In reply to John Mcshea:
You need to start from whatever the problem is. Sure, some folks may have benefitted from a diet designed against inflammation...but they may have Chron's disease. You've given no background for your issue being an inflammatory one. So, basics:
1. Hydrate. Water won't rust your knees. Every beautiful biochemical system in your body is optimised for good hydration. Help out. Get a 2l bottle and finish it.
2. Universally good advice is a diet that's varied, high in fibre, nutritious, and moderate. That generally means less processed stuff (lots of added salt, sugars, fats and, well, shit) and more cook-from-scratch. A big selection of fruit and veg each week and go light on pre-pack or processed stuff.
3. More complex the better for carbs. White bread and potatoes are actually more diabetogenic than sucrose (table sugar). You want to avoid glucose concentration peaks in your blood. Starch is a single enzymatic step from glucose and creates a spike; more complex carbs (which is everything) spread it.
4. If you're going for a "particular" diet, read the exclusions/requirements. A vegan diet is great...but if you don't get vitamin B12 you will get neurological damage and it is irreversible. So be thorough. And some of the more exotic diets getting promoted are harmful.
5. Sugars in particular are responsible for many people's mood and energy swings. Try five days (which is aimed to be just about in reach for most people) of simple food with only complex carbs; fixed sleep times (10.30-6.30 is good); 30' fresh air and walking each day. NB. Phone goes off at 10pm
If you have had advice of an underlying inflammatory issue, then ?80%+ would be Chron's or gluten intolerance. Both are easy to check with a trial diet.