You're twelve days into 'New Year New You', and you're not feeling too fresh.
Sounds familiar. While some negative reactions to a new health kick can actually be positive signs that your body is detoxing, there are other signs that may not be so promising.
Any new diet takes time to adjust to, and it's around now that you'll start to see the effects of your new plan and whether it's working for you or not.
We all know the obvious signs like weight loss or an increase in energy, but if you're not eating enough your body has a way of telling you.
Dr Petra Simic of Bupa Health Clinics told Cosmopolitan that bad breath could mean you're not properly nourished.
She said: "When the body does not have enough glucose for energy, it burns stored fats instead, resulting in a build-up of acids called ‘ketones’.
"It’s these ketones which can make your breath smell bad, a bit like nail polish remover."
How do you combat this? Simples. Eat more.
The doctor went on:
"Increasing your portion sizes so that you’re getting your required energy levels should resolve the problem."
Pass the pasta.