Praise be to Allaah.
We have read a great deal about the benefits of the tea
mentioned in the question; the issue of its benefits should be referred to
With regard to the amount of alcohol in this tea, it is a
very low amount that does not lead to drunkenness, hence drinking it is not
haraam because of that.
See the answer to question no.
60212 in which there is an
answer concerning fermented tea.
Shaykh al-Islam Ibn Taymiyah (may Allah have mercy on him)
Everything that is called water is pure and a means of
purification, whether some impurity has fallen into it or not, if it is
known that it has dissolved into it and disappeared. As for that in which
traces of impurity are apparent, it is haraam to use it, because it comes
under the heading of using something haraam. End quote.
Majmoo‘ al-Fataawa, 19/236, 237
He also said:
Allah has forbidden impure things (khabaa’ith), namely
blood, dead meat, pork and so on. If any of these things fall into water etc
and disappear, so there is no blood, dead meat or pork left at all, similar
to the case where alcohol disappears in a liquid, then the one who drinks it
is not drinking khamr. End quote.
Majmoo‘ al-Fataawa, 21/501, 502
See also the answer to question no.
Based on that, there does not seem to be anything wrong with
drinking this tea.
And Allah knows best.