Dietary Recommendations for Hypoferritinemia While Remaining Gluten and Dairy Free

Understanding Iron Absorption on Restricted Diets

For individuals with hypoferritinemia following gluten-free and dairy-free diets, consuming iron-rich plant foods paired with vitamin C sources at each meal is essential for optimal iron absorption, potentially supplemented with oral iron if dietary measures are insufficient, as recommended by The Lancet Planetary Health 1, 2
Focus on consuming iron-rich plant foods such as pulses and gluten-free grains as primary sources of non-heme iron, with a bioavailability of approximately 1-15%, according to The Lancet Planetary Health 1, 2
Non-heme iron from plant sources has lower bioavailability compared to heme iron from animal sources, which has a bioavailability of 15-40%, as stated by The Lancet Planetary Health 2, 3
If not vegetarian/vegan, include lean meats and seafood which provide highly bioavailable heme iron, as suggested by the British Journal of Sports Medicine 4

Pair iron-rich foods with vitamin C sources at each meal, as vitamin C is a powerful enhancer of non-heme iron absorption, according to The Lancet Planetary Health 2, 3
Examples of vitamin C-rich foods include citrus fruits, strawberries, kiwi, bell peppers, and tomatoes, as listed by The Lancet Planetary Health 1, 2
Avoid consuming tea and coffee around mealtimes as they contain compounds that impair iron absorption, as advised by the British Journal of Sports Medicine 4

Consider oral iron supplementation when dietary measures alone are insufficient to correct hypoferritinemia, as recommended by Nature Reviews Gastroenterology and Hepatology 5, 6
In celiac disease, iron deficiency may persist despite strict adherence to a gluten-free diet in up to 20% of patients, according to Clinical Gastroenterology and Hepatology 7

Ensure adequate calcium intake through calcium-rich plant foods, such as green leafy vegetables like kale, bok choy, and turnip greens, which have a high calcium absorption rate, as stated by The Lancet Planetary Health 2
Good dairy-free calcium sources include calcium-fortified plant-based milks, calcium-set tofu, and calcium-rich mineral waters, as listed by The Lancet Planetary Health 2
Avoid high-oxalate vegetables like spinach and rhubarb when seeking calcium sources, as they have poor calcium bioavailability, according to The Lancet Planetary Health 2

Avoid excessive fiber intake at the same time as iron-rich meals, as it can inhibit iron absorption, as warned by The Lancet Planetary Health 1, 2
Do not rely solely on spinach as an iron source despite its high iron content, as its bioavailability is poor, as stated by The Lancet Planetary Health 2
Avoid taking calcium supplements at the same time as iron-rich meals or iron supplements, as calcium can inhibit iron absorption, as advised by the British Journal of Sports Medicine 4