Here is a previous thread with some good info:
http://www.trifuel.com/forum/16767/must-haveuse-supplements

I hate pills....I take 1 multi vitamin and I don't take anything else. No asprin, Tylenol, Ibuprofen, ect... I hate taking the vitamin too, but I can actually tell a difference over a week or so.

If I knew a bit more about nutrition and vitamins, I'd forgo every pill for as long as possible.

I also only take a vitamin. I find that when my energy level starts to fall, its because I am not eating 4,000 calories a day, but have fallen to more like 2,800-3,000 without realizing it.

To help with help with recovery I recently added glutamine powder to my diet. So far it feels like the only supplement I take where the effects are quite obvious and can actually be felt.

Energy supplements, IMO, don't suit endurance athletes very well. In fact, few supplements do. I've always been a protein guy (whey and such) and find that it's the healthiest way for me to supplement real food so I can get enough protein in my diet to rebuild the worn muscles. After training, I always mix 30 grams of a protein hybrid with Accelerade and some complex carbohydrates. It durns out to be about 50 grams of protein along with 60 grams of sugar and 50 of complex carbs - somewhere around 520 calories. I like it, but there may be those who do not. Other than that, fish oils and healthy fats are imperative (so eating fish or taking pills, whichever) as well as a vitamin. That's my opinion, and it works very well for me.

I have known some athletes who use prohormones and other supplements that you probably consider more extreme. They claim it makes a world of difference, but frankly I'm not willing to risk my overall health to recover slightly faster or run/bike/swim faster/longer. Plus, it's not "legal" for races so why risk it at all.

I take Tonalin CLA, Creatin, Flax Seed Oil, Multivitamin, Vitamin D, and Protein shakes every day. Once the races start I'll probably stop them all together and get to a more "conditioning" type phase, but right now I'm trying to build a little muscle and lose a little fat.

Fish Oil is the wonder supplement in my books. Do your research for a good brand.

Also, B Vitamins are good when you are feeling worn out. B12 especially.

Other suggestions:

Try to get more sleep (if possible).

Watch caffeine intake if you consume it.

I have been feeling sluggish lately and contribute it to not eating enough and not training as much (due to ITB battle and treatment). Also contribute not strength training as much to the gym I belong to - its down stairs in a basement, lately it feels like a chore to lift, when it usually was the highlite of my day. I should focus more on refueling right after a workout too. So, NO EXCUSES. I just picked me up a multivitamin from Vitamin Shoppe, Kold Kare to kick this cold and will hit the food store to fill my fridge. Gotta get back in the saddle.

My problem with supplements/pills is - I don't like taking multiple pills every day. I can never stay in the routine of continuosly taking them. After 2 weeks I forget 1 day, another day, go away and don't bring them, then just dont begin taking them again. I have to be consistant. I will now take my new multivitamin, and the usuall Glutamine & Glucosamine & whey protein shake (sometimes with water/milk or add peanut butter and/or bananna) & continue to eat good.

BTW, there are sooooo many pills out there. I spent 15min looking at the wall of bottles/jars. !

What is the big difference between a multivitamin for men & Women or just a plain old MV?
When I had the MV bottle at checkout, the girl behind the register said "this has iron in it. You need a multi with iron? Usually women need the iron. Maybe get the "mens" multi..."
I'm like WTF...with iron, no iron, added this, no that, 300mg of this vs 250mg of the same thing in 2 different brands of multis. There are tooo many options out there.

I picked up the basic Vitamin Shoppe Daily VM Caps Multivitamin. 1 pill daily. Good? It sholdn't be brain surgery but feels like it with all these options....

I take a multi vitamin(w/o iron) Fish oil(It helps with my cholesterol) and B vitamin.
Other than that I just try and get my nutrients thru normal food.
Daily, I usually eat up to 8 servings of fruits and veggies(mostly raw) , oatmeal with flaxseed, wheat germ and honey, 3 servings of low fat or non fat dairy, 2-3 portions of lean protein, and about 100-120 oz of water.