Supplement Label Index

Boron Citrate vs. Boron Glycinate

Among 2,843 on-market boron products with an identifiable primary form, 30.6% use Boron Citrate (869 products) and 21.1% use Boron Glycinate (601).

Boron CitrateBoron Glycinate
Quality tierUnratedUnrated
Boron by weight——
Share of market30.6%21.1%
On-market products869601
Median declared dose1 elemental mg
middle half: 0.5–3
1.5 elemental mg
middle half: 1–3
Most common brandsDouglas Laboratories, vitafusion, Pure Essence Ionic-FizzPure Encapsulations, Life Extension, ProCaps Laboratories

Doses are declared per serving in elemental mg. “By weight” is the share of the ingredient that is the nutrient itself (e.g. elemental magnesium in a magnesium salt).

Why Boron Citrate is unrated

No head-to-head human bioavailability or efficacy comparison of this form was located in PubMed searches.

Why Boron Glycinate is unrated

No head-to-head human bioavailability or efficacy comparison of this form was located in PubMed searches.

Tiers summarize published comparative bioavailability or outcome evidence for each form (see methodology). This page describes the market; it is not a recommendation to take either form. Talk to a clinician about what's right for you.

Other boron comparisons