Milk Arrows datapack by mzxciap.
This datapack works in all gamemodes, single and multi player.
This datapack does not require a resource pack.
This datapack works with all other datapacks (unless they use conduit power 127 or higher) (namespaces notwithstanding).
This datapack adds milk arrows, that when they hit a mob or player, clear all of their effects.
To Craft (shapeless) you need:
1x Arrow
1x Milk Bucket

Makes 1.

Datapack namespace: "marrow:".
Tag/scoreboard namespace: "mar_".
To give yourself one (in creative only) type:
"/trigger mar_give"
Or, to give yourself multiple type:
"/trigger mar_give set <amount>"