This is just my opinion, but...
There are many people whose seizures are very well controlled with anti-seizure medications. And they have minimal side effects. They just don't hang out in here. It's the people having problems that come here, to get help and support.
But even the people in here have theirs under control. Look at this poll:
http://www.coping-with-epilepsy.com/forums/f27/whats-longest-you-have-been-siezure-free-7952/
Most people in here have been seizure free for over a year.
Diet and supplements are always worth a try. It can't hurt unless you take too many and it's toxic, or if they hurt your stomach (some are acidic). But you don't hear from the people that it does't work for - only the people it does. They are a vast minority. For most people they need AED's. The only diet that has been shown through scientific studies by recognized scientists to work for most is the ketogenic diet, which is very difficult if not impossible for an adult to follow.
I say try diet, supplements, etc. It sure can't hurt. And some supplements are really needed, like vitamins B & D, and calcium. As for diet, you may be one of the lucky ones for whom it really works.
If you don't feel like trying all the diets, there are actually tests to see if you have blood sugar problems (5 hour glucose tolerance test), problems with wheat gluten (but it takes a biopsy of your colon), etc. The tests are a pretty good indicator whether your body has that problem and whether that diet will help you.
Me? I noticed no difference on B, D, 5-HTP, Magnesium, Calcium. I did notice a difference from Taurine. But everyone is different, and their body may be low on different things and may benefit from different things.
So give it a try. But don't just go off AED's willy nilly.
Here's what I take. I added the ones that are for brain health one at a time and watched to see if I felt different. Again, Taurine is the first that I felt a difference. Not a decrease in seizures, but I felt better. But that's me, not necessarily anybody else.
• Multiple Vitamin
• B Complex
• B-12 (1000 mcg)
• Vitamin D (about 3500 iu)
• Calcium (1200mg)
• Magnesium Glycinate (400mg)
• Taurine (5000 mg)
• 5-HTP (100mg)
• Probiotics (to help with the diarrhea from all those supplements)
P.S. Thought I felt a difference on 5-HTP at first, but that disappeared. Darn.