The grapefruit used in this vinegar is the baby of an acidless pomelo and a seedy white tetraploid. The result is a low-acid, seedless fruit, and even though the rind is included in the fermentation it doesn't have the same bitter profile as its cousin the ruby red.
This is a bright cup of sunshine and will add brightness but it keeps the acid low. It's a great addition to any salad with delicate lettuces or herbs, and also a great way to start your morning – with a splash added to water.