The Eating Habits I Thought Were Healthy Were Quietly Harming Me

I ate what I had always been told was a good diet - I avoided fast food, I cooked at home most nights, I did not eat excessive sugar by most conventional measures.

I had internalised a framework of healthy and unhealthy that I had assembled from years of ambient information and applied consistently enough to feel confident that food was not something I needed to worry about.

I was 26 and I felt tired in a way that seemed out of proportion to my lifestyle but that I attributed to work stress and poor sleep rather than anything dietary. A routine blood test came back with results that my GP in Busan walked me through with some patience.

My iron levels were significantly low, which explained a lot of the fatigue. My vitamin D was deficient, which is common in South Korea where indoor working culture and protective sun habits mean deficiency is widespread but often undetected.

My overall dietary picture, when I described it to the dietitian I was referred to, turned out to have several significant gaps that my confident sense of eating well had entirely masked. I was not eating enough iron-rich foods or pairing them with anything that would enhance absorption. My protein intake was inconsistent.

My vegetable consumption, which I would have scored myself highly on, was actually narrow - I was eating the same five or six vegetables repeatedly and missing entire nutrient categories. The dietitian did not make me feel foolish about this.

She said most people's sense of how well they eat is genuinely calibrated to the information they received growing up and that information is frequently incomplete. The gap between feeling like you eat healthily and actually meeting your nutritional needs is common and fixable.

The adjustments I made over the following months were not dramatic - adding specific foods, changing some pairings, becoming slightly more intentional about variety. The effect was significant. The fatigue that I had normalised over two years lifted to a degree that felt almost unfair in how clearly it had been preventable.

Within four months my iron and vitamin D levels had normalised. I tell this story because I think the most dangerous nutritional situation is not ignorance but confident incomplete knowledge - a belief that you are covering the bases when the actual picture is more complex.

A blood test and sixty minutes with a dietitian gave me more useful information than years of self-directed eating based on good intentions.