JANUARY'S the month when all the boozing, the late nights and the over-eating finally catches up with us.
We drag ourselves around, perhaps pledging "never" to drink again, or to abstain for a while and tackle our sagging health.
Specialist in nutrition, Professor Patrick Holford, says: "It's common for people to panic at this time of year because they may be feeling really groggy and struggling to perform.
"The reality is most of us are always vertically ill - that is, we are upright but don't feel great most of the time. The majority of people are usually functioning well below their potential because their body is overloaded with toxins from the food and drink they take in.