Hi unknownsubject, & welcome!
I don't wish to complicate matters for you... A high quality multi is better than trusting diet to fill all your needs, but I have a couple thoughts for you to ponder.
Some vitamins are best taken with meals, while others are better on an empty stomach. Vitamin C for instance will greatly increase absorption of dietary iron if taken with meals. This may be good for menstruating females, but males tend to accumulate excess iron as they age and over the long haul, taking a multi that includes C with meals may contribute to iron overload in males as they age. As most mulit's contain vitamin C and recommend taking them with meals, this can present a problem for males who don't wish to accumulate iron.
Vitamins like B-Complex and C are depleted quickly and are better taken in low doses twice a day rather than in large doses once a day, while oil soluble supplements need only be taken once per day.
If your multi contains minerals this can complicate matters as acid neutralizing minerals like calcium and magnesium can interfere with absorption of vitamins and minerals that require acidic conditions for proper absorption. Supplements that advertise "complete" mineral formulas also must include some minerals you may not need or want like iron and extra calcium.
Some vitamins are more suited to oil suspension than to dry formulation. Vitamin-E for instance. A multi tab will have E in dry form, whereas many feel a natural E with mixed tocopherols in oil suspension may be better absorbed and utilized. If you're going to take fish oil, substantial amounts of quality vitamin E will be required to keep this (fish oil) from oxidizing. It is also unwise to take fish oil if you drink (alcohol) as this will turn fish oil rancid in your liver and cause more problems than benefits.
Expensive isn't always better... I take a cheap low dose vitamin C and B-Complex twice a day on an empty stomach, and a quality oil based vitamin E with mixed tocopherols once a day with meals. I prefer to get vitamin D from moderate sunbathing during the summer and low dose supplementation during the winter. For minerals, low dose mag-citrate (200mg) and low dose yeast based selenium and zinc are what I feel are important to supplement. I let the trace minerals take care of themselves through diet. Deficiencies in trace minerals (other than selenium and zinc) are rare, and too much copper and perhaps a few others may do more harm than good.
Rather than spend a lot on an expensive multi, I like to put my big bucks into a quality curcumin supplement. PPC (polyenylphosphatidylcholine) is another supplement I don't mind spending a few extra dollars on. Livers love lecithin (phosphatidylcholine) and a happy liver is the foundation of good health.
Nutritional supplements can be very helpful to a lot of people but it's always best to do your homework and learn as much as you can about them before you dive in and lay your money down. I hope you get a few more helpful opinions in your post.
Best of Luck to you!
P.S. You might want to look into Quercetin for your pollen allergy.
Edited by synesthesia, 05 May 2013 - 05:10 AM.