I love green tea. Meaning I learned to drink it plain, a far cry from years of tea with lemon and sugar or coffee with cream and sugar, lol.

Plain green tea is fine. It's the cream that alters the IF. That is if you are trying to maximize non- eating hours.

If for weight loss or maintenance, you would need to trial the second "meal", or snack.

That's my two cents. Not an expert, but did a lot of reading.