Perhaps I am just getting old (okay, I am old ;)), but I really don't see the point in this. First of all, Tannins are not what cause "wine" headaches. I drink mostly reds and have never gotten a headache. But, more fundamentally, if there are Tannins in the wine, it is because the winemaker wanted them there. Winemakers hold the wine until they are ready to release it, some wines are more tannic than others by design.