The present invention provides a method for preparing a personal care product (302), comprising steps of obtaining a wood vinegar (203, 301) and adding the wood vinegar (203, 301) into the personal care product (302) so that the purified wood vinegar (301) makes up 18-22% of the total weight or volume of the personal care product. The wood vinegar (203, 301) is obtained by pyrolysis (100) of woods and leaves (102) from Rhizophora apiculata (101), wherein the wood vinegar (301) inactivates or kills microorganisms that cause skin and urinary tract infections but retains a substantial amount of beneficial microorganisms. The wood vinegar (203, 301) is obtained without having guaiacol.本發明提供了一種製備個人護理產品(302)的方法，所述方法包括以下步驟：獲得木醋酸(203、301)以及將所述木醋酸(203、301)添加到所述個人護理產品(302)中，使得純化的木醋酸(301)占所述個人護理產品的總重量或總體積的18-22%。所述木醋酸(203、301)是通過來自紅樹(101)的木材和葉片(102)的熱解(100)獲得的，其中所述木醋酸(301)滅活或殺滅引起皮膚和尿路感染的微生物，但保留大量有益微生物。所述木醋酸(203、301)在沒有愈創木酚的情況下獲得。
