How Your Body and Mind Are Intimately Linked Through Your Hormones
Body and Mind
In the book Calm Mind, Healthy Body, we discuss in detail the importance of having a calm mind and we look at how controlling and calming your thoughts can ultimately improve your health by removing the stress response.
But did you know that this also works just as potently the other way around? That is to say that your health can also impact on your stress levels? Even your hunger can impact on stress – which in turn impacts on hunger again. It’s a complex interplay and in a moment, we’ll see more about this works and why your lifestyle is a key factor in controlling your stress.
What Happens When You Eat
If you’re stressed right now, then one method you might be able to use to fix that is to eat more. When you eat, your blood sugar spikes. This is then in turn followed by a spike in insulin, which triggers the body to remove the sugar from the blood along with any nutrients.
If you’ve eaten carbs (which provide the fastest sugar spike) then you will also have tryptophan in the blood. Tryptophan is an amino acid that also happens to be a building block of the neurotransmitter ‘serotonin’. Because tryptophan can cross the brain barrier and because it gets left behind by the insulin response, this then leads to a sudden spike in serotonin in the brain and you feel very good.
This is why you feel in a good mood after you’ve eaten!
What’s more, is that serotonin eventually converts into melatonin – the sleep hormone. That’s why everyone always falls asleep after Christmas dinner!
What Happens When You Get Hungry
But let’s say you haven’t eaten for a while. What happens then?
Well, you now have very low levels of tryptophan in your brain and this in turn increases cortisol – there is no way to impact a single neurotransmitter in isolation; levels of one will always impact on levels of the other.
Cortisol then replaces serotonin and this increases the production of ghrelin – the hunger hormone. That’s what makes your stomach start to rumble. It also increases stress and triggers anxious thoughts. This is why we get ‘hangry’ and why you’re ‘not you when you’re hungry’.
Other Things That Impact on Your Mood
There are plenty of other ways we can impact on our levels of neurotransmitters and hormones too though.
For example, when you wake up first thing in the morning you will have been fasting all through the night. At this point your serotonin levels are incredibly low and you have high cortisol making you stressed. At the same time, the light from the sun also increases the release of cortisol which wakes you up (stress hormones are stimulatory whereas relaxation hormones tend to be sedative). Cortisol removes melatonin from the brain and also widens the veins via nitric oxide.
Then there are other things you can do: exercise for instance is well known to increase serotonin and other endorphins and boost the mood. It’s time to stop thinking of your brain as an isolated thing!