How Many Syns in Port?

Port is a fortified wine from the Douro Valley in northern Portugal, where grape spirit is added partway through fermentation to halt the process and preserve the natural sugars. The result is a rich, sweet, ruby or tawny tipple that traditionally rounds off a meal alongside cheese, walnuts or a slice of Christmas cake.

On Slimming World, Port sits firmly in the syns column, and unfortunately it carries a heftier price tag than most table wines you might reach for on a Saturday night. A standard 50ml schooner clocks in at around 4 syns, while a more generous 75ml pour pushes you up to 6 syns, so it pays to measure rather than free-pour from the decanter.

Because Port is fortified with grape spirit, it sits at roughly 19-20% ABV, almost double the strength of a typical red wine, and the residual sugar that gives it that luscious mouthfeel is precisely what bumps the calorie count up to around 158 kcal per 100ml. You can absolutely fit a small glass into your daily syns allowance, particularly around Christmas, anniversaries or after a Sunday roast, but stacking multiple measures alongside cheese, chocolates or a port-soaked pudding can quickly eat into your weekly Flexible Syns.

White Port served long with tonic and ice has become a popular lower-volume serve, and splitting a 50ml measure into a tall glass can feel surprisingly generous without nudging the syns higher. If you cook with Port, in a reduction for steak or a sticky glaze for ham, count the syns of whatever goes into the pan and divide by the number of portions served.

Treat it as the indulgence it is and the numbers stay manageable.