"In a meta-analysis of nutritional impacts of deworming, we find that in areas where the WHO recommends mass drug administration (>20% prevalence), multiple-dose deworming leads to statistically significant, positive increases in child weight, mid-upper arm circumference, and height. We then conduct a cost effectiveness analysis and find that MDA is many times more cost-effective than widely implemented school-feeding programs."

https://www.pnas.org/doi/10.1073/pnas.2308733121#sec-2