54 | Should Everyone Be Taking Vitamin D?

Send us Fan MailIs Vitamin D really as essential as everyone says or are we just overhyping another supplement?After getting tons of questions following our popular creatine episode, we realized people are equally confused about Vitamin D. So in this one, we’re breaking it all down: what Vitamin D actually is, where it comes from, who’s most at risk for deficiency, and how it’s connected to things like bone health, mood, immune function, and even PCOS.By the end of this episode, you’ll know if Vitamin D matters for you, what dose is right, and why sunlight might not be enough based on your lifestyle.🎗️Timestamps:00:30 Hosts Catching Up: Yawning & Sleep Deprivation02:27 Revisiting the Creatine Episode05:00 What to Expect in This Episode (Overview of Key Points)05:53 What Is Vitamin D & the Difference Between D2 and D307:03 How Vitamin D Impacts Bone Health09:45 Pros, Cons & Where to Actually Get Vitamin D11:00 Common Misconceptions About Sunlight & Vitamin D12:37 Dietary Sources & Fortified Foods with Vitamin D17:28 How Obesity, Breastfeeding & Digestive Disorders Affect Vitamin D19:57 Navigating Conflicting Research on Vitamin D24:58 Immunity, Respiratory Illness & the COVID Controversy30:50 Mental Health, Seasonal Affective Disorder & Vitamin D36:50 New 2025 Research: Vitamin D’s Role in Managing PCOS39:46 Final Takeaways📒 Resources:🎧 50 | Everything We’ve Learned About Creatine (So You Don’t Have To)🎧 40 | Scandals in the Supplement Space📱 @pcosnutrition on Instagram📄 Center for Health Research — Vitamin D Potency Varies Widely in Dietary Supplements📄 National Institute for Health and Care Excellence — Vitamin D: supplement use in specific population groups📄 Scientific Advisory Committee on Nutrition — Vitamin D and Health Report📄 Martineau et al., BMJ 2017 — Vitamin D supplementation to prevent acute respiratory tract infections📄 Callegari et al., JAMA Psychiatry 2024 — Vitamin D supplementation and depression meta-analysis 📄 Parliamentary Office of Science and Technology 2021 — Vitamin D and COVID-19 📄 National Library of Medicine — Effects of Vitamin D3 Treatment on PCOS💛 STAY CONNECTED Don’t forget to subscribe to our podcast so you never miss an episode.🟡 Questions & SuggestionsWe love hearing from you, if you have a question, a topic idea, or feedback on an episode, just click here🟡 How to: FitnessInstagram: @howtofitnesspod🟡 Michael Ulloa Website: michaelulloa.com Instagram: @michaelulloapt🟡 Kate Lyman Website: katelymannutrition.com Instagram:  @klnutritionThank you for listening to the How to: Fitness Podcast with Michael Ulloa and Kate Lyman!