healful
Tending or serving to heal; health-promoting; healing.
As for psychogenic death, this will be the case when three supplementary, in this case, healful conditions are fulfilled: […]
Full of health or safety; healthy; whole; sound; safe.
[…] I believe my Father catched [sic] cold on his journey, tho' he was otherways a very strong healful man, for on his return to Pennicuik a boile broke out between his shoulders, which in a very few days turn'd to a Mortification.
Affording health or salvation.
[…] since Christ will not fail to minister, himself, all lawful and healful sacraments, and necessary at all time, and especially at the end, […]
Where it comes from
From Middle English heeleful, heleful, equivalent to heal (“health, well-being”) + -ful. Compare healless.
Adapted from the Wiktionary entry healful (CC BY-SA 4.0).