Bionic stomach

A bionic stomach is an organ replacement that has 125% efficiency, and increases metabolism by 12.5% (metabolism is the average of stomach and liver efficiency).

Acquisition

Bionic stomachs can be crafted at a Fabrication bench once the Bionic replacements research project has been completed. They require 10 Plasteel, 3 Advanced components, 26,000 ticks (7.22 mins) of work, and a Crafting skill of 8.

They can also be bought from exotic traders, Empire traders, and at Outlander faction bases. They are also sometimes offered as a quest reward.

Summary

Body part

A bionic stomach replaces the user's organic stomach. The bionic stomach has a part efficiency of 125%. This not only fully replaces the functionality of a normal stomach - when coupled with the stomach body part having a Metabolism importance of 50%, it results in an increase in metabolism of +12.5% over natural. Metabolism, in turn, improves the rest rate multiplier by +3.75%, meaning the colonist will require slightly less sleep.

Eating capacity, eating speed, and food poisoning chances are unaffected.

Other effects

Additionally, all artificial stomachs are immune to gut worms, and installing one will instantly cure the disease. Unlike the Royalty DLC stomach replacements, EMPing a pawn with a bionic stomach will not force them to vomit.

Installation

Installing a bionic stomach requires 2,500 ticks (41.67 secs) of work, 2x medicine of ??^{[What Quality]} quality or better, and a Medical skill of 5.

Removing a bionic stomach requires 2,500 ticks (41.67 secs) of work, 1x medicine of ??^{[What Quality]} quality or better, and a Medical skill of ?.

If the operation fails, the part has a chance^{[What Chance?]} to be destroyed.

Analysis

Of the bionic-level parts in the game, the bionic stomach offers one of the weakest improvements to a pawn. It gives a 3.75% increase in sleep efficiency, or, for a standard 8 hour sleep cycle, a savings of just over 17 minutes/day - a 1.8% increase in waking hours/day. Gut worms aren't often a major threat for a colony that can make or buy bionic parts. But as there's still an improvement, spare bionic stomachs are still worth installing (unlike functionally equivalent "replacements" like the bionic spine).

The bionic heart is superior to the stomach, as it improves sleep efficiency by 8%, but is slightly more expensive. However, both bionic hearts and stomachs can be used together. A stomach is still cheaper than a royal bed, and doesn't have the massive power costs of a sleep accelerator. All four options do not conflict with each other; the only downside is cost.

Stomach comparisons

The Royalty DLC introduced a number of Stomach replacements with their own advantages and disadvantages. All three of these variants include the benefits offered by the bionic stomach in addition to their unique benefits however they are also susceptible to EMP, causing the pawn to vomit uncontrollably for a short length of time.

Sterilizing Stomach

In addition to the normal benefits of a bionic stomach, the sterilizing stomach eliminates the risk of food poisoning at the cost of vulnerability to EMP.

Reprocessor Stomach

In addition to the normal benefits of a bionic stomach, the reprocessor stomach reduces the amount of food a pawn requires by 25% at the cost of vulnerability to EMP.

Nuclear Stomach

The nuclear stomach combines the benefits of all other stomachs and reduces the amount of food a pawn requires by a whopping 75%, at the cost of vulnerability to EMP and inflicting torso cancer on average once 120 in-game days.

Stomach	Cost	Digestion	Hunger Rate	Food poisoning	Side effects	Market Value
Stomach	-	1x	1x			-
Bionic stomach	10+ 3	1.125x	1x	×50%		785
Sterilizing stomach	15+ 4	1.125x	1x			1,030
Reprocessor stomach	15+ 4	1.125x	0.75x			1,030
Nuclear stomach	15+ 4	1.125x	0.25x		Carcinoma	1,030
Fleshmass stomach	-	1x	1x		+8% Pain	??^{[Detail needed]}