I also have a history of cancer sores in my mouth since I can remember...I have to be careful of any citrus in natural or pill(vitamin) form.

7-16-08 age 37@Dx, T3N0M0 SCC 4.778cm tumor, left side of oral tongue, non smoker, casual drinker, I am the 4th in my family to have H&N cancer
8-13-08 left neck dissection and 40% of tongue removed, submandibular salivary gland & 14 nodes clean, no chemo, IMRTx35
11-4-08 Recovering & feeling better