Mineral

Zinc (as Zinc Sulfate)

Also known as: zinc sulfate, zinc sulphate, ZnSO4

Evidence

Zinc sulfate is an inorganic zinc salt with moderate bioavailability, used in supplements for immune function, wound healing, and protein synthesis. Absorption is better on an empty stomach but may cause nausea.

Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.

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Primary uses

immune function
wound healing
protein synthesis
enzyme function

How it works

cofactor for 100+ enzymes
supports T-cell and B-cell function
antioxidant activity

Dosage

Typical range: 8–15 mg daily (elemental zinc for adults)
Timing: best absorbed on empty stomach, but may take with food if GI upset occurs
With food: Food reduces absorption; take 1–2 hours apart from calcium, iron, magnesium
Duration: Long-term use >25 mg daily may impair copper absorption; avoid exceeding UL of 40 mg daily
Special populations: Pregnant/lactating women: 11–13 mg daily; vegetarians may need higher intake

Forms

zinc sulfate· 70/100

Safety

Common side effects

nausea
metallic taste
abdominal cramping

Contraindications

copper deficiency (zinc excess impairs copper absorption)

Products containing Zinc (as Zinc Sulfate)

Top-scoring supplements in our catalog that list Zinc (as Zinc Sulfate) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.

Thorne

Zinc Bisglycinate 30 mg

Thorne

Zinc Picolinate 30 mg

Thorne

Zinc Bisglycinate 15 mg

Nutricost

Calcium + Magnesium + Zinc Citrates with Vitamin D3 Powder

See all products →

Evidence notes

Zinc has good evidence for immune support and wound healing; sulfate form has moderate bioavailability compared to glycinate or picolinate.

Grade B: Some human trials support key claims; further confirmation needed.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.