YOU SAID:

I need to take iron supplements cause I’m so weak

INTO JAPANESE

私はとても弱いので鉄のサプリメントを取る必要があります

BACK INTO ENGLISH

I'm so weak that I need to take iron supplements

INTO JAPANESE

私はとても弱いので鉄分サプリメントを摂る必要があります

BACK INTO ENGLISH

I'm so weak that I need to take iron supplements