請問每當成份包含 \"alcohol\" 此字，是否表示該產品就一定有酒精呢？

并不是

致粉刺指數2

資料來源https://skinsalvationsf.com/comedogenic/

MF: C14H30O MW: 214.39g/mol

【Myristyl Alcohol】

Rating: GOOD
Benefits: Hydration
Categories: Emollient, Cleansing Agent, Texture Enhancer

A lighter-weight fatty alcohol that functions as a thickener, emulsion stabilizer, and emollient. It is also sometimes used as a surfactant, often with other surfactants. It is considered safe as used in cosmetics.

https://www.paulaschoice.com/ingredient-dictionary/ingredient-myristyl-alcohol.html