Thyroid nutrition, evidence-based.
Short, cited, no alarmism. Every article is graded by evidence level.
'Adrenal Fatigue' and Thyroid Disease: Separating Myth from Real Medicine
'Adrenal fatigue' is not a recognized medical diagnosis. Learn why it's a myth, what the real diagnoses are, and how it overlaps with undertreated hypothyroidism.
Biotin and Thyroid Labs: Why Your Supplement May Be Skewing Your Results
High-dose biotin supplements cause falsely low TSH and falsely high T3/T4 on standard lab tests. The FDA warned about this in 2017. Here's what to do.
Calcium, Iron, and Levothyroxine: The 4-Hour Rule
Calcium and iron levothyroxine interactions can cut absorption by 25-30% and push TSH from 1.6 to 5.4. Why the 4-hour rule matters and how to apply it.
Coconut Oil and the Thyroid: What the Evidence Actually Shows
Does coconut oil help the thyroid? No high-quality clinical trial supports it. What the research shows about MCTs, metabolism, and LDL cholesterol risk.
Coffee and Levothyroxine Timing: The 60-Minute Window
Coffee levothyroxine timing matters more than most patients are told. Benvenga 2008 found about 36% less T4 absorption when taken together. Wait 60 min.
Curcumin and Hashimoto's: What the Research Actually Shows
Curcumin may reduce TPO antibodies and inflammation in Hashimoto's, but poor absorption is the catch. Here's what the RCTs actually found.
Dairy and Hashimoto's: When It Matters and When It Doesn't
Dairy and Hashimoto's: lactose intolerance can interfere with levothyroxine, but no trial shows dairy elimination lowers thyroid antibodies. What to do.
Fiber Supplements and Levothyroxine: The 4-Hour Rule That Protects Your Dose
Dietary fiber and fiber supplements like psyllium can bind levothyroxine in the gut and reduce absorption. Learn the simple timing rule that prevents this.
Fluoride and the Thyroid: What the Evidence Actually Says
Does fluoride harm your thyroid? An honest look at fluoridated water, hypothyroidism, iodine sufficiency, and what the dose-response evidence really says.
Generic vs Brand Levothyroxine: Does It Matter?
Generic vs brand levothyroxine: neither is inherently better. The FDA calls it a narrow-therapeutic-index drug, so consistency and TSH retesting matter most.
Gluten-Free and Hashimoto's: What the Evidence Actually Says
Gluten free and Hashimoto's: essential if you also have celiac disease, optional and mixed-evidence for everyone else. What the research actually shows.
Intermittent Fasting and Thyroid Health: What the Evidence Actually Says
Intermittent fasting temporarily lowers T3 in healthy people. For hypothyroid patients on levothyroxine, timing matters. Here's what research shows.
Iodine and Hypothyroidism: Why More Is Not Better for Hashimoto's
Iodine and hypothyroidism have a U-shaped relationship: too little causes deficiency, too much can worsen Hashimoto's. What WHO, NIH, and the ATA actually say.
Iron Deficiency and Thyroid: Why Low Ferritin Mimics Hypothyroid Symptoms
Iron deficiency and thyroid symptoms overlap: TPO needs iron to build hormone, and low ferritin can leave you exhausted even when your TSH looks fine.
Is Broccoli Bad for Hypothyroidism? The Goitrogen Myth, Examined
Is broccoli bad for hypothyroidism? In normal cooked portions with adequate iodine, no. Here is what the human evidence on goitrogens really shows today.
Is Soy Safe for Hashimoto's? What the Research Actually Shows
Is soy safe with Hashimoto's? Clinical trials show soy doesn't meaningfully harm thyroid function in iodine-replete adults. The real rule: timing it apart.
Leaky Gut and Hashimoto's: Separating Emerging Science from Wellness Hype
Can 'leaky gut' worsen Hashimoto's? Here's what the emerging science on intestinal permeability and thyroid autoimmunity actually shows.
Levothyroxine on an Empty Stomach: Why Timing Matters
Levothyroxine empty stomach: why it matters. Acidic, food-free conditions let the tablet dissolve and reach the small intestine for 70-80% absorption.
Magnesium and Thyroid Function: What the Evidence Actually Shows
Does magnesium help your thyroid? The biochemistry is real, observational data hints at a link, but no monotherapy trial has proven a thyroid benefit yet.
Mediterranean vs. AIP for Hashimoto's: What the Evidence Shows
Mediterranean vs. AIP for Hashimoto's: a large RCT and a 17-trial meta-analysis back Mediterranean; AIP rests on two small uncontrolled pilots. Evidence inside.
Myo-Inositol and Hashimoto's: A Promising but Small Evidence Base
Small Italian RCTs show myo-inositol plus selenium may lower TPO antibodies and TSH in Hashimoto's — here's what the evidence actually says and what's missing.
Nightshades and Hashimoto's: What the Evidence Actually Shows
Should people with Hashimoto's avoid tomatoes, peppers, and eggplant? Here's what the limited evidence on nightshades and thyroid autoimmunity actually shows.
Omega-3 Fatty Acids and Thyroid Health: What the Research Actually Shows
Omega-3s show anti-inflammatory promise for Hashimoto's, but the evidence is emerging — here's what studies actually found and what it means for you.
Probiotics and Hashimoto's: What the Gut-Thyroid Research Shows
Research links gut dysbiosis to Hashimoto's autoimmunity. Here's what RCTs and meta-analyses actually show about probiotics and thyroid health.
Proton Pump Inhibitors and Levothyroxine: Why Your Heartburn Drug May Be Raising Your TSH
PPIs like omeprazole and pantoprazole raise stomach pH and impair levothyroxine absorption. Learn how to manage this clinically important drug interaction.
Selenium and Hashimoto's: What the Research Actually Shows
Selenium and Hashimoto's: a 2010 meta-analysis showed 200 mcg/day lowered TPO antibodies in 3 months. See what the evidence shows, and where it's weaker.
Sugar and Thyroid Inflammation: What Hashimoto's Patients Need to Know
High refined sugar intake drives systemic inflammation that may worsen Hashimoto's. Learn what the research actually says and practical steps to cut back.
T3/T4 Combination Therapy: Is Adding Liothyronine Right for You?
Still feeling unwell on levothyroxine with a normal TSH? Learn what the research says about adding T3 (liothyronine) and who may actually benefit.
The Alkaline Diet and Thyroid Health: Why pH Has Nothing to Do with It
Does eating alkaline foods boost thyroid function? The evidence is clear: diet cannot meaningfully change your blood pH. Here's what the science shows.
Vitamin B12 and Hypothyroidism: Why Deficiency Is So Common and What to Do About It
B12 deficiency is common in Hashimoto's and hypothyroidism — often causing fatigue and brain fog that mirror thyroid symptoms. Here's why it happens and when to test.
Vitamin D and Hashimoto's: What the Evidence Actually Shows
Vitamin D and Hashimoto's: low levels are common and small RCTs show modest antibody drops, but causation is unsettled — test 25(OH)D before supplementing.
Zinc and Thyroid Function: What the Evidence Actually Shows
Does zinc help the thyroid? It's a cofactor for T4-to-T3 conversion, but RCT evidence is small, mostly outside Hashimoto's, and limited and inconsistent.