Five nutrients most Western diets quietly miss

We've watched a lot of weekly summaries. The deficiencies cluster. Here are the five we see most often, and the foods that actually close the gap.

1. Iron#

Common, especially in women of menstruating age and people who don't eat red meat. Symptoms hide: low energy that feels like a personality trait.

What helps: lentils, beef liver, dark leafy greens cooked with a squeeze of lemon (vitamin C improves non-heme absorption ~3x), pumpkin seeds.

2. Magnesium#

Found in foods most diets don't include daily. Soil depletion makes it worse than the database suggests.

What helps: dark chocolate (yes, really), pumpkin seeds, almonds, black beans, cooked spinach.

3. Omega-3 (EPA + DHA)#

Different from the ALA in flax. Cold-water fish is the cheap fix; the omega ratio matters more than total grams.

What helps: sardines, salmon, mackerel two times a week. Algae oil if vegan.

4. Vitamin D#

Latitude-dependent. If you live above 40 degrees and it's October-April, you're probably low.

What helps: fatty fish, fortified milk, mushrooms exposed to sunlight, sun on bare skin in summer. Supplement if your bloodwork says so.

5. Iodine#

Quietly disappearing from Western diets as iodised salt usage drops.

What helps: seaweed (even small amounts), eggs, dairy, white fish.

What the app does#

Logs your meals, checks each of these against your RDA, and surfaces a flag when one stays low for two weeks. Not when you hit zero for a day. The short-term variance doesn't matter. The chronic baseline does.