Hemogen pack

Hemogen packs are a type of food added by the Biotech DLC. It acts as a form of blood that can be used for blood transfusions, or consumed by those with the Hemogenic gene to restore their Hemogen need.
== Acquisition == 
Hemogen packs can be extracted from non-hemogenic humans with the Extract Hemogen Pack operation. This takes of work and increases their blood loss by 45%; if blood loss exceeds 100%, then the pawn will die. Unlike most other operations, it does not consume medicine or anesthetise the subject. It does still provide Medical experience however.
This operation is considered a violation for faction relations, when done on a guest or ally. 
* Extracting hemogen from a prisoner of a hostile faction lowers reputation by 1.
* Extracting hemogen from a guest of a friendly faction faction lowers reputation by 5 and immediately fails the associated quest.
Prisoners can be designated to have extraction operations automatically queued up when their blood loss reaches 0% via the Hemogen farm interaction option.
== Summary ==
Hemogen is a packaged form of blood that can be extracted and implanted to alter a human pawn's blood loss. 
Any pawn can consume one for a measily nutrition. Those without either a Hemogen need, the Cannibal trait, or a pro-Cannibalism ideoligion get a . Conceited nobles also dislike consuming hemogen packs, and will receive a upon consumption, even if that noble has a Hemogen need. Consuming a pack in this way will not restore any blood loss.
When consumed by Hemogenic pawns, each pack satisfies the Hemogen need by . This is sufficient to satisfy 2 days of hemogen need for pawns with the Hemogen drain gene, including Sanguophages, and 10 days for those who just have Hemogenic, assuming no hemogenic abilities are used during these periods. 
Pawns will automatically consume hemogen packs to reach their target hemogen level if the toggle on their hemogen gizmo is enabled. See Hemogen for details. Additionally doctors can be ordered to feed patients hemogen to restore hemogen so long as the hemogenic pawn is under the target level. Note that this can be done even when hemogen packs are disallowed by the patient's food policy. 
Hemogen packs do not rot, but do deteriorate by being left outdoors or in otherwise rough conditions.
Hemogen packs are also used in the construction and fueling of the following deathrest buildings:
=== Blood transfusion ===
Hemogen packs can be used to perform the "Blood transfusion" operation on pawns, which restores a pawn's blood loss. The operation consumes hemogen packs, takes of work, and reduces blood loss by per pack. It always fully recovers blood loss, taking as many hemogen packs as needed, and if fewer packs are available, the operation cannot be performed at all; it's all or nothing. It is currently unknown whether this is a bug. This surgery does not require medicine or a minimum Medical skill, does not anesthetise the subject, and always succeeds. Operation duration and, consequently, Medical experience gain don't depend on the quantity of packs used.
When a hemogenic pawn is transfused, they receive the same per pack as if they had consumed them. For example, a pawn with blood loss would be transfused with 2 hemogen packs, dropping to only blood loss and gaining hemogen. As such, if a pawn is subject to both blood loss and hemogen need, transfusing is strictly superior to allowing them to consume the pack, time and workload permitting. 
==== Efficiency ====
The blood loss recovered is less than the lost from creating the pack.
Since as many hemogen packs are used as needed to fully recover from blood loss, some healing potential is always wasted. Pawns die at blood loss, so if 3 packs () are used, at least is wasted. The number of required packs is calculated when the doctor decides or is ordered to start the operation, and if blood loss subsequently recovers naturally, passing or threshold before the end of operation, the calculated amount is consumed, nonetheless. Like most numbers in the game, the blood loss percentage displayed in the ailment's tooltip is a rounded value of an actual floating-point number used internally. So, the actual / threshold is in the midpoint of the timespan during which the corresponding / tooltip is displayed, from the beginning.
== Analysis ==
Hemogen packs can be used to buy extra time in the event of extreme blood loss if there is roughly around 2 or more hours left until death otherwise by the time a hemogen pack is brought to a patient and installed, a doctor could've used medicine to reduce/stop the bleeding. In addition, tending can be done on the field, while operations must be done on a bed or sleeping spot. For non-hemogenic pawns, hemogen packs can be used to cure extreme blood loss once all wounds have been tended - this causes the pawn to be conscious faster. For hemogenic pawns, it has an obvious use in keeping their need satiated.
Hemogen farms have a niche in increasing Medical experience. Make the operation as slow as possible, such as turning off the lights, to gain more XP. You may want to manually order operations instead of using the "Hemogen Farm" setting, so you can control which pawn is trained.
=== Hemogen ===
Compared to bloodfeeding:
* Hemogen packs give the same base Hemogen and blood loss.
* Hemogen pack extraction does not upset pawns, without requiring the Bloodfeeders precept, or cause pain.
* Hemogen packs can be stored and transported and even kept on the hemogenic pawn, independent of having a pawn to feed from at the time of consumption. This allows topping up in-combat, while caravanning, or just building up a stockpile in case of a prisoner escape or death, without having to feed on your own colonists.
* Extracting hemogen packs trains medical experience.
* The bloodfeeder gene has a cost of metabolic efficiency. Note that this isn't a choice with Sanguophages, who already come with this gene.
* Hemogen packs are more efficient when harvesting from children. Bloodfeeders will receive less hemogen (for the same blood loss) when feeding on a child, due to their smaller body size. However, when extracting a hemogen pack, a child will give an adult-sized pack.
* Bloodfeeding is somewhat faster. A doctor needs to operate on a patient in order to extract a hemogen pack, and this process takes a bit of work.
* Conceited nobles dislike consuming hemogen packs, but don't mind bloodfeeding.
=== Extraction strategies ===
As:
* A hemogen pack gives hemogen
* Extracting a hemogen pack causes blood loss
* Blood loss recovers at per day
You can safely extract 1 pack every days, or making hemogen a day, capable of supporting sanguophages pawns or hemogenic pawns. Note that this is with optimum timing and therefore represents a theoretical maximum gain - actual extractions may not occur so promptly.
Prisoners make ideal sources of hemogen - the risk of death and statistical impact from blood loss is not important and the extraction can be completely automated. Long term prisoners can cause problems however. Pawns with the dead calm gene, such as genies, are ideal as they can feed and clothe themselves but will never harm other prisoners or attempt a prison break. Their mood becomes largely unimportant at that point, and they can be fed using a nutrient paste dispenser in their prison for maximum nutritional and colonist work efficiency. You may also choose to give them genes that improve their metabolic efficiency, to further cut costs. 
If a dead calm pawn is not available, you can also remove a prisoners legs by installing and removing peg legs. They will need to be manually fed by a colonist but they can never escape.
The hemogen farm prisoner option will not keep prisoners unconscious, and will instead wait until they have recovered all bloodloss before performing another extraction. The player can manually schedule extractions to whenever the pawn is below 55% blood loss. This will cause the prisoner to fall unconscious until they again decrease to below 60% bloodloss. In this way, a prisoner can be kept unconscious for up to a theoretical maximum of of the time, significantly reducing prison and mental breaks.
== Gallery ==
HemogenPack a.png|One pack
HemogenPack b.png|Partial stack
HemogenPack c.png|Full stack
== Version history ==
* Biotech DLC Release - Added
* 1.4.3530 - Added a toggle to the hemogen gizmo which allows configuration of whether or not a pawn can ingest hemogen packs to satisfy the desired hemogen level.
* 1.4.3541 - Extracting hemogen no longer requires medicine (previously: 2x herbal or better) and does not anesthetize the target. Medical experience also reduced.
* 1.4.3555 - Reduced the work needed for the extract hemogen operation to 500 from 1500. Fix: Bloodfeeders sometimes do not ingest all taken hemogen packs, depending on food need level. Added a toggle to the hemogen gizmo which allows configuration of whether or not a pawn can ingest hemogen packs to desired hemogen level - Note this is essentially a duplicate of the change from 1.4.3530, it is currently unclear whether this is an error, whether there is a difference, or whether the change was reverted and re-added latter.
* 1.4.3563 - Fix: Sanguophages can take too many hemogen packs for maintaining hemogen levels in some circumstances.
* 1.4.3580 - Fix: Hemogen packs give "ate vegetarian" mood.
Category: Food