"Some herbs such as the berberine herbs (goldenseal, barberry, Oregon grape root, coptis, etc.) will kill the flora."
What I take:
Planetary Herbs Digestive Grape Bitters
Proprietary Extract Blend: Gentian Root, Angelica Root, Astragalus Root, Bai-Zhu Atractylodes Rhizome, Dill Fruit, Goldenseal Root, Juniper Berry, Oregon Grape Root, Yerba Santa Leaf, Cardamom Seed, Yarrow Flowering Tops, Coriander Seed, Galangal Rhizome, Ginger Root, with essential oils of Anise Fruit and Sweet Orange.
So am I killing my flora ... flora I am trying very hard to replenish and mulitiply in my gut???
One of the reasons that I say to ignore the directions of a spoon full on bottles of bitters and recommend a 1/2 dropper full instead is because the tiny amount of berberine in a 1/2 dropper full will have a negligible effect on the flora. The same applies to the stimulant laxatives found in a lot of bitters such as senna and cascara sagrada.