While manganese in typical dietary amounts is health-promoting, it has been known for a while that acute manganese (Mn) exposure is neurotoxic and can cause PD-like symptoms.
A new study has found that Mn can help in the propagation of misfolded alpha synuclein:
medicalxpress.com/news/2019...
While consuming foods high in manganese does not lead to excess levels in the body, drinking water containing manganese can:
lpi.oregonstate.edu/mic/min...
What about tea? Consuming regular tea (Camelia sinesis) apparently does not result in excess Mn levels:
ncbi.nlm.nih.gov/pubmed/161...
Both yerba mate and hibiscus teas also contain a lot of manganese. In fact, a while back I entered a cup of yerba mate on cronometer and found it exceeded the daily upper limit (UL); I checked again before posting, and the value had been revised to only 1 mg/ cup (the UL is 11 mg for adults). Hmmm... Regardless, frequent yerba mate tea consumption has been found to be associated with lung cancer in men:
ncbi.nlm.nih.gov/pubmed/882...
Manganese exposure is a risk factor for cancer:
sciencedaily.com/releases/2...
NutritionFacts has posted guidelines on hibiscus tea consumption:
Urolithin A (mitopure) and Palmitoylethanolamide and Akkermansia muciniphila
