Yes, well, as they say, "pick your poison carefully." You will embody that poison. If it doesn't kill you immediately. And really, the poison that doesn't kill you at first taste, or kills you slowly, over time, is just as deadly as the stuff that drops you down dead on the spot.
The definition of poison - "a substance with an inherent property that tends to destroy life or impair health." And "something harmful, or pernicious, as to happiness or well-being."
Yes, much of our "nourishment" and "entertainment," and human company is a certain kind of poison too. So you must tread carefully. I don't mean you that you should be timid, or fearful; just on guard, careful, and vigilant.
Yesterday I saw the effects of a slow-motion poisoning, of the head, of the body, of the spirit. It's a sad, debilitating thing. And it's happening all around us, all the time. And we are all subject to the effects. You can get a "contact" poisoning too. And it's easy to over-look, or down-play, or outright ignore. Denial is such a powerful tool and poison too.
Best to keep your eyes peeled. And be sort of stingy on the things you take into yourself.