@Still Raining Sure! I saw my doctor for my reaction and she was the one who told me sulfites can be a natural by product of the process. I'm allergic to sulfa and sulfur both and as both reactions I had were immediately after trying the powder, she suspects this was the case for me. Haven't had hives since stopping. I have friends with sulfa allergy and are fine taking Collagen. I researched further and found this information on https://myahs.eu/faqs/
@CAN YOU TELL ME ABOUT THE SULPHITE RESIDUES IN COLLAGEN PRODUCTION
Sulphites come from the process of enzymatically hydrolyzing (pre-digesting the Collagen outside the body by breaking down the amino acid chain by a process of adding synthesized enzymes) or fermenting products. They are a natural by product of the Collagen hydrolyzing process. The sulphur that holds the bonds between the molecules is broken up from these processes and changes them to sulphite – an ionic form of sulphur. During the manufacturing process Collagen is passed through a nano filter to remove excess residues. The Food and Drug Administration (FDA) in the U.S regulates that it is a legal requirement to list a sulphite warning on red wine. The regulation states that sulphites have to be declared on products that contain 10 parts per million or more. Red wine typically contains 125-250 parts per million, (about 40mg per 4oz glass). AHS Super Collagen + C contain a maximum of 1.3mg in 6 tablets.
Some consumers may find that they are allergic to sulphites. Consumers who are allergic to sulphites can not typically tolerate red wine, pickled vegetables, dried fruits or even aspirin. The most common symptoms of sulphite intolerance are becoming itchy and having headaches. In reality, individuals who are allergic to sulphites should avoid facial products that contain soluble Collagen as they could have a topical reaction. It is quite interesting to note that consumers with sulphite intolerance are often asthmatics.