Sulfites slow bacterial growth and prevent oxidation. They are found in seafood, meats, vegetables and wine. Side effects could include an allergic reaction, asthma attack, trouble breathing, and hives. Allergists don’t know what causes or how much causes a reaction.
There are different kinds of sulfates in food, some more harmful than others. I was curious about sulfates because I saw sodium bisulfite listed on a package of seaweed and wondered what it was. When I googled it, pool chemicals and the like came up. I think I will just abstain entirely, thank you very much.