That's my opinion as well. I've been looking at my trends/spikes and it seems to be correlated to blood glucose levels. I have been diagnosed with diabetes, and take metaformin 2x a day to keep my levels down. I've gotten away with it and go thru the roller coaster where I really watch what I eat for a while and then, well I just get tired of caring. So I guess I'll be the guy that tells you how stupid he is, and hope someone else will benefit from it.
What I can tell you is that I've been eating quite a lot of junk food that I shouldn't be. It never seemed to be a problem, although obviously it was in the background. I'm 53, right at about that point in life where things start going wrong. I've only had tinnitus for about 10 weeks and it's been all over the place. My pattern has been, more or less, have a bad T day, don't eat much, stressed out, work my arse off and don't go to sleep until I can barely crawl into bed so I can actually fall asleep. After a couple of intrusively loud days, I'll have a couple days off from it. Near silence. Hey what a great day right? I've been suffering, at times hanging on by a thread, so let's have some ice cream and some other stuff. A couple days later it comes back. I went thru that a few times before I noticed the pattern. I cut out all processed sugar for a week, well 6 days anyway. No snacks that I didn't have to peel (oranges, but mostly apples and a banana here and there). But positively nothing with processed sugar, and most of what I ate was pretty low in sugar and carbs. I did that for six days and had 4 full days of near silence, I had to plug my ears and really listen for it. I'd hear it in the morning just a bit (google rebound rebound hyperglycemia and Somogyi effect) but before I was up for an hour it was almost gone. It was, pardon my language, fucking glorious. So I granted myself a free day on Sunday. Wrong answer. Monday was good, but I recall I "heard it coming" , then woke up Tuesday morning very early, and my old friend was back. Only it didn't go away like it had been for the last few days. It's nearly 9pm now and its still at a solid 4/10 level for me.
So that's been my experience. I'm surprised there isn't much talk here about blood glucose, diabetes, etc. There seems to be a lot online about it. There are a lot of pre-diabetics out there that don't know they are.
My advice to anyone is to cut as much sugar as you possibly can out of your diet. REally look at what you eat and check the labels. Plan your meals and for God's sake exercise a little. I've allowed myself to deteriorate since I retired from the military and I know better. I can tell you after a week (less my free day sunday) I already lost 10lbs and I have mad energy. I did 60 minutes on the treadmill this morning and burned just short of 600 calories and I felt better than I have in a long time. Don't count on pills or anything else to put down your T. The best bet, in my opinion, is to get as healthy as you can be. At the very least you'll feel a lot better.