Something else I've picked up from the reading list that points to having proper diet, herbal medicines, et cetera, helping us against higher dimensional interference comes from something I've read in ISOTM and parts of The Fourth Way, by Ouspensky (he alluded to it in the ISOTM, but managed to explain more of it in Fourth Way, FWIW). The books said that when a cosmos/density attempts to alter or affect the cosmos below it, it must act through the cosmos below the cosmos it wishes to affect. If we take the cosmi to be densities, then that would be like saying if Fourth Density (active component) wishes to affect something in Third Density (passive component), then the Second Density acts as the neutralizing component in the interaction. Basically, Fourth Density affects Third through the Second. I think this is collinear with the idea that 4th density STS forces stalk and manipulate humanity by polluting our DNA with viral infections and epigenetic dysregulation via improper diet.
Using this same model, to "fight back" as a Third Density denizen defending against Fourth Density harassment, we need to take back control of our genetic expression. In essence that means we need to detoxify ourselves of pollution of all types, restore our diet to what we're genetically optimized for using, and have a body/mind practice like EE, meditation, yoga, dancing, et cetera, which probably alters our DNA as well. What this amounts to is us "taking back" Second Density, and helping to prevent Fourth Density from affecting it in such a way that we can be controlled in Third Density. If that makes any sense....