Your Immune System Isn't Weak — It's Malnourished (Test These Nutrients)

Sources and fact-check: https://app.winnow.so/sources/drmicha... Your immune system isn't weak — it's malnourished; test these nutrients properly If you're sick more often than everyone around you, the problem might be supply, not weakness. In this video I look at why some people catch everything going, and why "what can I take to boost my immune system?" is the wrong question. I explain how the immune system depends on a supply chain of specific nutrients, why deficiency often hides behind normal-looking blood tests, and why I'd test before I'd supplement. — What you’ll learn — • Why 'boosting' isn't a real thing, and what actually matters instead • How you can be iron deficient long before you're anaemic, so a normal blood count doesn't rule it out • What the evidence really says about zinc lozenges and colds • Why vitamin D thresholds disagree, and what that means for you • How high-dose zinc can create a copper deficiency that wasn't there before Subscribe if you want honest, evidence-based videos like this. This is general information, not personal medical advice — speak to your own doctor before changing anything. — Chapters — 0:00 Sick again and again 0:42 Not weak — malnourished 4:01 The nutrients with real evidence 14:39 Test before you supplement — Sources & references — • Thresholds disagree: Endocrine Society calls ‹20 ng/mL deficient; the Institute of Medicine calls ≥20 sufficient and ‹12 deficient — Holick et al., JCEM 2011 96(7):1911-30; IOM DRI Calcium & Vitamin D 2011 (via NIH ODS) https://academic.oup.com/jcem/article... https://ods.od.nih.gov/factsheets/Vit... https://www.nationalacademies.org/rea... • Zinc lozenges — RCT meta-analyses show ~33% shorter colds; sucked, not swallowed (Hemilä, Open Respir Med J 2011; JRSM Open 2017) — Hemilä, Open Respir Med J 2011 & JRSM Open 2017 (zinc lozenge RCT meta-analyses) https://pubmed.ncbi.nlm.nih.gov/21769... https://journals.sagepub.com/doi/10.1... https://www.cochranelibrary.com/cdsr/... • You can be iron deficient long before you are anaemic — a normal blood count does not rule it out — WHO ferritin guideline 2020; NICE CKS Anaemia – iron deficiency; Camaschella, Blood 2019 https://www.ncbi.nlm.nih.gov/books/NB... https://ashpublications.org/blood/art... https://patient.info/doctor/haematolo... • Vitamin A supplementation cuts child mortality from diarrhoeal illness (~12%); deficiency raises measles severity — Imdad et al., Cochrane Database Syst Rev 2022 (CD008524.pub4); WHO Guideline 2011 https://www.cochrane.org/evidence/CD0... https://www.ncbi.nlm.nih.gov/books/NB... https://www.who.int/publications/i/it... • Common genetic variants can cut beta-carotene conversion by a third to two-thirds — and the enzyme needs adequate thyroid hormone and zinc — Leung/Lietz et al., FASEB J 2009; Lietz et al., J Nutr 2012 https://pubmed.ncbi.nlm.nih.gov/19103... https://pubmed.ncbi.nlm.nih.gov/22113... https://en.wikipedia.org/wiki/Beta-ca... • High-dose zinc can block copper absorption and create a copper deficiency that was not there before — NIH ODS Zinc & Copper fact sheets; EFSA/IOM DRI for zinc (UL rationale: copper status) https://ods.od.nih.gov/factsheets/Zin... https://ods.od.nih.gov/factsheets/Cop... https://www.ncbi.nlm.nih.gov/books/NB... — Important context — This describes a single clinical observation, not a general treatment recommendation. On this — “Deficiencies rarely travel alone — iron, B12, vitamin D and omega-3 often found low together” — the broader scientific evidence is currently mixed. Individual responses can differ from population-level results. Always discuss with your own clinician. This describes a single clinical observation, not a general treatment recommendation. On this — “A toddler, months of recurrent eye infections on repeated antibiotics — found vitamin A deficient; diet plus supplementation and the infections stopped” — the broader scientific evidence is currently mixed. Individual respo Medical disclaimer: This video is for general information and education only. It is not medical advice and is not a substitute for a consultation with a qualified healthcare professional. Always seek the advice of your own doctor or another qualified clinician about any medical condition or before making any decision about your health. Never disregard professional medical advice, or delay seeking it, because of something you have watched here. ▶ Watch next — Why a 'normal' blood test can still miss low iron:    • Why a 'normal' blood test can still miss l...