David R. Hamilton

David R. Hamilton is a writer and former pharmaceutical research scientist who interprets research on behavior, emotion, and physical wellbeing for general readers. The Five Side Effects of Kindness examines how helpful actions may affect mood, relationships, stress, cardiovascular responses, and the behavior of observers. Hay House first issued an ebook as The Five Side-effects of Kindness in 2017, then published the unhyphenated title The Five Side Effects of Kindness in paperback in 2021. Hamilton also wrote Why Woo-Woo Works and The Little Book of Kindness. His earlier pharmaceutical work informs his interest in mind-body research, while the charity 52 Lives names him as its honorary scientific adviser. Across these books, he translates published studies and case examples for a self-development audience.