Aluminum in matcha? Should I be worried?
Aluminium is present in trace amounts in almost all vegetables and fruits. If you test 1kg of matcha powder, you will naturally find various trace elements, but it is important to remember the concept of "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 state which organization the guidelines come from and how this affects daily consumption:

And what about MatchaLand?
At MatchaLand, we regularly test our matcha for heavy metals and are always well below the limit values set by the Japanese organic organization JAS. 😊
Our last aluminium reading 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 of aluminium per kg of body weight daily.
Is 60 mg per 100g bad?
Here is an example: With a body weight of 60 kg, the safe limit is 60 mg of aluminium per day. With two matcha lattes per day (approx. 2 g of matcha per serving), the aluminium intake would only be about 1.2 mg – so far below the recommended limit. 😊
You would therefore have to drink approx. 54 matcha lattes in one day to reach the safe daily aluminium limit. 😊