Posted by Team Tune
on July 20, 2026
The word mineral on a label hides a lot of variation. Two products can both promise minerals and deliver very different things, because minerals come in several forms that your body absorbs at very different rates. Here is how to tell them apart.
The main categories
Ionic sea minerals
These come from seawater or ancient sea beds, concentrated and often with most of the sodium removed. Their defining feature is that they are ionic, meaning already dissolved and carrying an electrical charge. That matters because ionic minerals are in the form the body can take up readily, without having to break anything down first. A single sea mineral source also naturally carries a broad spectrum of trace minerals together, which is hard to replicate by adding them one at a time.
Chelated minerals
Chelation binds a mineral to an amino acid, like magnesium bisglycinate binding magnesium to glycine. This protects the mineral through digestion and tends to improve absorption compared with cheap salts. Chelates are precise: you can dose a specific mineral at a specific amount, which is useful for the ones you want to hit a target on, like magnesium.
Cheap mineral salts
Oxides, sulfates, and similar inorganic salts are inexpensive and look strong on a label because they carry a high percentage of elemental mineral by weight. The catch is absorption. Magnesium oxide is the classic example: high on paper, poorly absorbed in practice. When a label lists a big number but names a cheap salt, the absorbed dose is lower than it appears.
Which is better?
It is not a straight ranking, because they do different jobs. Ionic sea minerals shine for delivering a broad spectrum of trace minerals in an absorbable form. Chelates shine for hitting a precise, meaningful dose of a specific mineral like magnesium. Cheap salts mainly shine on cost. The strongest formulas tend to combine the first two: chelated forms for the headline minerals you want to dose accurately, and an ionic sea mineral source for the wide base of trace minerals.
That is the logic behind Tune Current. It uses individual chelated forms for its magnesium and key minerals, and draws its 75+ trace minerals from an ionic sea mineral source, so it gets both precision and breadth rather than choosing one. To go deeper on the magnesium forms specifically, see our guide to glycinate vs citrate vs malate.
How to read a label for this
Look for named forms. Bisglycinate, malate, and citrate are chelates or organic salts with reasonable absorption. Ionic or sea-derived signals a trace mineral source. Oxide and sulfate are the cheap salts. If the label just says a mineral and a number with no form at all, you cannot tell what you are getting, and that ambiguity usually favors the cheaper option.
FAQ
Are sea minerals better than synthetic ones?
For delivering a broad, absorbable spectrum of trace minerals, ionic sea minerals have an advantage. For dosing a single mineral precisely, a chelated form is often the better tool. Good formulas use both.
What does ionic mean on a mineral label?
It means the mineral is already dissolved and carrying a charge, the form the body can absorb readily without breaking it down first.
Is magnesium oxide bad?
Not harmful, but poorly absorbed. It looks strong by elemental weight while delivering less usable magnesium than chelated forms.
Current is a dietary supplement. These statements have not been evaluated by the FDA. Not intended to diagnose, treat, cure, or prevent any disease.
