One other 'natural' substance of note - the chemical Psisha Adreemus, which restores 1,000 psionic points per teaspoon and sells for the bargain price of $100,000,000 per pint. There's a flat 35% chance that any given shop has it in stock, no mention of any modifiers for size or class of clientele, so there must be some very good anti-shoplifting security in place all across Synnibarr. And yes, this is the same Psisha Adreemus that was mentioned back as a training tool for the Shadow Masters in Chapter 1; if your character is a Shadow Master, someone was willing to spend a minimum of $1 million on drugs to set you up as an adventurer. No pressure...