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Forms of zinc: bisglycinate, citrate, gluconate, picolinate

Bisglycinate, citrate, gluconate, picolinate… As with magnesium, zinc salts differ in their elemental zinc content and their solubility. This guide compares the forms in the catalogue on factual criteria, to help you reason through a product choice, with dosing to back it up.
Formes de zinc — couverture du guide praticien
  • Compare products on elemental zinc per dose: bisglycinate provides around 20 to 25%, citrate around 31%, and gluconate around 13%.
  • NRV: 10 mg. Doses in the catalogue most often range from 5 to 30 mg of elemental zinc per dose.
  • Zinc has numerous authorised EU claims (immunity, skin, hair, nails, cognitive function, oxidative stress…), applicable regardless of the form.
  • Some formulations combine copper and zinc; each has its own EU claims.

Reading the dose: elemental zinc first

As with all minerals, European labelling declares the elemental zinc content, to be compared against the NRV of 10 mg (Regulation (EU) No 1169/2011). The weight of the salt is not comparable from one form to another: it is the elemental content that matters.

Forms in the catalogue

Zinc bisglycinate

A chelate of zinc and glycine, around 20 to 25% elemental zinc. A widely used organic form, often chosen by manufacturers for single-dose products.

Zinc citrate

A salt of citric acid, around 31% elemental zinc, neutral in taste, suited to both chewable tablets and capsules.

Zinc gluconate

A salt of gluconic acid, around 13% elemental zinc. A long-established form in trace element therapy, widely used in tablets.

Zinc picolinate

A complex of zinc and picolinic acid, available in the catalogue in targeted formulations. The elemental content and dose are shown on the product page.

Zinc and copper

Several manufacturers combine zinc and copper in a single formulation; the two trace elements each have their own EU claims. The exact composition is shown on the product page.

How to choose

Three factual criteria: the target dose of elemental zinc, the form (a trade-off between content, solubility and galenical formulation), and the presence of combinations (copper, vitamin C). The catalogue’s Zinc hub lists products by form, with practitioner pricing.

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