Nutrient forms and bioavailability: why the form matters
N. Thornton, MSc. · Molecular Biologist · 7 min · RARE Labs
Same milligram figure, different absorption. How we select nutrient forms for RARE formulations.
Bioavailability describes how much of a nutrient actually reaches the blood and target tissues.
Salt form, chelation, particle size and co-ingredients all influence that share — sometimes considerably.
For RARE that means: we choose forms with solid human data and document amount and form transparently on the label.
Study design at a glance
- Type
- Narrative review
- Participants
- n/a
- Duration
- n/a
What this means — and what it does not
- A higher milligram figure is not automatically the stronger formulation.
- Transparent declaration is what makes products comparable at all.
Limitations
- Bioavailability data are often collected in healthy cohorts.
- Individual factors such as gut health change absorption.
Sources
- Pardo MR et al., Nutrition 2021 — Bioavailability of magnesium food supplements: A systematic reviewPardo MR, Garicano Vilar E, San Mauro Martín I et al. · Nutrition · 2021 · PMID: 34111673
Editorial note: these articles are contextual knowledge pieces and do not replace medical advice.
Our products are foods (food supplements), not medicinal products. They are not intended to prevent, treat or cure any disease. If you have symptoms, pre-existing conditions, are pregnant or breastfeeding, or take medication, please consult your doctor or pharmacist.