When choosing a multivitamin, it is ideal to find one without vitamin A or E, as some evidence suggests these supplements may increase death rates and offer no cognitive benefit.

The speaker created a supplement called Micro Viamin, which specifically excludes vitamins A and E but includes methylated B vitamins, magnesium, TMG, and hyaluronic acid.

Correcting only B vitamin deficiencies may not improve cognition; benefits are seen when correcting multiple micronutrient deficiencies simultaneously with a complete multivitamin.

A 2020 systematic review found strong evidence that high levels of blood homocysteine are significantly associated with cognitive decline, shifting focus to B vitamins which can lower it.

Contrary to early theories, large-scale trials have consistently shown that antioxidant supplements like vitamins A, C, and E are not protective against cognitive decline.

The 2022 COSMOS Mind study found that daily multivitamin use appeared to slow brain aging by as much as 1.8 years, or 60%, over a three-year period.

A separate study, COSMOS Clinic, confirmed that daily multivitamin supplements led to a significantly favorable change in memory performance, reinforcing the initial findings.

Despite improving cognition, large studies show no evidence that multivitamins prevent cancer or cardiovascular disease.