I think the thing to remember here, is that the important thing is to make sure you are able to sustain the diet.
No mad bad diet police man is going to come pounding on your front door, because you decide to add something to your coffee to make it more bearable.
You have already shown you have the comittment and belief in yourself and your will power to even take the first step onto this diet.
The choice is always going to be ultimately yours.
People can advise, can reply with what they may or may not do in your circumstance, but the final choice is your own.
If you can truely not bear to say goodbye to yor cuppa, then you have to ask yourself, whether this one adaptation will help you stay on the straight and narrow and within the guidlines for the rest of the diet.
You made the decison to undertake this diet as you are strong willed enough to know it might be a long journey but you want the end outcome.
None of us became overweight over night, so it stands to reasons none of us will lose it as quickly either.
Staying on this diet long term, can be hard, and to be honest if a little coffeemate means that you will find it easier to stick with it, I know my own answer to that, and it would be sat next to my kettle. (luckily i like my coffee black)
Remeber you will lose weight even if not in ketosis, ketosis is just a side affect, a by product of undertaking a vlcd. a pleasurable one granted, and not something I would ever want to be without! hehe
But we are all individuals and we all know our limitations.
I would much prefer to see you still typing here at your goal weight, than have you vanish off of the forums because you thought you were being 'naughty' with coffee... It is your diet, and you have to make it work for you, as long as you realise the scales may reflect any choices you make.
I am not adovcating anything.. before I am hounded hehe, I am just saying, it is more important to lose the weight, but without causing yourself to suffer unduely and give up.
xx good luck in what ever you choose and yes please do post the reply fromt he exante team.
Just remeber... there is no such thign as the diet police, we answer to ourselves.
xxxx