{"podcast":{"title":"Dr. John Campbell","slug":"dr-john-campbell-7851784","podcast_index_feed_id":7851784,"rss_url":"https://feeds.megaphone.fm/VG9554039150","website_url":null,"image_url":"https://megaphone.imgix.net/podcasts/7a133470-32e4-11f1-ae26-ef5a830a5f06/image/aacd596ff9b51467520b0238cfcd1c87.png?ixlib=rails-4.3.1&max-w=3000&max-h=3000&fit=crop&auto=format,compress","author":"Campbellteaching","episode_count":480,"summary":"Hello Everyone, My name is John Campbell and I am a retired Nurse Teacher and former clinical nurse based in England. I also do some teaching in Asia and Africa when time permits. These videos are to help students to learn the background to all forms of health care. My PhD focused on the development of open learning resources for nurses nationally and internationally. LinkedIn profile, https://www.linkedin.com/in/dr-john-campbell-5256223b/ Twitter, https://twitter.com/Johnincarlisle Disclaimer; These media including videos, book, e book, articles, podcasts are not peer-reviewed. They should never replace individual clinical judgement from your own health care provider. No media-based material on this channel is suitable for using as professional medical advice. All comments are also for educational purposed only and must never replace advice from your own health care provider","last_synced_at":"2026-07-23T10:19:57.883522+00:00","page_url":"https://stenobird.com/podcast/dr-john-campbell-7851784"},"episode":{"title":"Vitamin D levels advised","slug":"vitamin-d-levels-advised","published_at":"2026-07-22T16:30:00+00:00","page_url":"https://stenobird.com/podcast/dr-john-campbell-7851784/vitamin-d-levels-advised","show_page_url":"https://stenobird.com/podcast/dr-john-campbell-7851784","url":"https://traffic.megaphone.fm/VG9612382555.mp3","audio_url":"https://traffic.megaphone.fm/VG9612382555.mp3","summary":"Read the link to the original paper, https://www.mdpi.com/2072-6643/13/10/3596 Deficiency of vit D limits the performance of systems resulting in, increased spread of diseases of civilization Reduced protection against infections Reduced effectiveness of vaccination Covid fatality rates correlate with, Elderly, dark, black people, comorbidities, winter Blood level of 20 ng/mL, (50 nmol/L) sufficient to stop osteomalacia Preferable, 40–60 ng/mL (100 to 150 nmol/L) Vitamin D3 receptors Bone Intestine Pancreas Prostate Immune system cells Vitamin D is a powerful epigenetic regulator Influencing more than 2,500 genes Cancer Diabetes mellitus Acute respiratory tract infections Viral lung infections that cause ARDS Chronic inflammatory diseases Autoimmune diseases Multiple sclerosis Immunomodulatory properties Regulating innate and adaptive immune systems D3 receptors Monocytes/macrophages T cells B cells Natural killer (NK) cells Dendritic cells (DCs) Supplements Without calcium supplementation, even very high vitamin D3 supplementation does not cause vascular calcification Vitamin D3 supplementation in the range of 4000 to 10,000 units (100 to 250 µg) needed to generate an optimal 40–60 ng/mL (100 to 150 nmol/L) has been shown to be completely safe when combined with approximately 200 µg vitamin K2 https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-k/ However, this knowledge is still not widespread in the medical community, and obsolete warnings about the risks of vitamin D3 overdoses unfortunately are still commonly circulating. ARDS and cytokine release syndrome Vitamin D3 is able to inhibit the underlying metabolic pathways Vitamin D3 has a protective role against ARDS caused by SARS-CoV-2. A rapidly increasing number of publications are investigating the vitam…","meta_description":"Read the link to the original paper, https://www.mdpi.com/2072-6643/13/10/3596 Deficiency of vit D limits the performance of systems resulting in, increas…","key_points":[],"chapters":[],"topics":[],"duration_seconds":3256,"processing_state":"not_requested","actions":[{"name":"request_transcript","method":"POST","url":"https://stenobird.com/v1/public/podcasts/dr-john-campbell-7851784/episodes/vitamin-d-levels-advised/transcription-requests","description":"Idempotently request low-priority transcript generation for this episode."},{"name":"read_markdown","method":"GET","url":"https://stenobird.com/podcast/dr-john-campbell-7851784/vitamin-d-levels-advised.md","description":"Read the agent-friendly Markdown representation of this episode resource."}]}}