diff --git a/Resources/Prototypes/Reagents/elements.yml b/Resources/Prototypes/Reagents/elements.yml
index 618dea7c90..00c283ddb9 100644
--- a/Resources/Prototypes/Reagents/elements.yml
+++ b/Resources/Prototypes/Reagents/elements.yml
@@ -39,6 +39,13 @@
       amount: -3
     - !type:PlantAdjustHealth
       amount: -1
+  metabolisms:
+    Poison:
+      effects:
+      - !type:HealthChange
+        damage:
+          types:
+            Poison: 2
 
 - type: reagent
   id: Copper
@@ -50,6 +57,14 @@
   color: "#b05b3c"
   boilingPoint: 2595.0
   meltingPoint: 1083.0
+  metabolisms:
+    Poison:
+      metabolismRate: 0.1
+      effects:
+      - !type:HealthChange
+        damage:
+          types:
+            Poison: 0.1
 
 - type: reagent
   id: Fluorine
@@ -70,7 +85,14 @@
       amount: -4
     - !type:PlantAdjustHealth
       amount: -2
-
+  metabolisms:
+    Poison:
+      effects:
+      - !type:HealthChange
+        damage:
+          types:
+            Caustic: 0.5
+            Poison: 0.5
 - type: reagent
   id: Gold
   name: reagent-name-gold
@@ -130,6 +152,21 @@
   color: "#c6c8cc"
   meltingPoint: 180.5
   boilingPoint: 1330.0
+  metabolisms:
+    Poison:
+      metabolismRate: 0.1
+      effects:
+      - !type:HealthChange
+        damage:
+          types:
+            Poison: 0.05
+      - !type:Emote
+        emote: Scream
+        probability: 0.05
+      - !type:Emote
+        emote: Laugh
+        probability: 0.05
+
   # TODO: cause confusion and some brain damage
 
 - type: reagent
@@ -148,7 +185,7 @@
       - !type:HealthChange
         damage:
           types:
-            Poison: 2
+            Poison: 1
 
 - type: reagent
   id: Potassium
@@ -201,6 +238,13 @@
   color: "#364266"
   boilingPoint: 3265.0
   meltingPoint: 1414.0
+  metabolisms:
+    Poison:
+      effects:
+      - !type:HealthChange
+        damage:
+          types:
+            Poison: 1.5
 
 - type: reagent
   id: Silver
@@ -223,6 +267,13 @@
   color: "#fff385"
   boilingPoint: 445.0
   meltingPoint: 120.0
+  metabolisms:
+    Poison:
+      effects:
+      - !type:HealthChange
+        damage:
+          types:
+            Caustic: 0.1
 
 - type: reagent
   id: Sodium
@@ -272,4 +323,4 @@
   flavor: metallic
   color: "#bababa"
   meltingPoint: 419.5
-  boilingPoint: 907.0
\ No newline at end of file
+  boilingPoint: 907.0
diff --git a/Resources/Prototypes/Reagents/gases.yml b/Resources/Prototypes/Reagents/gases.yml
index 3637beadea..f3f298a721 100644
--- a/Resources/Prototypes/Reagents/gases.yml
+++ b/Resources/Prototypes/Reagents/gases.yml
@@ -150,6 +150,12 @@
   boilingPoint: -195.8
   meltingPoint: -210.0
   metabolisms:
+    Poison:
+      effects:
+      - !type:HealthChange
+        damage:
+          types:
+            Cold: 1 # liquid nitrogen is cold
     Gas:
       effects:
       - !type:Oxygenate