More Scientific Evidence That Beliefs Affect Biology

If you’ve been following me since I started writing on the internet a couple of years ago, you know that I have a certain soft spot for the power of belief (sampling: here, here, here, and here). I understand that many folks are still leery of that phrase, but when you couch it in the context of the “placebo effect,” it’s amazing how many people begin to accept it as a thing.

Depending upon your philosophical bent, you may believe that willpower is a depletable resource. You certainly wouldn’t be alone in that thought, as President Obama seems to subscribe to this point of view. There are also those who believe that willpower is not a limited resource. So, which one is it? A simple question without a simple answer. It’s important to remember that depending upon from which point we begin, we may be less inclined to believe the other side of the story (remember the confirmation bias?) As much as possible, it’s important to try to take in new information with an open mind. With that being said, (regardless of where you stand), try to examine the following study with an objective and critical eye.

…following a demanding task, only people who view willpower as limited and easily depleted (a limited resource theory) exhibited improved self-control after sugar consumption. In contrast, people who view willpower as plentiful (a nonlimited resource theory) showed no benefits from glucose—they exhibited high levels of self-control performance with or without sugar boosts. Additionally, creating beliefs about glucose ingestion (experiment 3) did not have the same effect as ingesting glucose for those with a limited resource theory.

When I read this, my first thought was, as the title suggests, more evidence that our beliefs can affect our biology (see: Biology of Belief). Of course, I understand if some folks have a hard time jumping on board with this, so, like I said, couching it in the language of the “placebo effect” seems to make it more palatable.


After reading this, I’d encourage you to follow-through with application. That is, now that you have this knowledge, apply it to your own life. Test it out. See what works for you. Maybe you used to believe that willpower was a limited resource, but after reading this, think the opposite. It’s certainly worth taking a chance, right?


One response to “More Scientific Evidence That Beliefs Affect Biology

  1. Pingback: They Limped in and Danced Out: Choices and Illusions, Part 1 | Jeremiah Stanghini

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