But a new Kyowa-funded study of 60 healthy women found a monthlong regime of daily doses of citicoline resulted in improved attention and fewer errors on a cognitive test compared with placebo, says co-author Deborah Yurgelun-Todd, a scientist at the Brain Institute at University of Utah in Salt Lake City, who is a paid consultant to Kyowa.

WSJ: An Energy Shot for the Brain

CNN's Susan Candiotti, Deborah Feyerick, Carol Cratty, Jake Tapper, Brian Todd, Pamela Brown and Kathleen Johnston contributed to this report.

CNN: 3 more detained in Boston attack

CNN's Susan Candiotti, Deborah Feyerick, Gloria Borger, Carol Cratty, Jake Tapper, Brian Todd, Pamela Brown and Kathleen Johnston contributed to this report.

CNN: Bomb suspect's buddies covered for him, feds say

CNN's Matt Smith, Tom Watkins, Susan Candiotti, Deborah Feyerick, Gloria Borger, Carol Cratty, Jake Tapper, Brian Todd, Pamela Brown and Kathleen Johnston contributed to this report.

CNN: SHARE THIS