In the nutraceutical ingredients market, the chemical form of a mineral is as important as the mineral itself. And one of the innovations that has most transformed the efficacy of mineral supplements in recent decades is chelation.
What does it mean for a mineral to be chelated, and why is it a real advantage over inorganic forms? Here we explain.
What is a chelated mineral?
A chelated mineral is one that has been bound to an organic molecule - usually an amino acid or peptide - by a controlled chemical process. This bonding forms a stable structure that protects the mineral during the digestive process and improves its intestinal absorption.
The term «chelated» comes from the Greek chele, meaning «claw»: the organic molecule surrounds and «holds» the mineral ion, facilitating its transport through the intestinal mucosa.
Mineral forms: inorganic vs. chelated
There are basically two main groups of minerals in supplementation:
- Inorganic forms (salts)carbonates, oxides, sulphates, chlorides. They are generally cheaper but less bioavailable, and in some cases may cause gastrointestinal discomfort.
- Chelated organic formsbisglycinates, citrates, gluconates, picolinates, malates. Higher bioavailability, better digestive tolerance and, in many cases, stronger clinical support.
Comparative examples:
- Magnesium bisglycinate vs magnesium oxidebisglycinate shows significantly higher absorption and less laxative effect.
- Zinc bisglycinate vs zinc sulphatehigher retention and tolerance with the chelated form.
- Iron bisglycinate vs ferrous sulphateless nausea and constipation, better compliance with treatment.
Why are they better absorbed?
Chelated minerals are absorbed by the digestive system via amino acid transport routes, which are more efficient than free metal ion absorption routes. In addition, chelation protects the mineral from negative interactions with other dietary components (phytates, oxalates, fibre) that can inhibit its absorption.
Most common formulation applications
- Magnesiumbisglycinate and malate are the preferred forms in relaxation, sleep and sports performance formulas.
- Zincbisglycinate and picolinate in immune and reproductive supplements.
- Ironbisglycinate in supplements for women of childbearing age and athletes.
- Copper, manganese, chromium, selenium: chelated or glycinated forms in premium multimineral complexes.
What the purchaser of ingredients should check
When purchasing chelated minerals, it is advisable to confirm:
- Chelation ratio (percentage of mineral per total weight of chelate).
- Evidence of the stability of the chelated bond (not every «organic form» is technically chelated).
- Certifications of purity and absence of heavy metals.
- Origin of the amino acid used in chelation (relevant for vegan formulas).
In a nutshell
Chelated minerals represent the natural evolution of mineral supplementation: higher absorption, better tolerance and more predictable results. For formulators looking to differentiate themselves with proven quality products, the choice of mineral chemical form is a decision that should not be underestimated.
At Sanmart we have a wide range of ingredients in this category, with GMP and ISO certifications and full traceability. Consult our catalogue or contact our technical team for more information.
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