Unless you’re certain your plumbing does not contain lead, never use hot tap water for cooking or drinking. Hot water is far more likely to leach lead from pipes, especially if it has been standing in the pipes for a while.
People who are lactose intolerant have great difficulty digesting dairy products, leading to gas, cramps, and other symptoms. But the live cultures found in probiotic yogurts may ease some of the burden.
For many cheeses, especially aged European-style ones, the distinctive rinds are considered essential parts that add characteristic flavor and texture, usually thanks to microorganisms growing on them during the ripening process.