B vitamins are found naturally in meat, fish, fruit, vegetables and nuts and cereals. My favourite sources are 'Marmite' and Rice Crispies.

The B vitamins help the body to maintain a healthy blood supply and nervous system. They help give you to get energy from your food, and maintain that vitality that gives you 'bounce'. If your 'get up and go has got up and went' this could be what you need.

Vitamin B6 is mainly involved in maintaining the health of the body and keeping it going when it is under attack, or stressed, from illness, dieting, or pregnancy. Mouth ulcers are often a symptom of low vitamin B6 levels.

B6 is said to reduce stress and is particularly effective for PMS and when taking oral contraceptives.

It is also vital in the production of healthy blood cells, antibodies that fight infection, and in the maintenance of a healthy nervous system.

B6 also helps the body to break down and make efficient use of carbo-hydrates and fat during digestion.

You can help to keep your energy and immune systems in peak condition during winter by taking brewers yeast which is available from large chemists like Boots, or taking vitamin B tablets.

Brewers Yeast is quite cheap in comparison with purpose made and labelled vitamin B tablets.

Vitamin B from Holland & Barrett cost me £8.99 for 100 tablets. The same tablets in a plastic bag from Health Rack cost £5.99. 100 Brewers yeast tablets cost as little as £2.50. So, be careful where you buy these and any other vitamin or mineral supplement. Make sure you compare like with like though. You need to look at the weight and constituents of each tablet (packaging doesn't matter!)

Extra B vitamins can help reduce stress and give you extra energy. They may also give you a little extra protection from winter colds and 'flu'.