A study from a few years ago looked at some results from Alaska’s “Permanent Fund Dividend” - a policy that’s akin to a universal basic income scheme. It concluded that one of the side-effects of providing (mostly) unconditional money to its citizenry was a reduction in childhood obesity.

…we find that an additional one thousand dollars in PFD payments decreases the probability of an Alaskan child being obese by as much as 4.5 percentage points.