For those interested in SHTF scenarios, herbal medicine can be a lot less complex than you think. For ~some~ health issues it is perfectly viable and its also a way to get a variety of vitamins and minerals that are somewhat difficult to get otherwise unless you stock up on them and carry them with you.
It can't replace antibiotics (actually, for some ailments, it can) and the like but a little knowledge goes a loooooong way towards self sufficiency. Its the kind of stuff every hunter and hiker should know anyway in case they get injured or lost (or lost AND injured) out in the bush.
Stuff like Kukui nut hull sap is a good cough and cold remedy. The sap of honohono grass (with completely green stems, not the ones that have purple in them) will quickly stop the bleeding of minor cuts and speed the healing of the wound. Got any kind of lung infection and have access to fresh garlic? Pound that stuff! Its antiviral and antibacterial and is most effective in lung ailments. It also works directly - you can put a thin slice of garlic directly on a small wound to sterilize it if you have no antibiotic ointment.
No, not as good as modern medicines but way better than nothing if you have no modern medicine.
And when we talk about having stuff to barter if the SHTF... knowledge is some of the most handy stuff to have. Weighs nothing, takes up no space and it makes people want to have you around.
