Vegans are always being warned of the dangers of being vitamin B12 deficient, but how common is the deficiency and what impact can it have on fitness goals? SWTC investigates. We and our 45 ...

Although we may not always be accurate in our guesses, our bodies are always alerting us when they are deficient in certain vitamins ... getting a good night's sleep, are you still tired?

Vitamin B12: More common in older people, tiredness is a symptom of B12 or folate anaemia, but it's usually caused by absorption issues. Always consult a doctor if you are feeling tired to rule ...