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Strontium citrate

Strontium citrate suppliers and sourcing guide

Strontium citrate is the strontium salt of citric acid, made by reacting citric acid with strontium carbonate or hydroxide in water and drying the precipitate to a white powder. Suppliers state its elemental strontium content on the specification. Brands use it in capsules and tablets, usually as the single strontium source in a product.

See suppliersWhat to ask for on the COA
Also known as
Tristrontium dicitrate · Strontium citrate hydrate
Facts checked
November 2026

Forms and grades of strontium citrate

Suppliers sell different products under the same name. Specify the one you need.

  • Standard powder

    The common grade, with strontium content stated on the specification.

  • Granulated

    Granules for direct compression on tablet presses.

  • Blends

    Strontium citrate pre-blended with a carrier or flow aid for encapsulation.

What to check on the COA

Compare each result with your own specification when the lot arrives.

Strontium assay
Strontium by ICP-OES or titration.
Citrate content and identity
Citrate by HPLC or titration, plus IR identity.
Calcium and barium
Limits on calcium and barium, which occur with strontium in mineral raw materials, by ICP-OES.
Loss on drying
Moisture and water of hydration.
Lead and other metals
Lead, arsenic, cadmium and mercury by ICP-MS.

Storage, lots and expiry

Storage and shelf life

Store strontium citrate in tightly closed containers in a cool, dry place. It is stable under normal conditions. Shelf life is set by the supplier's specification, with assay and moisture the usual retest checks.

Lots and expiry dates

Record the strontium assay and barium result for each lot and calculate label amounts as elemental strontium. Keep strontium citrate separate from calcium salts to avoid mix-ups.

Regulatory status

Facts from regulators and standards bodies, each linked to its source.

  • A 2015 Health Canada summary safety review states that in Canada strontium is classified as a natural health product ingredient, found in licensed products as strontium citrate, lactate or gluconate.

    Source: canada.ca (opens in a new tab)

  • The same review recommended label updates for products providing adults more than 4 mg of elemental strontium per day, telling consumers not to use them if they have, or are at high risk for, heart disease, circulatory problems or blood clots.

    Source: canada.ca (opens in a new tab)

This is general information, not regulatory advice. Status differs by country and by how the ingredient is used, so check the rules for your product and market.

Strontium citrate suppliers

Manufacturers and distributors whose own websites say they sell it.

We are checking strontium citrate suppliers now

Every listing is checked against the supplier’s own website before it goes live, so this list fills in over the coming weeks. The specs and COA checklist above are ready today.

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Frequently asked questions

What forms of strontium citrate can brands buy?

Common forms include standard powder, granulated and blends. Ask each supplier for the specification sheet of the exact grade they quote.

What should the COA for strontium citrate include?

Expect strontium assay, citrate content and identity, calcium and barium, loss on drying and lead and other metals, each with its method, specification and result for that lot.

How should strontium citrate be stored?

Store strontium citrate in tightly closed containers in a cool, dry place. It is stable under normal conditions. Shelf life is set by the supplier's specification, with assay and moisture the usual retest checks.

What is the regulatory status of strontium citrate?

A 2015 Health Canada summary safety review states that in Canada strontium is classified as a natural health product ingredient, found in licensed products as strontium citrate, lactate or gluconate. The same review recommended label updates for products providing adults more than 4 mg of elemental strontium per day, telling consumers not to use them if they have, or are at high risk for, heart disease, circulatory problems or blood clots.

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