Aluminum in matcha? Do I have to worry?
Aluminium occurs in small traces in almost all vegetables and fruits. When testing 1kg of Matcha powder, naturally various trace elements will be found, but it is important to remember the concept "the dose makes the poison".
Below is an excerpt from K-Tipp claiming that the aluminium content in Matcha is too high. However, K-Tipp does not say which organisation the guidelines come from or how this affects daily consumption:

And how is it at MatchaLand?
At MatchaLand we regularly test our Matcha for heavy metals and are always well below the limits.
Our latest aluminium value was 60 mg per 100 g of Matcha. Aluminium is a natural component of many foods, which is why there are strict guidelines for safe intake. The European Food Safety Authority (EFSA) recommends a maximum of 1 mg aluminium per kg of body weight daily.
Is 60 mg per 100g bad?
Here is an example: For a body weight of 60 kg, the safe limit is therefore 60 mg aluminium per day. With two Matcha lattes daily (about 2 g Matcha per serving), the aluminium intake would be only about 1.2 mg – so well below the recommended limit. 😊
You would have to drink about 54 Matcha lattes in one day to reach the safe daily aluminium limit. 😊