Sulphites, fermentation, side effects

https://www.google.fr/amp/s/amp.theguardian.com/lifeandstyle/2009/feb/14/wine-sulphites

One example: cider

A lot of ciders provoke headaches which are of multiple origins. However, sulphites are one of the major cause as it acts as a vasodilator.
Added sulphites make a great difference in the final content of sulphites even if a small amount is the result of the fermentation process.