"Hi, I eat alot of broccoli and extra magnesium tablets, and I feel a big difference in my hyperacusis. Someone else with the same experience?"
Yes! My huperacusis is from head injury... It has been 24-7 and severe for over 2 years, and occurs in absence of migraine (also have mild tinitus from time to time, but that's mostly with fatigue or migraine).
But I found that I need to take a supplement of ... ideally 400 mg a day, but i have trouble tolerating that (GI symptoms, helped by increase fiber) and so 266 mg some days (worked with magnesium alone, but switched to calcium, magnesium, zinc per GI doc rx for side effects).
It's not a placebo effect - e.g. did not get same results with: imipramine, topamax (helped much more with light sensitivity, but i couldn't tolerate it), botox, lisinoprel (which helped with migraine, but i couldn't tolerate it), beta blockers, or migraine rescue meds.
If you take supplements, talk with your doc first. Magnesium interacts with certain meds, decreases the effectiveness of certain meds, and you can accumulate too much and have problems.
FYI - i found that less than these minimum doses didn't really work (still really impaired). When I withdraw it (like fasting for colonoscopy and had to skip for 3 days) my symptoms worsen. Not placebo because I didn't realize why it was worse at first, until i remembered i had stopped the magnesium.
Nothing works for everybody. And see a doc to monitor levels/side effects/interactions.