Andrew Huberman· PhD
Increased macular pigment optical density," that just means that macula, is an area of the eye for central vision, for high acuity vision. Pigment density there is good, you want pigment there. "Increase macular pigment optical density "and visual acuity," Visual acuity is your ability to see things in fine detail. "Following consumption of a buttermilk drink "containing lutein-enriched egg yolks."
Verbal pushback — no audited source on record.
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