diff --git a/code/game/objects/items/weapons/dna_injector.dm b/code/game/objects/items/weapons/dna_injector.dm
index 7e49a4465b9..0bfcd30ef15 100644
--- a/code/game/objects/items/weapons/dna_injector.dm
+++ b/code/game/objects/items/weapons/dna_injector.dm
@@ -62,7 +62,7 @@
 
 /obj/item/weapon/dnainjector/proc/inject(mob/living/M as mob, mob/user as mob)
 	if(istype(M,/mob/living))
-		M.apply_effect(rand(10,25),IRRADIATE,0)
+		M.apply_effect(rand(10,25),IRRADIATE,-1)
 
 	if (!(NOCLONE in M.mutations)) // prevents drained people from having their DNA changed
 		// UI in syringe.
@@ -97,6 +97,7 @@
 		var/mob/living/carbon/human/H = M
 		if(H.species.flags & NO_DNA_RAD)
 			return
+			
 	if (!usr.IsAdvancedToolUser())
 		return
 
diff --git a/code/modules/mob/living/damage_procs.dm b/code/modules/mob/living/damage_procs.dm
index e219c342187..dfd271b1507 100644
--- a/code/modules/mob/living/damage_procs.dm
+++ b/code/modules/mob/living/damage_procs.dm
@@ -46,7 +46,8 @@
 
 /mob/living/proc/apply_effect(var/effect = 0,var/effecttype = STUN, var/blocked = 0)
 	blocked = (100-blocked)/100
-	if(!effect || (blocked <= 0))	return 0
+	if(!effect || (blocked <= 0))	
+		return 0
 	switch(effecttype)
 		if(STUN)
 			Stun(effect * blocked)
@@ -57,7 +58,10 @@
 		if(AGONY)
 			halloss += effect // Useful for objects that cause "subdual" damage. PAIN!
 		if(IRRADIATE)
-			radiation += max(effect * ((100-run_armor_check(null, "rad", "Your clothes feel warm.", "Your clothes feel warm."))/100),0)//Rads auto check armor
+			var/rad_damage = effect
+			if(blocked != -1) // Setting blocked to -1 overrides radiation armor checks, which are automatic otherwise
+				rad_damage = max(effect * ((100-run_armor_check(null, "rad", "Your clothes feel warm.", "Your clothes feel warm."))/100),0)
+			radiation += rad_damage
 		if(SLUR)
 			slurring = max(slurring,(effect * blocked))
 		if(STUTTER)
@@ -73,14 +77,9 @@
 	updatehealth()
 	return 1
 
-
-/mob/living/carbon/human/apply_effect(var/effect = 0,var/effecttype = STUN, var/blocked = 0)
-	if((species.flags & NO_DNA_RAD) && (effecttype == IRRADIATE))
-		return
-	return ..()
-
-
-/mob/living/carbon/apply_effect(var/effect = 0,var/effecttype = STUN, var/blocked = 0)
+/mob/living/carbon/human/apply_effect(var/effect = 0, var/effecttype = STUN, var/blocked = 0)
+	if((effecttype == IRRADIATE) && (species.flags & NO_DNA_RAD))
+		return 0
 	return ..()
 
 /mob/living/proc/apply_effects(var/stun = 0, var/weaken = 0, var/paralyze = 0, var/irradiate = 0, var/slur = 0, var/stutter = 0, var/eyeblur = 0, var/drowsy = 0, var/agony = 0, var/blocked = 0, var/stamina = 0, var/jitter = 0)