What Does BPA-Free Actually Mean On A Sardine Can?
The phrase BPA-free sardines almost always refers to the can liner, not the fish. Steel cans are coated with an epoxy resin to keep acidic, oily food from corroding the metal. Traditional epoxies were made with bisphenol A. After consumer pressure, most brands swapped BPA for BPS or BPF — chemicals from the same family that the FDA is now actively reviewing for similar endocrine effects.
In other words, "BPA-free" on a sardine can usually means "different bisphenol." The only way to truly avoid all of them is to remove the metal liner from the equation.
Why Sardines Specifically Leach More Than Other Foods
Sardines are oily and often canned with acidic ingredients — lemon, tomato, mustard, vinegar. Both fat and acid are known accelerants for bisphenol leaching from epoxy can liners. So even when BPA exposure from a tomato can is measurable, exposure from a can of sardines in tomato sauce tends to be higher per serving. That is the structural reason a real BPA-free sardines option matters.
How STRONGFISH Solves It
STRONGFISH packs wild-caught sardines in a Tetra Recart carton — a retort-sterilized paperboard package with no metal liner, no epoxy resin, and no bisphenol of any kind in the food-contact layer. Same shelf stability as a can. None of the chemistry. The result is genuinely BPA-free sardines without the asterisk.
You also get a cleaner eating experience. No can opener, no jagged lid, no metallic aftertaste, no oil splatter when you peel the top. Tear, eat, recycle.
What's In The Carton
Wild-caught sardines, cold-pressed extra virgin olive oil, lemon, herbs, and sea salt. 25g of complete protein per carton. Zero seed oils, zero preservatives, zero gums or fillers. The whole product is built so the only thing between you and real food is a paperboard tab.
Where The Sardines Come From
Our sardines are wild-caught from small-boat fleets in the Atlantic, sourced through partners with documented chain-of-custody. Sardines sit at the bottom of the food chain, which means low mercury and low bioaccumulation — another reason they outperform tuna for daily eating.
Join The Waitlist
The founding batch ships October 2026. Reserve your cartons now and lock in founding pricing — the only way to get truly BPA-free sardines from STRONGFISH before retail. Join the waitlist.