Reading a lab report like a food scientist

MiamiNuts test reports are available by email on request. Most brands hope you never look at theirs; we would rather teach you to read one like a food scientist — because once you can, you will start asking every snack brand the same four questions, and that is good for everyone.

First: what NABL actually means

NABL — the National Accreditation Board for Testing and Calibration Laboratories — does not test food. It audits the labs that do: their methods, instruments, calibration and staff, against the international standard ISO/IEC 17025. A result from an NABL-accredited lab means the measurement itself is trustworthy. That distinction matters: “lab tested” on a wrapper is meaningless if the lab is the company’s own back room. Look for the accreditation number and scope on the report header.

The four panels that matter

A dry-fruit or makhana report will usually carry four families of tests. Here is what each is really asking:

1. Aflatoxins

The non-negotiable one. Aflatoxins are toxins produced by moulds that grow on nuts and grains stored damp — invisible, tasteless and genuinely harmful over time. FSSAI’s Contaminants, Toxins and Residues Regulations (reg 2.2.1, as of October 2026) cap total aflatoxins in nuts at 15 µg/kg (ppb) with a lower cap of 10 µg/kg for aflatoxin B1. On the report you want to see either values far below the limit or “BLQ / not detected” — below the limit of quantification. This is the single line that makes fast, dry, tested supply chains worth paying for; we explain how makhana is popped in Why sand?.

2. Heavy metals

Lead, cadmium, arsenic, mercury — these arrive from soil and water, not handling, which is why where a crop grows matters. Limits are set per metal (lead in most foods: 2.5 mg/kg under FSSAI, far lower for many categories). Again: numbers well under the cap, or “not detected.”

3. Pesticide residues

Usually reported as a multi-residue screen covering dozens of molecules at once. The honest summary line is “none detected above MRL” — maximum residue limits. Makhana has a structural advantage here: the part you eat spends its life sealed inside a hard shell.

4. Moisture and microbiology

The freshness panel. Moisture percentage predicts crunch and shelf life (popped makhana should sit around 4–6%; higher, and it will chew, then stale). Yeast, mould and coliform counts tell you the packing line is clean. These numbers are why a report is per-batch, not per-year — they change with every roast.

Reading the numbers like a scientist

Three habits carry you through any report. Check the units — µg/kg (ppb) and mg/kg (ppm) differ a thousandfold, and confusing them makes safe numbers look scary. Compare against the printed limit, which any honest report states alongside the result; a value one-tenth of the cap is a good result, not a warning. Prefer “not detected” over silence — a report that omits a panel didn’t pass it, it skipped it.

And one habit for the brand, not the number: match the batch. The report’s batch code should equal the one printed on your pack. A framed certificate from 2023 on a website is decor; a report that matches the pack in your hand is proof.

Try it on a real one

Our test reports are available by email on request — ask us for one and read it with this guide beside you.

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