Magnesium Glycinate vs. Magnesium Aspartate
Among 6,062 on-market magnesium products with an identifiable primary form, 9.5% use Magnesium Glycinate (573 products) and 8.2% use Magnesium Aspartate (500).
| Magnesium Glycinate | Magnesium Aspartate | |
|---|---|---|
| Quality tier | Unrated | Unrated |
| Magnesium by weight | 14.1% | 8.4% |
| Share of market | 9.5% | 8.2% |
| On-market products | 573 | 500 |
| Median declared dose | 100 elemental mg middle half: 28.2–185 | 76 elemental mg middle half: 40–167.5 |
| Most common brands | Metagenics, Metabolic Maintenance, KAL | Bluebonnet, Douglas Laboratories, PS ProSupps |
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 Magnesium Glycinate is unrated
Marketed as a gentler, well-absorbed chelate; no glycinate-specific human bioavailability trial is cited (Walker 2003 tested a generic amino-acid chelate, not glycinate, and did not assess clinical symptoms), so no tier is assigned.
Source: none located for glycinate specifically; see Walker AF et al. 2003, Magnes Res 16(3):183-191, PMID 14596323 (generic amino-acid chelate)
Why Magnesium Aspartate is unrated
No head-to-head human bioavailability study specific to this salt was found.
Source: none located -- no human head-to-head study found (a rat stable-isotope study including aspartate exists: Coudray C et al. 2005, Magnes Res 18(4):215-23, PMID 16548135; not read in full)
Other magnesium comparisons
- Magnesium Oxide vs. Magnesium Citrate
- Magnesium Oxide vs. Magnesium Glycinate
- Magnesium Oxide vs. Magnesium Aspartate
- Magnesium Oxide vs. Magnesium Amino Acid Chelate
- Magnesium Citrate vs. Magnesium Glycinate
- Magnesium Citrate vs. Magnesium Aspartate
- Magnesium Citrate vs. Magnesium Amino Acid Chelate
- Magnesium Glycinate vs. Magnesium Amino Acid Chelate
- Magnesium Aspartate vs. Magnesium Amino Acid Chelate