Why Ten-Ingredient Brain Formulas Almost Always Underdose

By the Memo Volt Research Desk · Published 2026-08-22 · 7 min read

Walk down any supplement aisle and count the numbers on the front of the boxes. Ten-in-one. Fifteen powerful ingredients. A twenty-two ingredient proprietary blend. More sounds better, and that instinct is what the packaging is built on.

It is also where most of these products fall apart, and you can work it out yourself with a calculator and thirty seconds.

Start with the container

A capsule is a physical object with a fixed volume. A size 0 capsule — the common one — holds roughly 400 to 500mg of powder. A larger size 00, the biggest most people will swallow comfortably, holds around 700 to 800mg.

That total has to cover every active ingredient plus the excipients: the flow agents, anti-caking agents and bulking material that let a filling machine work at all. So the real space for actives is less than the headline figure.

Now look up the research doses

Take the ingredients in a typical formula and find the dose used in the trials people cite for them.

• berberine: 900–1500mg a day, split into two or three doses
• Morosil: exactly 400mg a day in its published trials
• Ceylon cinnamon: 1–6 grams a day in blood sugar studies
• oleuropein: 500–1000mg a day of olive leaf extract
• saffron extract: 28–30mg a day of standardised extract
• corosolic acid: 10–48mg a day

Add the first four together and you are already past three grams. That is four to six capsules of pure ingredient, with nothing left over for the other six items on the label.

What actually happens instead

The formula is built to the capsule, not to the research. Ingredients with small research doses — saffron at 30mg, corosolic acid at 20mg — can be included at meaningful amounts. Ingredients with large research doses go in at a fraction of what the studies used.

There is nothing illegal or unusual about this. It is how the category works. The problem is that the marketing still cites the research, and the research was done at doses the product does not contain.

This is also why per-ingredient milligram amounts matter so much on a label. With those numbers you can check each ingredient against its own evidence in about a minute. Without them you cannot check anything, and you are buying a list of names.

The three questions worth asking

Before you buy any multi-ingredient supplement, ask these:

1. Does the label publish milligram amounts per ingredient? If it says proprietary blend and gives one total, you cannot evaluate it. That is the whole answer.
2. What is the research dose of the headline ingredient? Search the ingredient name plus dose. If the number is in grams and the product is one capsule, you have your answer.
3. How many ingredients are actually actives? Sweeteners, carriers and flow agents like xylitol get counted in ingredient totals. Subtract them before you judge the number.

Where this leaves you

Not necessarily walking away. A low-dose multi-ingredient supplement can still be a reasonable thing to try if it is affordable, safe with your medicines, and comes with a refund window that lets you find out on yourself.

What it should do is set your expectations. Expect a small nudge at most. Do not expect the results from a study that used ten times what your capsule contains. And spend the bigger effort where the evidence is strongest — sleep, activity, blood pressure, hearing and treating depression all beat any capsule on the market.

If you want to see this applied to a specific product, our evidence review of Memo Volt works through the same arithmetic ingredient by ingredient.