While we can most certainly survive without sugar, it would be quite difficult to eliminate carbohydrates entirely from your diet. Carbohydrates are the body's main source of energy. In their absence, your body will use protein and fat for energy.

The Government's healthy eating advice, illustrated by the Eatwell Guide, recommends that just over a third of your diet should be made up of starchy foods, such as potatoes, bread, rice and pasta, and another third should be fruit and vegetables.

"When people cut out carbs and lose weight, it's not just carbs they're cutting out, they're cutting out the high-calorie ingredients mixed in or eaten with it, such as butter, cheese, cream, sugar and oil," says Sian. "Eating too many calories – whether they are carbs, protein or fat – will contribute to weight gain."

Unless you have a diagnosed health condition such as wheat allergy, wheat sensitivity or coeliac disease, there is little evidence that cutting out wheat and other grains from your diet would benefit your health.

http://www.nhs.uk/Livewell/loseweight/Pages/the-truth-about-carbs.aspx

I've rarely been prompted by articles on the internet, to react or respond, but the advice given in the linked article above is both grossly inaccurate and arguably positively dangerous.
There is abundant evidence available to prove that not only do we eat far too many carbs, but that in fact they are superfluous to the point of redundancy.
What matters most is good intake of proteins and fats. Trans fats being at the low end of the amount consumed.
They do NOT give you 'bad' cholesterol - there is no such thing. Human beings makes between
2000 - 3000mg/day on their own.
You really, as a source of health information, truly need to get your facts right. I and countless others are testament to a correct and healthy regimen of high protein, fats and low - or no - carbohydrates.
The whole article is currently the running joke on a health and fitness forum dedicated to LCHP/F adherents.
I have lost 2 stone. My Husband, who WAS a diabetes type 2 sufferer, has lost three, and no longer HAS diabetes. We have both undergone blood tests and health checks, and we are both advised our health - across the board - is excellent and commendable.
Please.
Check your facts.
The above article is total and utter rubbish and needs serious review. If not total deletion.