Helen Keller International (HKI) is an organization focused on eliminating preventable vision loss, poverty-related health problems, and neglected diseases.

HKI's vitamin A supplementation (VAS) program distributes vitamin A supplements throughout sub-Saharan Africa. As of June 2021, GiveWell estimates that HKI can deliver a vitamin A supplement at a cost of about $1, and that a donation in the range of $3000–$5000 is expected to save the life of a child under five (GiveWell 2020a; GiveWell 2020b). (The cost of distributing vitamin supplements is much lower than the cost of saving a life because a small fraction of people who receive supplementation would otherwise have died from conditions related to vitamin deficiency, and because of other factors (GiveWell 2020c).)

Evaluation

HKI's VAS program has been a GiveWell top-rated charity since 2017, and its cost-effectiveness is estimated to be in the same range as GiveWell's other priority programs (GiveWell 2021). HKI is also featured in The Life You Can Save's list of "best charities" (The Life You Can Save 2021).