Hmm, that’s interesting but IIRC Tyrosine itself isn’t all that sour when tasted, nor are really any other amino acids I can think of aside from possibly Taurine, I assumed it was a small amount of hydrolysis of the acetyl group was occurring to enable the taste difference, but if you’ve got some more context I’d love to hear it
Outta curiosity what is a Keto cough drop?
I mean I don’t think there are any high protein cough drops, but I’m pretty sure you can get sugar free cough drops… You can atleast definitely get sugar free boiled sweets, a couple of type 1 diabetics I know have them, and you get them at the checkouts here as shops aren’t allowed to put sugary snacks at the checkouts.
And in regards to getting proteins that are atleast in stock, lentils and peas/beans are pretty good sources of proteins, I’ve seen people make some good looking keto friendly naan breads/flat breads using pea protein (IIRC), have you tried anything like that?