Are THCA carts trustworthy?

Some are; the category earns more scrutiny than flower, not less. Oil concealed in a cartridge is where history’s worst additives hid (the 2019 vape-injury outbreak traced to vitamin E acetate), so the bar is a finished-product COA covering potency plus residual solvents and additives — potency-only paperwork answers the least important question. Hardware quality is also health-adjacent: research has flagged metal leaching from cheap cart components. Our cart reviews check the paper first, the hardware second, the flavor third — in that order, on purpose.