Proposed open letter

Put micronutrients on the policy agenda

Intended audience: Agriculture and public-health policymakers

The proposed ZincThink initiative invites a closer conversation between agriculture and public health. Zinc is a useful starting point because it links questions about soil, crops and nutrition. The evidence calls for careful, locally grounded programmes.

Three proposals for discussion

1. Establish the need. Invest in locally appropriate soil testing and make results understandable to farmers. Identify where zinc deficiency is a meaningful agronomic constraint before recommending intervention.
2. Connect disciplines. Bring agronomists, nutrition researchers and community representatives into programme design. Distinguish better crop performance from demonstrated human-health outcomes.
3. Evaluate openly. Use transparent study designs, report costs and publish both positive and null findings. Avoid treating a result from one setting as a universal recommendation.

We propose an evidence-led agenda that values nutritional adequacy, farmer livelihoods and environmental stewardship together. This letter is a starting point for discussion, with no claim of institutional endorsement.