This is quite a simple thing, but it worth doing it.
You take a litter of distilled vinegar, and you put some good cooking herbs in it,
from the garden it's better !
I took 21 flower of chamomile, 1 rose, some rosemary, thyme, lemon thyme, some pine needles, some leaves of absinthe, laurel, eucapyltus, and melissa.
I put to circulate 40°C for some hours and then exposed to the sun.
Filter and take a spoon everyday, fool of good things !