🧠What the Research Shows - Probiotics, Synbiotics & Thyroid
A recent systematic review & meta-analysis looked at how probiotics and synbiotics affect thyroid function in adults. 👉 Researchers pooled data from 9 clinical trials examining TSH, Free T3 and Free T4 levels. 🔬 What they found: • TSH significantly decreased • Free T3 and Free T4 significantly increased • Effects were strongest in: People with existing thyroid dysfunction, Interventions lasting ≤ 8 weeks ⚠️ Important: This doesn’t mean probiotics “cure” Hashimoto’s but this is promising evidence! If you’re dealing with both thyroid autoimmunity and histamine sensitivity, strain selection matters. Here are options that are generally well-tolerated, low in fillers, and commonly used in protocols: 1️⃣ MegaSporeBiotic by Microbiome Labs Type: Spore-based (Bacillus species) Why it’s popular in Hashimoto’s protocols: - Shelf-stable soil-based organisms - Minimal excipients - Designed to support gut barrier integrity 💡 Best for: Those wanting strong microbiome modulation without common histamine-producing strains. ⚠️ Start low and go slow if highly histamine sensitive. 2️⃣ Biospora (by Klaire Labs) Type: Spore-based Why it fits: - Clinically used - Minimal fillers - Often well-tolerated in autoimmune protocols 💡 Best for: Thyroid autoimmunity + histamine intolerance. 3️⃣ VitaMonk Low Histamine Probiotic (by VitaMonk) Type: Lactobacillus & Bifidobacterium blend Why it fits: - Designed to avoid histamine-producing strains - Focused on histamine-neutral support 💡 Best for: Those with strong histamine reactions who can’t tolerate many standard probiotics. 🧠 Important Reminder Not everyone with Hashimoto’s needs probiotics. Before starting: - Assess gut symptoms (bloating, constipation, loose stools, reflux) - Consider iron status (low iron is common in thyroid dysfunction) - Evaluate stress load (cortisol impacts gut + thyroid signaling) Probiotics work best as part of a bigger strategy: ✔️ Blood sugar stability ✔️ Nutrient density (especially heme iron, selenium, zinc)