Zinc picolinate

These are the amounts published trials administered — not a recommendation, and not a dose to copy. Trial participants were screened, supervised and given a characterised preparation. What is in a retail bottle is frequently not what was studied, and the amount that suits one person is not general advice.

• Studied for Typical retail supplement

  15–50 mg

  Not enough

  Elemental zinc, daily

  Products at 50 mg exceed the 40 mg/day upper limit in a single capsule. Against an RDA of 8–11 mg, that is four to six times the requirement taken indefinitely.

• Studied for Absorption comparison study

  50 mg

  Limited

  Picolinate versus gluconate versus citrate · 4 weeks

  Fifteen participants, published in 1987, measuring hair, urine and blood zinc. It remains the sole basis for the superiority claim and has not been replicated.

This is general information about food, not medical advice. It cannot diagnose, treat or replace guidance from a clinician who knows your history.

Each timing below was actually compared against an alternative in a trial, which is unusual.

• ⏳On an empty stomach

  Moderate

  Absorption is higher fasted and reduced by phytate-rich meals, which has been measured for zinc generally. Nausea often forces people to take it with food anyway.

  Timing was tested. A trial compared this window against another and reported a difference.

• 🕐Any time

  Limited

  Kept apart from copper supplements and, ideally, from calcium and iron, because these minerals compete for absorption. Established from absorption studies rather than outcome trials.

  Timing was tested. A trial compared this window against another and reported a difference.