• gerbal@beehaw.org
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      1 year ago

      Instant gets much higher extraction than any other form of brewing. Hypothetically, it’s more likely to extract trace metals at higher concentrations than other methods.

    • Mika@beehaw.org
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      1 year ago

      Just some speculation, maybe sourcing cheaper/multiple kinds of beans? Is instant coffee single source? If it’s not it could be that some of the beans that are being sourced have higher lead content. I know for example that lead is a problem in tea leaves if not monitored for, as the plants will take up lead from the soil.