Wear a helmet when using a bicycle or an electric scooter, including during the summer period.

noli's read

This advice is based on a solid scientific foundation regarding the prevention of head trauma. Meta-analyses and observational studies (notably published in the Journal of the American Medical Association - JAMA) confirm that wearing a helmet considerably reduces the risk of serious head and brain injuries in the event of a fall or collision. The egg analogy, while simplified, effectively illustrates the vulnerability of the human skull to impacts. The argument concerning summer is relevant because heat can sometimes encourage people to forgo this equipment due to discomfort, even as the frequency of two-wheeled travel increases during this season. There is no exaggeration here, as helmet efficacy is an established consensus in road safety literature. No evidence contradicts the usefulness of wearing a helmet for these uses.

the sources

No named source held this one up — that absence is part of the verdict.