The study ranked 44 global countries in total.

Lenstore’s Healthy Lifestyle Cities Report 2021 aims to rank global cities from healthiest to unhealthiest. In this most recent report, they placed Johannesburg in the top 10 unhealthiest cities in the world. The researchers use about 10 metrics to decide how they are going to rank different destinations. These considerations include life expectancy, air and water quality, obesity levels and the cost of a gym membership. It found that Johannesburg has a very low life expectancy (56) and the lowest happiness level among citizens. Among the top 10 healthiest cities are Amsterdam, Sydney and Vienna.