As you are able to create your own poison, you henceforth have a built in resistance to them.

Biologically included in one of the forearms of the Beefolk is a stinger that detaches upon striking an enemy. As a bonus action, a Beefolk can make a versatile attack roll that they are proficient with, upon striking, it deals 1d6 poison damage and the defender needs to make a constitution save equal to 8 + Constitution Modifier + Proficiency Bonus, on a failed save, they are poisoned until the end of their next turn. This barb regrows each week and can be 'milked' for a weaker serpent venom. If harvested, it refills at the end of your next long rest.

This poison’s damage increases by 1d6 when you reach 4th level (2d6), 10th level (3d6), and 16th level (4d6).

Using glands located in the throat/upper chest area, over the span of 1 hour you ae able to create a bottle of honey, which, when ingested, heals the drinker 1d6 + Constitution health. 

The honey’s healing increases by 1d6 when you reach 4th level (2d6), 10th level (3d6), and 16th level (4d6).