I'm not familiar with this drink, but I guess there are 2 units / glass, in which case one or two drinks ( but not every day ) should be OK.
But this whole topic is a minefield ! Cancer Research UK reminds us that alcohol is a risk factor for cancer (breast, liver, large bowel, mouth and throat) , although factors other than alcohol pose a bigger risk. So while there is no completely safe level of drinking, moderation must surely be the answer !