Dear Eat Naked, is “sunflower oil” bad for you? If I ever buy packaged food items, I consistently examine the ingredients. I bought these plantain chips that have salt and sunflower oil. Is that terrible? – Rosanna A.

The short answer? Avoid the sunflower oil in packaged foods – even the “organic” and “natural” and “healthy” options.

Why? Well, that takes a little more explanation. Here is the bigger picture.

There is no naturally-occurring fat (as in: not artificially and chemically altered, or over-processed) that is “good” or “bad” for you in and of itself. All fats, no matter their origin (animal or vegetable) or structure (saturated or unsaturated), have important roles in the human body.

The key considerations for fats are two-fold:
(1) how was it processed? and
(2) how does it fit in the broader context of the diet?

How was it processed?

If a fat or oil – particularly a more structurally unstable oil (as any unsaturated oil will be, by definition) – has been heated, bleached, deodorized, or altered in any way that damages the integrity of the fat (turns it rancid) – then it is extremely inflammatory and toxic to the body and best avoided. The most life-giving, organic oil can be rendered toxic very quickly through improper processing, storage and use.

How do you know how an oil is processed? Well, it’s a little more challenging but in the case of sunflower oil we know that it’s a very unstable oil, being mostly polyunsaturated. For the nutrition nerds out there, here’s a breakdown of the fatty acid content:

Fatty acid profile of sunflower oil (source)
Palmitic acid (saturated): 4–9%
Stearic acid (saturated): 1–7%
Oleic acid (monounsaturated omega-9): 14–40%
Linoleic acid (polyunsaturated omega-6): 48–74%

We also can assume that if it’s been used in a packaged good, it has more than likely been exposed to high heats and significant damage from the processing. Which means we want to avoid any packaged food that has this ingredient unless it is a raw food and you’re aware of the quality of the sunflower oil they used to begin with. If it’s in a raw food and you know the sunflower oil is of good quality and was cold pressed, this brings us to the next question:

How does it fit into the broader context of the diet?

Assuming the oil is completely unprocessed (i.e., cold pressed, stored in a dark container to prevent light damage – yes, these oils are that delicate) and pure, then we need to look at its broader context in the diet. This is a little trickier to do because it varies depending on what you typically eat. In the case of vegetable oils, most of us get far too many of them, not too few.

Most vegetable oils are high in Omega 6 fatty acids (sunflower oil is no exception as you can see from the table above). Historically, our diets had a ratio of 1:1 Omega 3 to Omega 6. The optimal ratio for human health is anywhere from 1:1 to 1:3. In today’s diet, we have anywhere from 1:15 to 1:30—wildly skewed to far too many Omega 6s.

And so, in most cases, opting out of a food that has added omega-6 rich vegetable oils is a good idea. By this criteria, you’d still want to pass on the packaged food with added sunflower oil, regardless of its quality and processing.

Is there ever a time for consuming vegetable oils? There can be, but that’s a topic for another day and another post… 

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