RE: Kaffee - 8

Anscheinend sind Schwermetalle auch bei Kaffee und Tee ein Thema.

Hier haben die Becher angeblich Blei freigesetzt:

A pilot study to assess lead exposure from routine consumption of coffee and tea from ceramic mugs: comparison to California Safe Harbor Levels

Zitat

---

However, a statistically significant difference was observed in the lead concentrations measured between cups, indicating that the lead concentrations were dependent on the cup used, rather than on the beverage or retention time. The estimated daily dose of lead exceeded the California Maximum Allowable Dose Level of 0.5 μg per day for one of the five mugs tested. Blood lead levels did not increase above regulatory or guidance values.

---

https://foodsafetyandrisk.biomedcentral....0550-017-0049-7

Also besser mal genau überprüfen, wie sicher der Lieblingsbecher ist?

Zitat

---

Another heavy metal that’s been found in high levels in some coffee varieties is lead. While some sources will argue that the levels of lead found in coffee are below the regulatory limits, the fact of the matter is — there is no safe level of lead in your body (and the World Health Organization agrees)[11][12].

Lead exposure can be particularly dangerous for the central nervous system, potentially leading to behavioral or neurological issues over time. In lead exposure, issues such as difficulties in learning, language, memory, attention, and processing have all been identified as possible correlations[13]. Lead tends to accumulate in the bones.

---

https://myersdetox.com/4-heavy-metals-hi...coffee-and-tea/

Concentrations of heavy metals (Mn, Co, Ni, Cr, Ag, Pb) in coffee

Zitat

---

This finding gives new data for Mn, Co, Ni, Cr, and Ag intake from coffee , and suggests that the amounts are negligible. However, the data for Pb consumption in heavy drinkers, for example in Bosnia and Herzegovina, indicate that Pb intake from coffee may contribute to the disease burden. The high lead level in some coffees suggests the need for a more precise control of coffee contamination.

---

https://pubmed.ncbi.nlm.nih.gov/24340307/

Assessment of the risk of exposure to cadmium and lead as a result of the consumption of coffee infusions

Zitat

---

The paper aimed to analyse the safety of drinking coffee by adult Poles in terms of Pb and Cd content. The degree to which Cd and Pb passed from coffee grounds into the coffee infusion was also examined. Twenty-three samples of natural coffee were examined. The content of metals was determined using the ICP method. On average, dry coffee contained ca. 0.004 μg Cd and 0.05 μg Pb per 1 g, and 95.5% Cd and 94% Pb passed into the infusion. Drinking coffee supplies these metals in the amount of less than 2% TWI (tolerable weekly intake) for Cd and BMDL (benchmark dose lower confidence limit) for Pb. In the presented studies, the values of CDI (chronic daily intake), THQ (target hazard quotient) and HI (hazard index) indicators were lower than 1, which means that the risk of developing diseases connected with chronic exposure to Cd and Pb consumed with coffee must be evaluated as very low. The content of Cd and Pb in the analysed coffee infusions was very low, so drinking coffee does not pose a risk for consumers in terms of the content of these metals. However, it must be remembered that no threshold limits for toxic metal consumption exist because these metals accumulate in the body for a long time. The studies presented here also showed a low (r = 0.26) but still a positive correlation between the content of Pb in coffee and the degree (%) to which Pb passed into the infusion. This problem should be thoroughly investigated.

---

https://pubmed.ncbi.nlm.nih.gov/32789644/

Ein Kaffee-Guide

https://getpocket.com/de/collections/kaf...et-newtab-de-de

Kennt jemand Bulletproof Coffee?

https://www.brain-effect.com/magazin/bul...f-coffee-rezept

Habs mal mit Bio-Kokosfett und irischer Butter probiert. Einen wachmachenden Effekt gabs nicht.

Soll angeblich Körperfett abbauen.

Zitat von Prometheus im Beitrag #178

---

Kahweol, a coffee diterpene, increases lifespan via insulin/insulin-like growth factor-1 and AMP-activated protein kinase signaling pathways in Caenorhabditis elegans
https://www.sciencedirect.com/science/ar...665927123001867

Kaffeebohnenöl enthält übrigens ca. 15% Kahweol

---

#180
Da hat man bei Google Scholar und PubMed die Suchbegriffe "Kahweol and Cancer" und "Cafestol and Cancer" eingebene, um eine Übersichtsarbeit zu verfassen.
Auf irgendeine Weise scheinen die beiden Wirkstoffe Krebszellen auf diverse Art und Weise zu beeinflussen (weniger Herstellung von neuen, verhindert die Migration) und lässt dabei die normalen Zellen in Ruhe. Was ich sehr erstaunlich finde.
Falls es sich nicht um ein Artefakt handelt, dann denke ich, dass entweder etwas spezifisches am Stoffwechsel des Krebses gehemmt wird (wie auch immer) oder dass man vielleicht einen Blick auf die Wirkung auf Stammzellen werfen sollte.
Aber das sind unhaltbare Spekulationen.

Mein erster Blick wäre, ob es eventuell eine Gemeinsamkeit bei den Modelorganismen oder den Krebszellen, die als Modell genommen werden, gibt.

Interessant ist es auf jeden Fall.