I'm always tired and fall asleep when I sit down. I can sleep anywhere and, in the car when I'm a passenger, I can feel a wave of tiredness come over me. I had various blood tests done a few months ago but they all came back clear. What do you suggest? I am 47 and otherwise healthy.

If the doctors can find no medical reason for your tiredness, I would try to implement some lifestyle and dietary changes to improve the situation.

So, first of all, make sure you are getting plenty of energy-rich foods in your diet, such as nuts and seeds, leafy green veg, fruit, wholegrains, beans and lentils. It also very important to stay hydrated by drinking 1.5-2 litres of water a day (teas and coffee don't count!) as low energy can be a sign of dehydration. A little exercise can also be good for energy levels.

On top of this, you could add in some Balance Mineral Drink to your routine. This contains magnesium, which can aid energy levels, as well as other nutrients like zinc, calcium and vitamin D. You could take this in a little water when you are feeling most tired.

Let me know if you have tried any of these things already, and we can have another think. If not, it's worth trying out these tips to see if they make a difference.

It's also worth bearing in mind that the menopause can lead to women feeling drained of energy. It is not clear why this is the case, but one explanation is that your body is working hard to deal with the hormonal changes, and that means you have less energy for other things. If you think your body could be preparing or this change, it is worth considering whether this could be at the root of your symptoms.

I hope you find this information helpful and do get in touch if you have any more questions.