diff --git a/GainStation13/code/datums/diseases/advance/symptoms/berry.dm b/GainStation13/code/datums/diseases/advance/symptoms/berry.dm
new file mode 100644
index 00000000..59a232f3
--- /dev/null
+++ b/GainStation13/code/datums/diseases/advance/symptoms/berry.dm
@@ -0,0 +1,91 @@
+/datum/symptom/berry
+	name = "Berrification"
+	desc = "The virus causes the host's biology to overflow with a blue substance. Infection ends if the substance is completely removed from their body, besides ordinary cures."
+	stealth = -5
+	resistance = -4
+	stage_speed = 1
+	transmittable = 6
+	level = 7
+	severity = 5
+	base_message_chance = 100
+	symptom_delay_min = 15
+	symptom_delay_max = 45
+	threshold_desc = list(
+		"Stage Speed" = "Increases the rate of liquid production.",
+	)
+	var/datum/reagent/infection_reagent = /datum/reagent/berry_juice_infection
+
+/datum/symptom/berry/Start(datum/disease/advance/A)
+	if(!..())
+		return
+	if(A.affected_mob?.client?.prefs?.blueberry_inflation)
+		A.affected_mob.reagents.add_reagent(infection_reagent, max(1, A.properties["stage_rate"]) * 10)
+	..()
+
+/datum/symptom/berry/Activate(datum/disease/advance/A)
+	if(!..())
+		return
+	var/mob/living/carbon/M = A.affected_mob
+	if(!(M?.client?.prefs?.blueberry_inflation))
+		return
+	if(M.reagents.get_reagent_amount(infection_reagent) <= 0)
+		A.remove_disease()
+	switch(A.stage)
+		if(1, 2, 3, 4)
+			if(prob(base_message_chance))
+				to_chat(M, "<span class='warning'>[pick("You feel oddly full...", "Your stomach churns...", "You hear a gurgle...", "You taste berries...")]</span>")
+		else
+			to_chat(M, "<span class='warning'><i>[pick("A deep slosh comes from inside you...", "Your mind feels so light...", "You think blue really suits you...", "Your skin feels so tight...")]</i></span>")
+			M.reagents.add_reagent(infection_reagent, max(A.properties["stage_rate"], 1))
+
+/datum/reagent/berry_juice_infection
+	name = "Blueberry Juice"
+	description = "Totally infectious."
+	reagent_state = LIQUID
+	metabolization_rate = 0.25 * REAGENTS_METABOLISM
+	color = "#0004ff"
+	var/picked_color
+	var/list/random_color_list = list("#0058db","#5d00c7","#0004ff","#0057e7")
+	taste_description = "blueberry pie"
+	var/no_mob_color = FALSE
+	value = 10	//it sells. Make that berry factory
+
+/datum/reagent/berry_juice_infection/on_mob_add(mob/living/L, amount)
+	if(iscarbon(L))
+		var/mob/living/carbon/affected_mob = L
+		if(!(affected_mob?.client?.prefs?.blueberry_inflation))
+			affected_mob.reagents.remove_reagent(/datum/reagent/berry_juice_infection, volume)
+			return
+		picked_color = pick(random_color_list)
+		affected_mob.fat_hide(affected_mob.fatness_real + ((3 * (volume * volume))/50), src)
+	else
+		L.reagents.remove_reagent(/datum/reagent/berry_juice_infection, volume)
+	..()
+
+/datum/reagent/berry_juice_infection/on_mob_life(mob/living/carbon/M)
+	if(!(M?.client?.prefs?.blueberry_inflation))
+		M.reagents.remove_reagent(/datum/reagent/berry_juice_infection, volume)
+		return
+	if(!no_mob_color)
+		M.add_atom_colour(picked_color, WASHABLE_COLOUR_PRIORITY)
+	M.fat_hide(M.fatness_real + ((3 * (volume * volume))/50), src)
+	M.adjust_fatness(1, FATTENING_TYPE_CHEM)
+	..()
+
+/datum/reagent/berry_juice_infection/on_mob_delete(mob/living/L)
+	if(!iscarbon(L))
+		return
+	var/mob/living/carbon/C = L
+	C.fat_show()
+
+/obj/item/reagent_containers/glass/attack(mob/M, mob/user, obj/target)
+	if(M.reagents.get_reagent_amount(/datum/reagent/berry_juice_infection) > 0 && (reagents.total_volume + min(amount_per_transfer_from_this, 10)) <= volume)
+		reagents.add_reagent(/datum/reagent/berry_juice_infection, min(10, amount_per_transfer_from_this))
+		M.reagents.remove_reagent(/datum/reagent/berry_juice_infection, min(10, amount_per_transfer_from_this))
+		if(M != user)
+			to_chat(user, "<span class='warning'>You juice [M.name]...</span>")
+			to_chat(M, "<span class='warning'>[user.name] juices you...</span>")
+		else
+			to_chat(user, "<span class='warning'>You get some juice out of you...</span>")
+		return
+	..()
diff --git a/GainStation13/code/modules/client/preferences/preferences.dm b/GainStation13/code/modules/client/preferences/preferences.dm
index c104c18a..3a3e920c 100644
--- a/GainStation13/code/modules/client/preferences/preferences.dm
+++ b/GainStation13/code/modules/client/preferences/preferences.dm
@@ -13,6 +13,8 @@
 	var/weight_gain_magic = FALSE
 	///Weight gain from viruses
 	var/weight_gain_viruses = FALSE
+	///Blueberry Inflation
+	var/blueberry_inflation = FALSE
 	///Extreme weight gain
 	var/weight_gain_extreme = FALSE
 	///stuckage
diff --git a/code/__HELPERS/global_lists.dm b/code/__HELPERS/global_lists.dm
index c94989ca..96e2798b 100644
--- a/code/__HELPERS/global_lists.dm
+++ b/code/__HELPERS/global_lists.dm
@@ -55,7 +55,7 @@
 	init_sprite_accessory_subtypes(/datum/sprite_accessory/vagina, GLOB.vagina_shapes_list)
 	init_sprite_accessory_subtypes(/datum/sprite_accessory/breasts, GLOB.breasts_shapes_list)
 	GLOB.breasts_size_list = list ("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o") //We need the list to choose from initialized, but it's no longer a sprite_accessory thing.
-	GLOB.genital_fluids_list = list ("Milk", "Water", "Semen", "Femcum", "Honey", "Strawberry Milk", "Nutriment")
+	GLOB.genital_fluids_list = list ("Milk", "Water", "Semen", "Femcum", "Honey", "Strawberry Milk", "Nutriment", "Berry Juice")
 	GLOB.gentlemans_organ_names = list("phallus", "willy", "dick", "prick", "member", "tool", "gentleman's organ", "cock", "wang", "knob", "dong", "joystick", "pecker", "johnson", "weenie", "tadger", "schlong", "thirsty ferret", "baloney pony", "schlanger")
 	for(var/K in GLOB.breasts_shapes_list)
 		var/datum/sprite_accessory/breasts/value = GLOB.breasts_shapes_list[K]
diff --git a/code/modules/client/preferences.dm b/code/modules/client/preferences.dm
index a04265a6..a33d2a3c 100644
--- a/code/modules/client/preferences.dm
+++ b/code/modules/client/preferences.dm
@@ -895,6 +895,8 @@ GLOBAL_LIST_EMPTY(preferences_datums)
 								dat += "<a style='display:block;width:50px' href='?_src_=prefs;preference=balls_fluid;task=input'>Honey</a>"
 							if(/datum/reagent/consumable/nutriment)
 								dat += "<a style='display:block;width:50px' href='?_src_=prefs;preference=balls_fluid;task=input'>Nutriment</a>"
+							if(/datum/reagent/berry_juice_infection)
+								dat += "<a style='display:block;width:50px' href='?_src_=prefs;preference=balls_fluid;task=input'>Berry Juice</a>"
 							else
 								dat += "<a style='display:block;width:50px' href='?_src_=prefs;preference=balls_fluid;task=input'>Nothing?</a>"
 							//This else is a safeguard for errors, and if it happened, they wouldn't be able to change this pref,
@@ -944,6 +946,8 @@ GLOBAL_LIST_EMPTY(preferences_datums)
 								dat += "<a style='display:block;width:50px' href='?_src_=prefs;preference=breasts_fluid;task=input'>Strawberry Milk</a>"
 							if(/datum/reagent/consumable/nutriment)
 								dat += "<a style='display:block;width:50px' href='?_src_=prefs;preference=breasts_fluid;task=input'>Nutriment</a>"
+							if(/datum/reagent/berry_juice_infection)
+								dat += "<a style='display:block;width:50px' href='?_src_=prefs;preference=balls_fluid;task=input'>Berry Juice</a>"
 							else
 								dat += "<a style='display:block;width:50px' href='?_src_=prefs;preference=breasts_fluid;task=input'>Nothing?</a>"
 							//This else is a safeguard for errors, and if it happened, they wouldn't be able to change this pref,
@@ -1059,6 +1063,7 @@ GLOBAL_LIST_EMPTY(preferences_datums)
 			dat += "<b>Weight Gain - Weapons:</b><a href='?_src_=prefs;preference=weight_gain_weapons'>[weight_gain_weapons == TRUE ? "Enabled" : "Disabled"]</a><BR>"
 			dat += "<b>Weight Gain - Magic:</b><a href='?_src_=prefs;preference=weight_gain_magic'>[weight_gain_magic == TRUE ? "Enabled" : "Disabled"]</a><BR>"
 			dat += "<b>Weight Gain - Viruses:</b><a href='?_src_=prefs;preference=weight_gain_viruses'>[weight_gain_viruses == TRUE ? "Enabled" : "Disabled"]</a><BR>"
+			dat += "<b>Blueberry Inflation:</b><a href='?_src_=prefs;preference=blueberry_inflation'>[blueberry_inflation == TRUE ? "Enabled" : "Disabled"]</a><BR>"
 
 			dat += "<h2>GS13 Gameplay Preferences</h2>"
 			dat += "<b>Stuckage (weight results in getting stuck in doors):</b><a href='?_src_=prefs;preference=stuckage'>[stuckage == TRUE ? "Enabled" : "Disabled"]</a><BR>"
@@ -2391,6 +2396,8 @@ GLOBAL_LIST_EMPTY(preferences_datums)
 							features["balls_fluid"] = /datum/reagent/consumable/pinkmilk
 						if("Nutriment")
 							features["balls_fluid"] = /datum/reagent/consumable/nutriment
+						if("Berry Juice")
+							features["balls_fluid"] = /datum/reagent/berry_juice_infection
 
 				if("egg_size")
 					var/new_size
@@ -2438,6 +2445,8 @@ GLOBAL_LIST_EMPTY(preferences_datums)
 							features["breasts_fluid"] = /datum/reagent/consumable/pinkmilk
 						if("Nutriment")
 							features["breasts_fluid"] = /datum/reagent/consumable/nutriment
+						if("Berry Juice")
+							features["breasts_fluid"] = /datum/reagent/berry_juice_infection
 
 				if("breasts_color")
 					var/new_breasts_color = input(user, "Breast Color:", "Character Preference", "#"+features["breasts_color"]) as color|null
@@ -2633,6 +2642,8 @@ GLOBAL_LIST_EMPTY(preferences_datums)
 					noncon_weight_gain = !noncon_weight_gain
 				if("stuckage")
 					stuckage = !stuckage
+				if("blueberry_inflation")
+					blueberry_inflation = !blueberry_inflation
 				if("max_fatness")
 					var/pickedweight = input(user,
 						"Choose your max fatness level, your weight will not go beyond this. None will let you gain without a limit",
diff --git a/code/modules/client/preferences_savefile.dm b/code/modules/client/preferences_savefile.dm
index 22fea851..4e272785 100644
--- a/code/modules/client/preferences_savefile.dm
+++ b/code/modules/client/preferences_savefile.dm
@@ -159,6 +159,7 @@ SAVEFILE UPDATING/VERSIONING - 'Simplified', or rather, more coder-friendly ~Car
 	S["noncon_weight_gain"] >> noncon_weight_gain
 	S["max_weight"] >> max_weight 
 	S["stuckage"] >> stuckage
+	S["blueberry_inflation"] >> blueberry_inflation
 
 
 	//try to fix any outdated data if necessfary
@@ -300,7 +301,7 @@ SAVEFILE UPDATING/VERSIONING - 'Simplified', or rather, more coder-friendly ~Car
 	WRITE_FILE(S["noncon_weight_gain"], noncon_weight_gain)
 	WRITE_FILE(S["max_weight"], max_weight)
 	WRITE_FILE(S["stuckage"], stuckage)
-
+	WRITE_FILE(S["blueberry_inflation"], blueberry_inflation)
 	return 1
 
 
diff --git a/tgstation.dme b/tgstation.dme
index 2afaf1a7..750db68f 100644
--- a/tgstation.dme
+++ b/tgstation.dme
@@ -3077,6 +3077,7 @@
 #include "GainStation13\code\clothing\head.dm"
 #include "GainStation13\code\clothing\suits.dm"
 #include "GainStation13\code\datums\components\fattening_door.dm"
+#include "GainStation13\code\datums\diseases\advance\symptoms\berry.dm"
 #include "GainStation13\code\datums\mutations\fatfang.dm"
 #include "GainStation13\code\datums\status_effects\fatstun.dm"
 #include "GainStation13\code\game\lore_papers.dm"