Great question. When my daughter was first diagnosed with celiac disease, I went down a rabbit hole of research-and this was one of the first things I stumbled on. It turns out the answer is a clear yes, but the "why" and the "how to fix it" are where things get interesting. Let me share what I've learned from digging into the science, talking to dietitians, and living through this with my family.

Why celiac disease leads to nutrient gaps

Celiac disease isn't just about avoiding gluten-it's an autoimmune condition where gluten triggers the immune system to attack the lining of the small intestine. That lining is covered in tiny finger-like projections called villi, which are responsible for absorbing nutrients from food. When those villi are damaged, absorption takes a serious hit, even if you're eating a balanced diet.

The most common deficiencies I've seen in research and in our own experience include:

• Iron - This is the big one. Iron absorption happens primarily in the duodenum, the first part of the small intestine, which is often the most damaged in untreated celiac disease. Iron deficiency anemia is super common-fatigue, pale skin, brain fog-all things that can feel like "just being a tired parent" but are actually a red flag.
• Vitamin D - Fat-soluble vitamins (A, D, E, K) need fat and healthy villi to be absorbed. Vitamin D is especially tricky because it's also dependent on sun exposure and many people are already low.
• B vitamins - Folate (B9) and B12 are absorbed in the small intestine too. B12 deficiency can cause nerve issues, memory problems, and fatigue that feels relentless.
• Calcium and magnesium - These minerals are absorbed in the same damaged area. Calcium deficiency can lead to bone density issues over time, which is why celiac is linked to osteoporosis.
• Zinc - This mineral is critical for immune function and wound healing. Low zinc can show up as slow-healing cuts, frequent colds, or even changes in taste and smell.

How to address these deficiencies (without going crazy)

The good news is that once the gluten-free diet is strictly followed, the gut lining can heal-and with it, nutrient absorption improves. But that healing takes time, sometimes months to years, especially in adults. So in the meantime, here's what I've found helpful:

1. Prioritize nutrient-dense, naturally gluten-free foods

The biggest mistake I made early on was reaching for processed gluten-free snacks and breads. Many of those are made with refined starches and have less fiber, iron, and B vitamins than their gluten-containing counterparts. Instead, I focus on whole foods that are naturally rich in the nutrients we need:

• Iron: Red meat, lentils, chickpeas, dark leafy greens, pumpkin seeds. Pair plant-based iron with vitamin C (like bell peppers or citrus) to boost absorption.
• Vitamin D: Fatty fish (salmon, sardines), egg yolks, and fortified foods. A supplement is often necessary, especially in winter.
• B vitamins: Eggs, meat, fish, nutritional yeast (which is a lifesaver for B12), and gluten-free oats (look for certified gluten-free).
• Calcium: Canned salmon with bones, fortified plant milks, leafy greens, almonds.
• Zinc: Oysters (if you can get them), beef, pumpkin seeds, cashews, chickpeas.

2. Consider targeted supplements-but carefully

Supplements aren't one-size-fits-all, and it's really important to work with a healthcare provider to test for deficiencies before starting anything. Over-supplementing can cause its own problems. That said, here's what I've learned about common supplements for celiac:

• Iron: A gentle form like iron bisglycinate is less likely to upset the stomach. Pair with vitamin C and avoid taking with coffee or tea, which block absorption.
• Vitamin D3: Most people with celiac need a higher dose than the standard recommendation. A blood test can guide the right amount.
• B12: Sublingual (under the tongue) or methylated forms are better absorbed than standard tablets for people with gut issues.
• Multivitamin: Look for one that's specifically formulated for celiac or malabsorption-often with higher doses of the nutrients mentioned above.

3. Focus on gut healing

The gluten-free diet is the foundation, but other things can support healing:

• Bone broth (if tolerated) - Rich in collagen and amino acids that support gut lining repair.
• Fermented foods - Sauerkraut, kimchi, and dairy-free yogurt (if you tolerate it) can help rebuild healthy gut bacteria.
• L-glutamine - An amino acid that some research suggests supports intestinal health. I've seen it recommended by functional medicine practitioners, but always check with a doctor first.

4. Watch for hidden gluten

Even small amounts of cross-contamination can keep the gut inflamed and prevent nutrient absorption. This is where reading labels becomes a second language. I look for "certified gluten-free" on packaged foods, especially oats, soy sauce, and processed items. And when I'm cooking at home, I keep separate toasters, colanders, and cutting boards to avoid cross-contact.

A note on comfort food and real ingredients

When you're dealing with celiac, food can feel like a minefield. That's why I've come to love meals that are simple, clean, and made with ingredients I can actually pronounce. Things like a hearty bowl of ramen made with organic noodles and a clean, savory seasoning-no artificial flavors, no hidden gluten. That kind of comfort food, made better, is what keeps us going. It's not about deprivation; it's about finding what works for your body and your family.

The bottom line

Celiac disease absolutely can cause vitamin deficiencies-but with a strict gluten-free diet, a focus on nutrient-dense whole foods, and targeted supplementation under medical guidance, those gaps can be closed. It takes patience, but the body has an incredible ability to heal. And in the meantime, you can still enjoy food that feels like home.