Does amino acid cause headache ?

Not that I know: Which Amino Acid is of concern, and do you supplement amino acids? Many foods and food additives can promote headaches in susceptible individuals, and lists can be easily accessed on-line. Food sensitivities are present only in about 15% of migraineurs.

I guess!: Amino acids are the basic units of every proteins and it is possible to be allergic or sensitive to certain proteins. So, technically Amino Acids can cause headaches but practically its the protein that can cause sensitivity or allergy. Hope this helps!