This is a single-use serum. Purchased July 2025 Expiration date: April 3, 2027 I'm selling it because I don't use it. I'd like to sell it to someone who needs it. ★Instant purchase OK ★Shipping included Feel free to ask any questions (^o^) ★Returns and exchanges are not accepted, so please consider carefully before purchasing. ★Basically, I don't hold items. First come, first served. ★Price negotiations are generally not conducted as the price includes shipping. ★Please also check "Please read first" just in case. I hope for a pleasant transaction. Thank you very much (^^)