There is an abstract in every academic paper and this paper had this bit in the abstract: "The estimated daily dose of lead exceeded the California Maximum Allo

There is an abstract in every academic paper and this paper had this bit in the abstract: "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.". As others have written, "Blood lead levels did not increase" does not mean there is no long-term health problem, it was simply outside the scope of the publication. Academic paper titles are almost always describe what the paper is about, not what the conclusion is. Academics don't do frontloading, thankfully. Edit: to look into the title further, you can see that it starts with "A _pilot_ study". This can indicate that the sample size of 5 mugs was not a mistake and the main purpose of the paper is to get feedback on the methodology and a larger follow-up study may be underway and we shouldn't be deriving any (health-related) conclusions from this paper.