Douglas Laboratories
PQQ Plus

30 vegetarian capsules

Price: $85.20
Cost per day: $2.84

Douglas Laboratories
Juvenon Pro Cognitive

90 vegetarian capsules

Price: $66.40
Cost per day: $2.21

Klean Athlete
Klean Focus®

90 vegetarian capsules

Price: $52.60
Cost per day: $1.75