Tired all the time? The 3 subtle warning signs to look out for in your mouth or risk life-threatening heart problems

IT’s dark when you wake up in the morning and it’s pitch black by the time you get home from work, so it’s no wonder you feel tired all the time.

But something far more serious than the weather could be causing your fatigue.

Nutrient deficiencies you didn’t know you had could be sapping your energy and putting you at risk of serious complications, experts warn.

While headaches and heart palpitations can be symptoms, you can also spot several tell-tale warning signs in your mouth.