequent skincare products are able to absorb well. However, it wasn't irritating to the point of being unbearable.

The dropper doesn't seem to work well, perhaps due to the formula. So I have to press it multiple times. And my skin is quite sensitive, so using it too often might irritate it, so I think I should use it once a week or every other week. However, aside from the irritation, I didn't really notice any significant changes from using this product. It's a bit disappointing. It's not something I reach for easily. I guess I'll have to use it for longer to see if there are any noticeable effects, but there haven't been any major issues or problems.