There is no healthy seed oil. Every version sold as one carries the same fat, and the fat is the problem.
Cold pressed rapeseed oil still oxidises inside you. Pressing it without heat leaves the smell and the vitamin E in, and leaves every polyunsaturated molecule exactly as fragile as the refinery version. It goes into your cell walls and breaks apart there at 37 degrees the same as the cheap stuff.
Organic sunflower oil still oxidises inside you. The pesticide was never what hurt anyone. Two thirds of the bottle is a fat that falls apart in air, light and heat, and an organic sunflower makes exactly the same fat.
High oleic sunflower oil is the industry admitting the ordinary kind was the problem. They bred the polyunsaturated fat down because it kept going rancid in the fryer, and the bottle they sell you is still a solvent-extracted, bleached, deodorised oil from a seed nobody ever ate for its fat.
Flaxseed oil is the most fragile oil you can buy. It is the oil painters use because it hardens in air, it goes rancid in weeks even in the fridge, and the omega-3 it is sold for is the plant kind your body converts at about 1 in 100. The capsule is a bottle of paint base with a health claim.
Grapeseed oil is the worst in the aisle, 70% polyunsaturated, and it is marketed as the clean one. It will do more damage per spoon than the sunflower oil it is sold as an upgrade from.
Walnut, hemp and pumpkin seed oils are the same fat at a higher price. The health shop keeps them in the fridge and tells you to finish them fast because the shop knows what happens to them in a month, and your body is a warm cupboard you cannot open.
Toasted sesame oil is the only one with a tradition, and the tradition was a teaspoon over a finished dish. Fry in it by the cup and you are doing what no Chinese grandmother did, with the same fragile fat as everything above.
Every one of those bottles goes off on a shelf, breaks apart in a pan, and carries on breaking apart in the walls of your cells for the two years it lives there.
A better label does not change a fat. Butter, dripping and tallow have never needed one, because there was nothing in them to go wrong.
Mike