Re: New perks
 

I think Cosmic (Rule-exemption: no Limitation cap)( +50%) is a legit option.

Note that in Power-ups: Limitations, the author suggests the -80% limitation is within GM discretion to vary if s/he thinks the result is still reasonable.

Re: New perks
 

Someone had Lactose Intolerance in the Quirks thread, for times and places where tolerance was the norm. That implies for most times and places, you can have this perk:
Lactose Tolerance: Unlike most adults of your background, you can eat dairy products comfortably.

Re: New perks
 

Which is a variant of Immunity (Single Poison) or equivalent to Reduced Consumption 1 (Cast-Iron Stomach).

More generally, the ability to eat "raw" food products that others of your kind can't consume unless they're processed is a Perk. Sort of the opposite of the Restricted Diet disadvantage.

Re: New perks
 

I don't think this is how it should work. There's a reason the value of literacy stopped being context-dependent in 4e.

Re: New perks
 

Where would a lactose tolerant person even get dairy if they're such a rarity in the setting?

Re: New perks
 

There are dairy products that are low in lactose, like yogurt and cheese.

Re: New perks
 

As a lactose-intolerant person, most cheeses aren't low enough to avoid problems. The exceptions are Emmental and other cheeses with interior bubbles. Those have an extra phase of bacterial processing that sweeps up all the lactose.

Re: New perks
 

Those are the cheeses I would expect to find in a lactose-intolerant population. And of course, lactose intolerance isn't an on-or-off switch. You can have different levels of lactase production.

Apparently butter is also low in lactose, which makes sense.

Re: New perks
 

You could have a situation where cattle have recently been introduced as livestock - perhaps from a foreign nation. They can be useful for traction as well as meat, which a lactose-intolerant culture could make use of right away, and as noted there are dairy products that lack sufficient levels of lactose to cause problems. A character with the Lactose Tolerant Perk can drink milk straight without it needing to be processed first, so that's an additional potentially-cheaper source of calories if they're near a farm (or possibly if trading with merchants from that lactose-tolerant nation, provided there are means available to stop the milk from spoiling too quickly).

Re: New perks
 

Which is pretty much how the trait became prevalent in parts of the world.