Are supplements useful if you already eat a balanced diet?

Where a balanced diet is enough

A listener asked Attia this question word for word on his AMA. For vitamins A, C and E on a diet of whole foods his answer was "almost assuredly not." He went further. If you also sleep well, train and get your vitamin D from the sun, the difference between the best supplement plan and none may be so small that it is the wrong thing to argue about.

Huberman agrees on the food. The vitamins and minerals that matter come from unprocessed food, the kind that spoils, and that is where he tells people to get them.

Where it usually is not

Hyman does not buy the comfortable version. About 80 percent of people test low or insufficient in vitamin D, and more than half run low in magnesium. Iron, zinc and selenium trail behind. So he gives everyone the same three basics, a gram or two of EPA and DHA, 2,000 to 4,000 IU of vitamin D3, and a multivitamin with forms the body absorbs.

Patrick takes a multivitamin to cover her bases, and she has trial data for it. In the three COSMOS trials, adults 65 and older who took a daily Centrum Silver showed about 2.1 years less brain aging after a year. She is well under 65 and takes it anyway. Her worst case, in her words, is "a little bit of expensive urine."

Where diet and supplements differ, nutrient by nutrient

The panel's exceptions come down to three things: the dose food can reach, the form the nutrient arrives in, and how much of it you absorb.

Creatine is a dose problem. Huberman says red meat has it, and the amount of meat you would need for a performance effect "is just far too high." His threshold for the brain is at least five grams a day of creatine monohydrate, and the effect shows up most in people who eat no meat. He eats meat and takes five grams anyway.

Vitamin D is a source problem. Attia lives in Texas, is in the sun every day, and says that without a supplement he is "lucky to be above 40." He takes 5,000 IU daily to sit at 50 to 60, and he expects most people to need a supplement to get above 50. Hyman adds the form: D3, never D2, which is what fortified foods use.

Omega-3 is both dose and form. Attia takes four capsules of high-EPA fish oil for about 2 grams of EPA a day, and he treats to an omega-3 index of about 12 on a blood test. Patrick warns that cheap fish oil comes as an ethyl ester, which absorbs less and needs food, while the triglyceride form absorbs better.

Hyman's food answer is small fatty fish, salmon, mackerel, anchovies, sardines and herring.

B12 and folate are form problems. Patrick puts about 40 percent of people at a 40 percent reduction in the enzyme that activates folate, so dietary folate and folic acid do little for them and homocysteine runs high. Attia takes methylfolate and methyl B12 and measures homocysteine, keeping it below nine. Hyman adds that B12 absorption drops with age.

Magnesium is a form problem. Hyman asked for citrate over magnesium oxide after back surgery because the body absorbs little of the oxide form. Attia rotates three forms to reach about a gram of elemental magnesium a day. Patrick says threonate carries too little elemental magnesium to count toward that.

Sulforaphane is the one case where food wins. Patrick says broccoli sprouts carry about a hundred times more of the precursor than mature broccoli, and 45 to 100 grams of sprouts a day reaches the doses in the studies she cites. Heat kills the enzyme, and mustard seed powder puts it back.

How the panel decides

Johnson takes the idea to its limit. His pill count sits between 104 and 111 and moves only when his blood work does. He also pulled apart a popular greens powder on camera and found 49 ingredients with no disclosed dose. The label tells you nothing.

Attia's test is the one to keep. A "superfood" feels life-changing when it fixes a deficiency you had. Past the level your body can use, more of a vitamin does little.

So eat mostly food that spoils, and get a blood test before you buy a supplement. Vitamin D, the omega-3 index and homocysteine are the three numbers the panel names, and check them first if you are over 50 or eat no animal products. Fill the gaps the test shows, at the doses above.

We checked every quote on this page against the transcript on 12 September 2026. Talk to a qualified clinician before you change a supplement, medication, treatment or testing plan.