Minecraft wiki entry for Healing, associated text: Tipped arrow shots from a bow, crossbow, or dispenser inflict arrow damage and a status effect. Arrows of healing give the same effect as its potion (4 for an arrow of healing I, and 8 for an arrow of healing II). Regeneration I arrows last 5 seconds (restores 2), the extended regeneration I arrows last 0:11‌[JE only] / 0:15‌[BE only] seconds (restores 4‌[JE only] / 6‌[BE only]), and arrows of regeneration II give regeneration II for 0:02 seconds (restores 2). However, arrow damage decreases or sometimes even nullifies the health recovered unless a weak bow shot is used or the player is wearing good armor.