Possible allergy to nespresso pods

Hi all,

I am a huge fan of Nespresso - I really like the taste and I also like the time saving aspect of just pressing a button and my coffee is ready.

However, around a year ago I started to get really dry and itchy scalp at the end of the basically every day. I switched shampoo and tried out a number of stuff, but I suspect it is caused by the Nespresso pods. In particular, when I stop using the pods and I just drink regular coffee, the itchiness and dry scalp essentially go away.

Has anybody ever encountered a similar experience? Could it be the effect of some special additive in the pods?

Thanks!