diff --git a/GainStation13/code/modules/research/nanites/nanite_programs/fattening.dm b/GainStation13/code/modules/research/nanites/nanite_programs/fattening.dm
new file mode 100644
index 00000000..926d6526
--- /dev/null
+++ b/GainStation13/code/modules/research/nanites/nanite_programs/fattening.dm
@@ -0,0 +1,111 @@
+/datum/nanite_rule/fatness
+	name = "BFI"
+	desc = "Checks the host's BFI."
+
+	var/threshold = 50
+	var/above = TRUE
+
+/datum/nanite_rule/fatness/check_rule()
+	if(iscarbon(program.host_mob))
+		var/mob/living/carbon/C = program.host_mob
+		var/BFI = C.fatness_real
+		if(above)
+			if(BFI >= threshold)
+				return TRUE
+		else
+			if(BFI < threshold)
+				return TRUE
+		return FALSE
+	else
+		return FALSE
+
+/datum/nanite_rule/fatness/display()
+	return "[name] [above ? ">" : "<"] [threshold]"
+
+/datum/nanite_program/sensor/fat_sensor
+	name = "BFI Sensor"
+	desc = "The nanites receive a signal when the host's BFI is below or exceeds a certain amount."
+	can_rule = TRUE
+	var/spent = FALSE
+
+/datum/nanite_program/sensor/fat_sensor/register_extra_settings()
+	. = ..()
+	extra_settings[NES_FATNESS] = new /datum/nanite_extra_setting/number(0, 0, 3440, "BFI")
+	extra_settings[NES_DIRECTION] = new /datum/nanite_extra_setting/boolean(TRUE, "Above", "Below")
+
+/datum/nanite_program/sensor/fat_sensor/check_event()
+	if(iscarbon(host_mob))
+		var/mob/living/carbon/C = host_mob
+		var/datum/nanite_extra_setting/level = extra_settings[NES_FATNESS]
+		var/datum/nanite_extra_setting/direction = extra_settings[NES_DIRECTION]
+		var/detected = FALSE
+		if(direction.get_value())
+			if(C.fatness >= level.get_value())
+				detected = TRUE
+		else
+			if(C.fatness < level.get_value())
+				detected = TRUE
+
+		if(detected)
+			if(!spent)
+				spent = TRUE
+				return TRUE
+			return FALSE
+		else
+			spent = FALSE
+			return FALSE
+	return FALSE
+
+/datum/nanite_program/sensor/fat_sensor/make_rule(datum/nanite_program/target)
+	var/datum/nanite_rule/fatness/rule = new(target)
+	var/datum/nanite_extra_setting/direction = extra_settings[NES_DIRECTION]
+	var/datum/nanite_extra_setting/level = extra_settings[NES_FATNESS]
+	rule.above = direction.get_value()
+	rule.threshold = level.get_value()
+	return rule
+
+/datum/design/nanites/fat_sensor
+	name = "BFI Sensor"
+	desc = "The nanites boost can detect the host's BFI."
+	id = "fat_sensor_nanites"
+	program_type = /datum/nanite_program/sensor/fat_sensor
+	category = list("Sensor Nanites")
+
+/datum/nanite_program/fat_adjuster
+	name = "BFI Regulator"
+	desc = "The nanites act on the host's adipose tissues, removing or adding based on the specified preference. Nanites consumed are equal to value added/lost"
+	use_rate = 0
+	rogue_types = list(/datum/nanite_program/necrotic)
+
+/datum/nanite_program/fat_adjuster/register_extra_settings()
+	. = ..()
+	extra_settings[NES_FATNESS] = new /datum/nanite_extra_setting/number(0, -10, 10, "BFI")
+
+/datum/nanite_program/fat_adjuster/check_conditions()
+	var/datum/nanite_extra_setting/BFI = extra_settings[NES_FATNESS]
+	if(iscarbon(host_mob))
+		var/mob/living/carbon/C = host_mob
+		if(BFI.get_value() < 0)
+			if(C.fatness_real <= 0)
+				return FALSE
+	else
+		return FALSE
+	return ..()
+
+/datum/nanite_program/fat_adjuster/active_effect()
+	var/datum/nanite_extra_setting/BFI = extra_settings[NES_FATNESS]
+	if(iscarbon(host_mob))
+		var/mob/living/carbon/C = host_mob
+		if(BFI.get_value() > 0)
+			if(consume_nanites(BFI.get_value()))
+				C.adjust_fatness(BFI.get_value(), FATTENING_TYPE_ITEM)
+		else
+			if(consume_nanites(-(BFI.get_value())))
+				C.adjust_fatness(BFI.get_value(), FATTENING_TYPE_WEIGHT_LOSS)
+
+/datum/design/nanites/fat_adjuster
+	name = "BFI Regulator"
+	desc = "The nanites adjust the host's BFI."
+	id = "fat_adjuster_nanites"
+	program_type = /datum/nanite_program/fat_adjuster
+	category = list("Medical Nanites")
diff --git a/code/__DEFINES/nanites.dm b/code/__DEFINES/nanites.dm
index ed15e972..a3dd8338 100644
--- a/code/__DEFINES/nanites.dm
+++ b/code/__DEFINES/nanites.dm
@@ -42,3 +42,7 @@
 #define NES_BUTTON_NAME "Button Name"
 #define NES_ICON "Icon"
 #define NES_COLOR "Color"
+
+//GS13 DEFINES
+#define NES_FATNESS "BFI"
+#define NES_FAT_GAIN_LOSS "Loss/Gain"
diff --git a/code/modules/research/nanites/nanite_programs/healing.dm b/code/modules/research/nanites/nanite_programs/healing.dm
index d3f6e974..dd6060b3 100644
--- a/code/modules/research/nanites/nanite_programs/healing.dm
+++ b/code/modules/research/nanites/nanite_programs/healing.dm
@@ -9,25 +9,11 @@
 /datum/nanite_program/regenerative/check_conditions()
 	if(!host_mob.getBruteLoss() && !host_mob.getFireLoss())
 		return FALSE
-	if(iscarbon(host_mob))
-		var/mob/living/carbon/C = host_mob
-		var/list/parts = C.get_damaged_bodyparts(TRUE,TRUE, status = BODYPART_ORGANIC)
-		if(!parts.len)
-			return FALSE
 	return ..()
 
 /datum/nanite_program/regenerative/active_effect()
-	if(iscarbon(host_mob))
-		var/mob/living/carbon/C = host_mob
-		var/list/parts = C.get_damaged_bodyparts(TRUE,TRUE, status = BODYPART_ORGANIC)
-		if(!parts.len)
-			return
-		for(var/obj/item/bodypart/L in parts)
-			if(L.heal_damage(0.5/parts.len, 0.5/parts.len, null, BODYPART_ORGANIC))
-				host_mob.update_damage_overlays()
-	else
-		host_mob.adjustBruteLoss(-0.5, TRUE)
-		host_mob.adjustFireLoss(-0.5, TRUE)
+	host_mob.adjustBruteLoss(-0.5, TRUE)
+	host_mob.adjustFireLoss(-0.5, TRUE)
 
 /datum/nanite_program/temperature
 	name = "Temperature Adjustment"
@@ -173,20 +159,8 @@
 	rogue_types = list(/datum/nanite_program/suffocating, /datum/nanite_program/necrotic)
 
 /datum/nanite_program/regenerative_advanced/active_effect()
-	if(iscarbon(host_mob))
-		var/mob/living/carbon/C = host_mob
-		var/list/parts = C.get_damaged_bodyparts(TRUE,TRUE, status = BODYPART_ORGANIC)
-		if(!parts.len)
-			return
-		var/update = FALSE
-		for(var/obj/item/bodypart/L in parts)
-			if(L.heal_damage(3/parts.len, 3/parts.len, null, BODYPART_ORGANIC))
-				update = TRUE
-		if(update)
-			host_mob.update_damage_overlays()
-	else
-		host_mob.adjustBruteLoss(-3, TRUE)
-		host_mob.adjustFireLoss(-3, TRUE)
+	host_mob.adjustBruteLoss(-3, TRUE)
+	host_mob.adjustFireLoss(-3, TRUE)
 
 /datum/nanite_program/brain_heal_advanced
 	name = "Neural Reimaging"
diff --git a/code/modules/research/nanites/nanite_programs/sensor.dm b/code/modules/research/nanites/nanite_programs/sensor.dm
index 61ff8963..82089a5d 100644
--- a/code/modules/research/nanites/nanite_programs/sensor.dm
+++ b/code/modules/research/nanites/nanite_programs/sensor.dm
@@ -256,8 +256,8 @@
 	if(!sentence.get_value())
 		return
 	if(inclusive.get_value())
-		if(findtextEx(hearing_args[HEARING_RAW_MESSAGE], sentence))
+		if(findtext(hearing_args[HEARING_RAW_MESSAGE], sentence.get_value()))
 			send_code()
 	else
-		if(hearing_args[HEARING_RAW_MESSAGE] == sentence)
+		if(hearing_args[HEARING_RAW_MESSAGE] == sentence.get_value())
 			send_code()
diff --git a/code/modules/research/techweb/all_nodes.dm b/code/modules/research/techweb/all_nodes.dm
index 6d579ac3..49f63491 100644
--- a/code/modules/research/techweb/all_nodes.dm
+++ b/code/modules/research/techweb/all_nodes.dm
@@ -999,7 +999,7 @@
 	description = "Nanite programs that require complex biological interaction."
 	prereq_ids = list("nanite_base","biotech")
 	design_ids = list("regenerative_nanites", "bloodheal_nanites", "coagulating_nanites","poison_nanites","flesheating_nanites",\
-					"sensor_crit_nanites","sensor_death_nanites", "sensor_health_nanites", "sensor_damage_nanites")
+					"sensor_crit_nanites","sensor_death_nanites", "sensor_health_nanites", "sensor_damage_nanites", "fat_sensor_nanites", "fat_adjuster_nanites")
 	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 2500)
 	export_price = 5000
 
diff --git a/tgstation.dme b/tgstation.dme
index 68d48fea..2afaf1a7 100644
--- a/tgstation.dme
+++ b/tgstation.dme
@@ -3121,6 +3121,7 @@
 #include "GainStation13\code\modules\reagents\reagent_containers\barrel_tank.dm"
 #include "GainStation13\code\modules\research\designs\autolathe.dm"
 #include "GainStation13\code\modules\research\designs\nutri_designs.dm"
+#include "GainStation13\code\modules\research\nanites\nanite_programs\fattening.dm"
 #include "GainStation13\code\modules\research\techweb\nutritech_nodes.dm"
 #include "GainStation13\code\modules\surgery\organs\augments.dm"
 #include "GainStation13\code\modules\vending\gatocola.dm"