Anti-regen status effect

This idea can make fighting witches harder or easier. This status effect can be applied via potions or commands. What the effect does is fairly simple: prevents you from regenerating your health, and can also make it impossible for you to recover hunger until the effect wears off. This effect when applied deals no damage, lasts for 25-30 seconds (1:00-1:50 If potion effect is extended). In order to make the potion, you must have poisonous potatoes to brew it. This would give poisonous potatoes a use, and would make combat a bit more interesting. And a tipped arrow with this status effect would apply the effect for 10 seconds.