nutrition adjustment wrapper procs.

code/game/objects/effects/decals/cleanable/misc.dm

@@ -133,7 +133,7 @@
 			if(reagents)
 				for(var/datum/reagent/consumable/R in reagents.reagent_list)
 					if(R.nutriment_factor > 0)
-						H.nutrition += R.nutriment_factor * R.volume
+						H.adjust_nutrition(R.nutriment_factor * R.volume)
 						reagents.del_reagent(R.type)
 			reagents.trans_to(H, reagents.total_volume)
 			qdel(src)

code/game/objects/items/granters.dm

@@ -249,10 +249,8 @@
 /obj/item/book/granter/spell/smoke/recoil(mob/user)
 	..()
 	to_chat(user,"<span class='caution'>Your stomach rumbles...</span>")
-	if(user.nutrition)
-		user.nutrition = 200
-		if(user.nutrition <= 0)
-			user.nutrition = 0
+	if(user.nutrition > NUTRITION_LEVEL_STARVING + 50)
+		user.set_nutrition(NUTRITION_LEVEL_STARVING + 50)
 
 /obj/item/book/granter/spell/blind
 	spell = /obj/effect/proc_holder/spell/targeted/trigger/blind