The adj beneficial has 2 senses (first 2 from tagged texts)
1. (6) beneficial, good -- (promoting or enhancing well-being; "an arms limitation agreement beneficial to all countries"; "the beneficial effects of a temperate climate"; "the experience was good for her")
2. (1) beneficial, good, salutary -- (tending to promote physical well-being; beneficial to health; "beneficial effects of a balanced diet"; "a good night's sleep"; "the salutary influence of pure air")