Delicious Science with Dr Joanna McMillan

Iron Deficiency in Women

2026-02-0627:10

Delicious Science with Dr Joanna McMillan is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber.Many women are walking around with low iron stores, feeling exhausted, brain foggy, and unaware their symptoms stem from something as fixable as micronutrient deficiency. Yet blood tests often miss the first signs—because iron deficiency symptoms happen long before anaemia. In this eye-opening episode, I talk about how small fluctuations in iron levels can quietly sabotage your energy, mood, and recovery long before your blood work shows any concerns.You’ll discover why women, especially those with heavy periods, pregnancy, or restrictive diets, are naturally more vulnerable to iron deficiency. I break down how iron fuels more than just oxygen transport—you’ll learn its vital roles in brain health, immune function, and overall energy. I introduce the concept of the “iron gatekeeper,” hepcidin, a hormone that regulates iron absorption and explains why your body might block iron even when you’re supplementing heavily or eating iron-rich foods.This episode provides practical strategies for boosting iron absorption naturally. From pairing plant-based iron sources with vitamin C-rich foods to timing your tea and coffee consumption away from meals, you’ll get clear guidance on how to optimise your diet. I give you insights tailored for women at every life stage, from teens to postmenopause. The stakes are high: untreated iron deficiency can diminish your physical performance, slow recovery, and impair cognitive function—yet it’s often overlooked until more severe anaemia develops. Learning to interpret your ferritin levels, understanding the influence of inflammation and chronic stress on iron regulation, and knowing when to seek medical guidance can empower you to take control of your health.If you’re tired, foggy, or just wanting to feel sharper and more energised—especially if symptoms don’t improve with sleep or stress management—this episode is essential listening. It’s your straightforward guide to understanding, diagnosing, and fixing iron deficiencies before they take a bigger toll. Don’t wait until fatigue becomes a crisis—arm yourself with science-backed strategies today. Get full access to Delicious Science with Dr Joanna McMillan at drjoannamcmillan.substack.com/subscribe