Here's some clarity,
My family's been in the business(licquor) since 1970, I've been collecting wine for about 15 years, sulfites give you a headache only if you're allergic (it's a natural by product of the process of making wine) so ther'es no difference between a Cab, Merlot, or Pinot or the fifteen dollar bottle of wine. As far as different levels of distilling spirits (especially Vodkas) it's pure marketing,(my best friend's dad is the VP of the world's largest wine and licquor distributor , they're based here in Miami, we've talked at great length about triple filtering, one filtering level is enough to remove any impurity that might make you sick, anything beyond that is pure marketing) you can thank SKY vodka for that one. Your headache comes from excessive blood alcohol (it constricts the blood vessels in your brain) and your liver's inability to process it. If you over indulge on that fifteen dollar bottle of wine your headache will just be as nasty that if you over-indulge on that one hundred and fifty dollar Opus. If your sensitive or are outright allergic to sulfites then you must watch your intake no matter what type of grape the wine is made from. Sky, Finlandia, Absolut, Stoli, Belvedere,Grey Goose, Chopin will produce the same nasty hang over if abused, don't be fooled by the marketing hype, don't think you can over-indulge if a vodka claims to triple distilling. I hope this helps.
