Boron
2 brands compared · cheapest first
Life ExtensionBest value
Boron 3 mg
3 mg elemental boron · 100 capsules
$5.25for 100 doses
$0.053per dose
$0.0175 / mg
Best value by 4-5x per mg. With B2. Standard 3mg/day maintenance dose. 180-cap option (B08318P1Q4, $21.69 pack of 2).
Pure Encapsulations
Boron (Glycinate)
2 mg elemental boron · 60 capsules
$14.00for 60 doses
$0.233per dose
$0.117 / mg
Glycinate form (chelated). For testosterone protocols, the 10mg/day loading dose for 7 days = 5 caps.
Note
Thorne doesn't carry standalone boron. The above two cover most uses.