This post contains affiliate links. If you buy through them, The Healthy RD may earn a small commission at no extra cost to you. I only include products I would recommend to my own clients. By Heidi Moretti, MS, RD, CLT — registered dietitian with 25+ years in functional nutrition and gut health, Certified LEAP
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Updated September 2026 with current research, new FAQs, and a personal update on hair health. Written and medically reviewed by Heidi Moretti, MS, RD, CLT — Registered Dietitian, Certified LEAP Therapist, and author of Cortisol Fix, Gut Fix, Period Fix, and The Whole Body Guide to Gut Health, with 25+ years of clinical experience in
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✦ Quick Answer Research on the gut-skin axis has moved fast since 2025: a 2026 meta-analysis found probiotics improve acne severity scores (though not raw lesion counts), a 2026 systematic review confirmed moderate benefit for eczema, and new topical postbiotic research shows Akkermansia muciniphila derivatives boost collagen and hyaluronic acid production directly in skin cells.
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Riboflavin (Vitamin B2): The Overlooked Vitamin Powering Your Gut, Brain, and Energy (2026 Research Update) Quick Answer: Riboflavin (vitamin B2) is a water-soluble vitamin your body needs to make cellular energy, recycle glutathione, and activate other B vitamins like folate, B6, and B12. New 2025–2026 research shows it also reshapes the gut microbiome at colon-targeted
Postbiotics: Discover Their Multifaceted Benefits (2025 Research Update) | The Healthy RD The Healthy RD — Functional Nutrition & Natural Medicine by Heidi Moretti, MS, RD 🔬 Updated with 2024–2025 Research Postbiotics: Discover Their Multifaceted Benefits The unsung heroes of gut health — how fermentation’s powerful byproducts transform immunity, mood, skin, longevity, and beyond. By
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Like most medicinal mushrooms, Tremella mushroom benefits are likely vast, yet underappreciated. This beautiful mushroom has been used in Traditional Chinese Medicine for thousands of years to enhance beauty. It also is traditionally used to strengthen the immune system and much more. Yet there is so much we don’t know, based on science, about this beauty mushroom