we have a big promotion of RHODIOLA ROSEA Extract, 3% rosavins & 1% salidroside, if interested, pls contact with me, free samples can send to you. Thanks & Best Regards, Ruby/Sciyu Biotech Co., Ltd Tel/Fax.: 86-29-85352872 Skype: sales04_1181 Phone/Whatsapp/Wechat:+86 13227837279 sales04@sybiotech.com https://sciyubiotech.en.alibaba.com