Knife Down

Lily Johnston, MD MPH
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 "Knife Down" is what a surgeon says in the OR when she puts her scalpel down so no one gets hurt — and it’s the mission here: put the knife down, long before anyone needs to use it. Knife Down is a podcast about how to actually invest in your health so you can live longer, stronger, and with less time in doctors’ offices. The core focus is the world’s leading cause of death—cardiovascular disease—and what to do about it before it shows up as a catastrophe. Hosted by a vascular surgeon on a mission to put herself out of business, the show translates cutting-edge science on prevention, metabolic health, and longevity into real-world strategies you can use in clinic or at your kitchen table. Expect evidence, nuance, and zero wellness hype—plus the occasional dark joke about the state of modern medicine.

  1. 6 days ago

    What Really Causes Heart Disease: LDL or Inflammation?

    In this video, Dr. Lily Johnston addresses viewer questions about lipid panels, heart disease risk, and diagnostic testing. Key topics include: Coronary Calcium Scans vs. CCTA/CIMT: Why calcium scores may not be sufficient for younger patients and the benefits of soft plaque detection. Exercise and Lipids: Clarifying that while exercise is vital for longevity, its impact on LDL-C numbers is often minimal. MRI vs. CT for Plaque: Why MRI is generally not the preferred tool for assessing arterial plaque buildup. Inflammation and Cardiovascular Risk: A discussion on the "Zeus" trial and the ongoing relevance of inflammation in heart disease. LDL-C to ApoB Ratios: Explaining discordance and why both particle count and cargo matter for risk assessment. ApoB Particle Size: Debunking myths about "large fluffy" particles and emphasizing the importance of total particle burden. N=1 Experiment: Dr. Lily reveals she will be testing both Dihydroberberine and Ezetimibe to observe their effects on her own lipid levels, starting with Dihydroberberine. Chpaters 00:00 - Introduction and reaction to lipid panel comments 00:33 - Coronary calcium scans: Scores, age, and soft plaque risk 01:58 - CIMT and CCTA: Better alternatives for soft plaque detection 02:28 - Does exercise move the needle on your lipid numbers? 03:51 - Is MRI better than CIMT for assessing plaque? 05:14 - Why a community poll for a personal medical experiment? 06:05 - The Zeus Trial: Inflammation vs. Lipids debate 08:46 - Understanding the LDL-C to ApoB ratio and discordance 12:24 - Small vs. Large LDL particles: Does size really matter? 15:05 - Dr. Aloe and the "sole predictor" stance on LDL-C 18:14 - The Verdict: Starting the Dihydroberberine experiment Sign up for more information on my own practice here: https://corsighthealth.com/ High Quality 3rd-party tested supplements at Fullscript (10% discount): https://us.fullscript.com/welcome/ljohnstonmd/store-start Order your own labs here: https://www.ultalabtests.com/partners/lilyjohnstonmd OR www.ownyourlabs.com Other tools for optimal health (note these are affiliate links): Home BP Cuff: https://amzn.to/49Cq7rh Sonicare Toothbrush: https://amzn.to/3KllfMS WaterPik: https://amzn.to/4894Xi8 Apple Watch with sleep & HR monitoring: https://amzn.to/3XaUn5d Oura Ring with sleep, cycle, and recovery monitoring: https://amzn.to/4riyhLS Intake Breathing Nasal Support: https://amzn.to/48dfQQ1 Personal Blender: https://amzn.to/4pyNGGl True Nutrition Protein: https://oken.do/q2xzqeqw Glass Meal Prep Containers: https://amzn.to/4ocEPJ2 Sleep Mask: https://amzn.to/48fSJV5 Air Purifier: https://amzn.to/4puzTQZ ___________________________ 🧬 About Dr. Lily Johnston    Dr. Johnston is a double board-certified vascular and general surgeon in San Diego, specializing in metabolic and cardiovascular prevention. She’s the founder of CorSight Health and a passionate advocate for reimagining how medicine approaches chronic disease.    #MetabolicHealth #CardiovascularPrevention #HeartHealth #Longevity #InsulinResistance #DrLilyJohnston #DrLily #WomenInMedicine #Surgeon #VascularSurgeon #PreventiveMedicine #PADPrevention #HeartAttackRisks #HealthPortfolio #California #SanDiego #Arizona #Virginia #Minnesota

  2. 26 Aug

    This Changes How I Think About Creatine

    Can a simple 5g scoop of creatine do more than just build muscle? In today’s video, I’m reacting to Thomas DeLauer’s insights on how creatine might “spare” your body’s methylation cycle—and then diving deep into the actual clinical data to see if it really lowers homocysteine. As a vascular surgeon, I’m always looking for ways to reduce cardiovascular risk. We know that high homocysteine is a major red flag for heart attack and stroke, but the evidence for using creatine to fix it is surprisingly nuanced. In this video, we cover: The "Metabolic Cost" of making your own creatine. How methylation impacts your DNA repair and neurotransmitters. My breakdown of the 2015 Journal of Nutrition study on creatine and homocysteine. Why the "MTHFR mutation" changes the whole conversation. My current stance on methylated B vitamins vs. creatine. Chapters:  0:00 - Reaction to Thomas DeLauer’s Creatine Theory  1:15 - How Creatine Synthesis Drains Your Body  3:02 - The Glycine Connection: Joints, Skin, and Detox  5:42 - Implications for MTHFR and High Homocysteine  8:18 - Does Creatine Lower Homocysteine? (Open Evidence Search)  12:28 - Deep Dive: Bangladesh Randomized Controlled Trial  18:10 - The Verdict: Folic Acid vs. Creatine  21:30 - My Recommendations for Patients Let me know your thoughts on creatine in the comments! Are you taking it for more than just the gym? Do these suggestions align with the direction you want to take for this video? Sign up for more information on my own practice here: https://corsighthealth.com/ High Quality 3rd-party tested supplements at Fullscript (10% discount): https://us.fullscript.com/welcome/ljohnstonmd/store-start Order your own labs here: https://www.ultalabtests.com/partners/lilyjohnstonmd OR www.ownyourlabs.com Other tools for optimal health (note these are affiliate links): Home BP Cuff: https://amzn.to/49Cq7rh Sonicare Toothbrush: https://amzn.to/3KllfMS WaterPik: https://amzn.to/4894Xi8 Apple Watch with sleep & HR monitoring: https://amzn.to/3XaUn5d Oura Ring with sleep, cycle, and recovery monitoring: https://amzn.to/4riyhLS Intake Breathing Nasal Support: https://amzn.to/48dfQQ1 Personal Blender: https://amzn.to/4pyNGGl True Nutrition Protein: https://oken.do/q2xzqeqw Glass Meal Prep Containers: https://amzn.to/4ocEPJ2 Sleep Mask: https://amzn.to/48fSJV5 Air Purifier: https://amzn.to/4puzTQZ ___________________________ 🧬 About Dr. Lily Johnston    Dr. Johnston is a double board-certified vascular and general surgeon in San Diego, specializing in metabolic and cardiovascular prevention. She’s the founder of CorSight Health and a passionate advocate for reimagining how medicine approaches chronic disease.    #MetabolicHealth #CardiovascularPrevention #HeartHealth #Longevity #InsulinResistance #DrLilyJohnston #DrLily #WomenInMedicine #Surgeon #VascularSurgeon #PreventiveMedicine #PADPrevention #HeartAttackRisks #HealthPortfolio #California #SanDiego #Arizona #Virginia #Minnesota

  3. 24 Aug

    High LDL. Normal ApoB. Now What??

    What do you do when your "bad cholesterol" (LDL) flags high, but your other metabolic markers look great? In this video, I’m sharing my personal lab results to explain why standard lipid panels only tell part of the story. We’ll dive deep into the world of lipoproteins, exploring why ApoB is a more precise measure of cardiovascular risk than LDL-C alone. Using a highway analogy, I’ll show you why the number of "cars on the road" (particles) matters far more for plaque formation than the "cargo" (cholesterol) they carry. In this video, we cover: Standard vs. Advanced Testing: Why I look at the Triglyceride/HDL ratio and ApoB. The Concept of Discordance: What it means when your LDL and ApoB numbers don't track together. Metabolic Health: How inflammation and insulin resistance act like "potholes" on your arterial highway. The 2026 Guidelines: How to put your numbers into the context of your overall risk. Beyond the Lab: Why I’m prioritizing imaging (CIMT) over blood work to decide my next steps. 🔬 JOIN THE EXPERIMENT! I’m going to run a 90-day experiment to see how different interventions affect my numbers, and I want YOU to choose the path. Vote in the comments: Dihydroberberine: A supplement known for lipid and glucose support. Ezetimibe (Zetia) Monotherapy: A medication that targets cholesterol absorption. Drop your questions about lipids below—I’ll be answering as many as I can in an upcoming Q&A! #Cholesterol #ApoB #HeartHealth #MetabolicHealth #LDL #VascularHealth #PreventativeMedicine Chapters: 00:00 – Introduction: My cholesterol results are in  00:24 – The standard lipid panel: Total cholesterol vs. Triglycerides  01:22 – Why the Triglyceride to HDL ratio matters for metabolic health  02:11 – The myth of raising HDL: Trials and outcomes  03:08 – Understanding LDL calculations and limitations  04:18 – The deep dive into ApoB: Why lipoproteins matter more than cholesterol  06:02 – The highway analogy: Particles vs. cargo  07:49 – Two types of ApoB (100 vs. 48) and their roles  10:20 – Road conditions: The role of the endothelium and inflammation  11:32 – 2026 ACC/AHA lipid guidelines and risk assessment  13:41 – Understanding discordance: Why my LDL is high but ApoB is normal  16:56 – Advanced testing: NMR particle count breakdown  21:09 – LPIR: Assessing insulin resistance through lipids  22:38 – Why numbers aren't enough: The importance of imaging (CIMT)  24:38 – The Experiment: Help me choose between Berberine and Ezetimibe Sign up for more information on my own practice here: https://corsighthealth.com/ High Quality 3rd-party tested supplements at Fullscript (10% discount): https://us.fullscript.com/welcome/ljohnstonmd/store-start Order your own labs here: https://www.ultalabtests.com/partners/lilyjohnstonmd OR www.ownyourlabs.com Other tools for optimal health (note these are affiliate links): Home BP Cuff: https://amzn.to/49Cq7rh Sonicare Toothbrush: https://amzn.to/3KllfMS WaterPik: https://amzn.to/4894Xi8 Apple Watch with sleep & HR monitoring: https://amzn.to/3XaUn5d Oura Ring with sleep, cycle, and recovery monitoring: https://amzn.to/4riyhLS Intake Breathing Nasal Support: https://amzn.to/48dfQQ1 Personal Blender: https://amzn.to/4pyNGGl True Nutrition Protein: https://oken.do/q2xzqeqw Glass Meal Prep Containers: https://amzn.to/4ocEPJ2 Sleep Mask: https://amzn.to/48fSJV5 Air Purifier: https://amzn.to/4puzTQZ ___________________________ 🧬 About Dr. Lily Johnston    Dr. Johnston is a double board-certified vascular and general surgeon in San Diego, specializing in metabolic and cardiovascular prevention. She practices at Scripps Clinic and is also the founder of CorSight Health, where she is a passionate advocate for reimagining how medicine approaches chronic disease.

  4. 22 Aug

    The 10 Blood Tests I Run to Catch Heart Disease DECADES Early

    After I walked through my own labs last week, you had sharp follow-ups — Vascepa versus a mixed omega-3, why my lab screenshots had no reference ranges, which lab company I actually use — so the first half is me answering them. Then I count down my real top 10 tests for catching cardiovascular disease early, from hemoglobin A1c at number 10 up to my number one, which isn't a blood test at all. Watch the countdown and let me know in the comments how many you've already had! ⏱️ CHAPTERS  0:00 The top 10 tests, and why I'm ranking them  0:19 Vascepa (icosapent ethyl): EPA vs. DHA, and why I skip it  1:59 "Where are the units?" Normal vs. optimal ranges  3:14 Methylated B complex for high homocysteine  4:14 Which lab company I actually use 5:07 hs-CRP's day-to-day swing, and the GlycA question 7:20 Top 10! Order your own labs here: https://www.ultalabtests.com/partners/lilyjohnstonmd OR www.ownyourlabs.com ⚕️ DISCLAIMER This channel is for education, not medical advice. I'm a board-certified vascular surgeon, but I'm not your surgeon, and nothing here replaces a conversation with your own physician. The "optimal" ranges I use are tighter than what a lab flags as normal, and they're the targets I set for myself and my patients — yours may be different. Don't start, stop, or change anything based on a single number without talking to the doctor who knows your whole picture. 💬 Found this useful? Subscribe, and leave your LpPLA2 and inflammation questions in the comments — those are getting their own deep dive soon. Until next time, take really good care. Sign up for more information on my own practice here: https://corsighthealth.com/ High Quality 3rd-party tested supplements at Fullscript (10% discount): https://us.fullscript.com/welcome/ljohnstonmd/store-start Other tools for optimal health (note these are affiliate links): Home BP Cuff: https://amzn.to/49Cq7rh Sonicare Toothbrush: https://amzn.to/3KllfMS WaterPik: https://amzn.to/4894Xi8 Apple Watch with sleep & HR monitoring: https://amzn.to/3XaUn5d Oura Ring with sleep, cycle, and recovery monitoring: https://amzn.to/4riyhLS Intake Breathing Nasal Support: https://amzn.to/48dfQQ1 Personal Blender: https://amzn.to/4pyNGGl True Nutrition Protein: https://oken.do/q2xzqeqw Glass Meal Prep Containers: https://amzn.to/4ocEPJ2 Sleep Mask: https://amzn.to/48fSJV5 Air Purifier: https://amzn.to/4puzTQZ ___________________________ 🧬 About Dr. Lily Johnston    Dr. Johnston is a double board-certified vascular and general surgeon in San Diego, specializing in metabolic and cardiovascular prevention. She’s the founder of CorSight Health and a passionate advocate for reimagining how medicine approaches chronic disease.    #MetabolicHealth #CardiovascularPrevention #HeartHealth #Longevity #InsulinResistance #DrLilyJohnston #DrLily #WomenInMedicine #Surgeon #VascularSurgeon #PreventiveMedicine #PADPrevention #HeartAttackRisks #HealthPortfolio #California #SanDiego #Arizona #Virginia #Minnesota

  5. 19 Aug

    I Checked My Own Labs: Here’s Exactly How I Read Them

    How to read your blood test results — from a vascular surgeon using her own bloodwork. I go line by line through the complete blood count (CBC), fasting glucose and insulin, kidney and liver panels, thyroid, inflammation (hs-CRP), ferritin, and a lipid panel that's getting its own video. This is exactly how I read labs for my metabolic patients, with all my own numbers on screen: the good, the bad, and a couple that genuinely disappointed me. Along the way: why my hs-CRP finally dropped under 1 after years of nagging me, the omega-3 result I'm not proud of, what fasting insulin and A1c say about insulin resistance, and how a "high" calculated LDL can sit right next to a normal ApoB. Pull up your own blood test results and read along. ⏱️ CHAPTERS 0:00 The good, the bad, and a little ugly 0:26 CBC: blood counts and what red-cell size hints at 3:28 Platelets, and my inflammation hunch 5:44 The differential, quickly 6:53 The fasting glucose that annoyed me (and the post-call excuse) 10:06 Kidney function, and the tests I skipped 13:41 Calcium, and the vitamin D catch 14:53 Uric acid: gout, fructose, and purines 16:07 Liver "dysfunction" tests: AST, ALT, bilirubin 17:43 My vitamin D, homocysteine, and MTHFR 21:22 Ferritin and my iron stores 21:56 My worst result: the omega-3 balance 24:58 Metabolic markers: A1c and fasting insulin 25:34 Thyroid, read on replacement 26:37 The hs-CRP win: from 3 down to 0.6 27:44 Lipid teaser: 209 total, ApoB 86, and the next video ▶️ WATCH NEXT 7 Life-Saving Tests Your Doctor Might Skip!: https://youtu.be/vPw38B9QzjM 5 MORE Tests That Reveal What's Really Happening Inside Your Body: https://youtu.be/vwORTxzeEMg Order your own labs here: https://www.ultalabtests.com/partners/lilyjohnstonmd OR www.ownyourlabs.com ⚕️ DISCLAIMER This channel is for education, not medical advice. I'm a board-certified vascular surgeon, but I'm not your surgeon, and nothing here replaces a conversation with your own physician. One lab value is a single snapshot in time; reference ranges, timing, and your own history all change what a number means. Don't start, stop, or change anything based on one result. Bring your labs to your own doctor. 💬 Found this useful? Subscribe, and tell me in the comments which panel you want me to break down next. We'll get to as many questions as we can. Until then, take really good care. Sign up for more information on my own practice here: https://corsighthealth.com/ High Quality 3rd-party tested supplements at Fullscript (10% discount): https://us.fullscript.com/welcome/ljohnstonmd/store-start Other tools for optimal health (note these are affiliate links): Home BP Cuff: https://amzn.to/49Cq7rh Sonicare Toothbrush: https://amzn.to/3KllfMS WaterPik: https://amzn.to/4894Xi8 Apple Watch with sleep & HR monitoring: https://amzn.to/3XaUn5d Oura Ring with sleep, cycle, and recovery monitoring: https://amzn.to/4riyhLS Intake Breathing Nasal Support: https://amzn.to/48dfQQ1 Personal Blender: https://amzn.to/4pyNGGl True Nutrition Protein: https://oken.do/q2xzqeqw Glass Meal Prep Containers: https://amzn.to/4ocEPJ2 Sleep Mask: https://amzn.to/48fSJV5 Air Purifier: https://amzn.to/4puzTQZ ___________________________ 🧬 About Dr. Lily Johnston    Dr. Johnston is a double board-certified vascular and general surgeon in San Diego, specializing in metabolic and cardiovascular prevention. She’s the founder of CorSight Health and a passionate advocate for reimagining how medicine approaches chronic disease.    #MetabolicHealth #CardiovascularPrevention #HeartHealth #Longevity #InsulinResistance #DrLilyJohnston #DrLily #WomenInMedicine #Surgeon #VascularSurgeon #PreventiveMedicine #PADPrevention #HeartAttackRisks #HealthPortfolio #California #SanDiego #Arizona #Virginia #Minnesota

  6. 17 Aug

    Carnivore Bloodwork: Best Case, Not the Whole Case

    Dr. Abs pulled bloodwork from 50 of his carnivore patients — cholesterol up, triglycerides down, A1C and CRP better across the board. It's a genuinely good data set. It's also the best-case scenario, not the average one. I'm reacting to walk through what those numbers actually mean, why cherry-picked wins don't tell you what happens to everyone on this diet, and what two Virta Health trials add to the picture: LDL-C did rise over two years, but it was driven by a shift toward larger, less atherogenic particles, and carotid imaging showed no progression of arterial disease. Original video: https://youtu.be/CygSkDzDOHE Studies referenced: Bhanpuri et al., 2018, Cardiovascular Diabetology — PMID 29712560 — https://pubmed.ncbi.nlm.nih.gov/29712560/ Athinarayanan et al., 2020, Cardiovascular Diabetology — PMID 33292205 — https://pubmed.ncbi.nlm.nih.gov/33292205/ Sign up for more information on my own practice here: https://corsighthealth.com/ High Quality 3rd-party tested supplements at Fullscript (10% discount): https://us.fullscript.com/welcome/ljohnstonmd/store-start Other tools for optimal health (note these are affiliate links): Home BP Cuff: https://amzn.to/49Cq7rh Sonicare Toothbrush: https://amzn.to/3KllfMS WaterPik: https://amzn.to/4894Xi8 Apple Watch with sleep & HR monitoring: https://amzn.to/3XaUn5d Oura Ring with sleep, cycle, and recovery monitoring: https://amzn.to/4riyhLS Intake Breathing Nasal Support: https://amzn.to/48dfQQ1 Personal Blender: https://amzn.to/4pyNGGl True Nutrition Protein: https://oken.do/q2xzqeqw Glass Meal Prep Containers: https://amzn.to/4ocEPJ2 Sleep Mask: https://amzn.to/48fSJV5 Air Purifier: https://amzn.to/4puzTQZ ___________________________ 🧬 About Dr. Lily Johnston    Dr. Johnston is a double board-certified vascular and general surgeon in San Diego, specializing in metabolic and cardiovascular prevention. She’s the founder of CorSight Health and a passionate advocate for reimagining how medicine approaches chronic disease.    #MetabolicHealth #CardiovascularPrevention #HeartHealth #Longevity #InsulinResistance #DrLilyJohnston #DrLily #WomenInMedicine #Surgeon #VascularSurgeon #PreventiveMedicine #PADPrevention #HeartAttackRisks #HealthPortfolio #California #SanDiego #Arizona #Virginia #Minnesota

  7. 15 Aug

    Cholesterol Balance & Keto Bias

    Chapters:  00:00 The Replication Crisis & Messy Science  02:11 Why the KETO-CTA Study Was Retracted  03:25 Mediterranean Keto vs. Standard Keto  06:14 Cholesterol Balance: Absorption vs. Production  10:50 The Million-Dollar Question: What Causes Plaque?  13:07 Small Studies & Statistical Manipulation  15:03 Addressing Bias, Personalities, and Grifters  16:56 My Position on ApoB and Personalized Care In this video, I dive into the "spicy" comments from my recent keto reaction video to address the complexities of heart health, the reality of the scientific replication crisis, and the nuances of personalized medicine. We discuss why a major keto study was retracted, how to think about cholesterol absorption vs. production, and why "testing, not guessing" is the only way to truly understand your own cardiovascular risk. Sign up for more information on my own practice here: https://corsighthealth.com/ High Quality 3rd-party tested supplements at Fullscript (10% discount): https://us.fullscript.com/welcome/ljohnstonmd/store-start Other tools for optimal health (note these are affiliate links): Home BP Cuff: https://amzn.to/49Cq7rh Sonicare Toothbrush: https://amzn.to/3KllfMS WaterPik: https://amzn.to/4894Xi8 Apple Watch with sleep & HR monitoring: https://amzn.to/3XaUn5d Oura Ring with sleep, cycle, and recovery monitoring: https://amzn.to/4riyhLS Intake Breathing Nasal Support: https://amzn.to/48dfQQ1 Personal Blender: https://amzn.to/4pyNGGl True Nutrition Protein: https://oken.do/q2xzqeqw Glass Meal Prep Containers: https://amzn.to/4ocEPJ2 Sleep Mask: https://amzn.to/48fSJV5 Air Purifier: https://amzn.to/4puzTQZ ___________________________ 🧬 About Dr. Lily Johnston    Dr. Johnston is a double board-certified vascular and general surgeon in San Diego, specializing in metabolic and cardiovascular prevention. She’s the founder of CorSight Health and a passionate advocate for reimagining how medicine approaches chronic disease.    #MetabolicHealth #CardiovascularPrevention #HeartHealth #Longevity #InsulinResistance #DrLilyJohnston #DrLily #WomenInMedicine #Surgeon #VascularSurgeon #PreventiveMedicine #PADPrevention #HeartAttackRisks #HealthPortfolio #California #SanDiego #Arizona #Virginia #Minnesota

  8. 23 Jul

    Surgeon Reacts to the KETO-CTA 'Scandal'

    The KETO-CTA trial got retracted this year, and most of the internet treated it like a takedown. The authors pulled their own paper because they found real errors in the analysis. That took integrity. I react to how other creators have covered this retraction, walk through what the errors actually were, and make the case that watching scientists correct themselves in public is what good science looks like. 📚 STUDY DISCUSSED Soto-Mota A, Norwitz NG, Manubolu VS, Kinninger A, Wood TR, Earls J, Feldman D, Budoff M. Longitudinal Data From the KETO-CTA Study: Plaque Predicts Plaque, ApoB Does Not. JACC Adv. 2025;4(7):101686. PMID: 40192608. https://pubmed.ncbi.nlm.nih.gov/40192608/ (Retracted Publication) Expression of Concern: "Plaque Begets Plaque. ApoB Does Not: Longitudinal Data from The KETO-CTA Trial" [JACC: Advances, Volume 4, Issue 7, July 2025, Article 101686]. JACC Adv. 2026;5(3):102607. PMID: 41906601. https://pubmed.ncbi.nlm.nih.gov/41906601/ ▶️ WATCH NEXT Is Ezetimibe the Secret to Preventing Dementia? Surgeon Reacts to @nicknorwitzMDPhD: https://youtu.be/Rzz2g9gRL_8 Is Lower LDL Actually Better? New Research Has an Answer: https://youtu.be/Q2lvd9ND7rA ⚕️ DISCLAIMER This channel is for education, not medical advice. I'm a board-certified vascular surgeon, but I'm not your surgeon, and nothing here replaces a conversation with your own physician.Sign up for more information on my own practice here: https://corsighthealth.com/ High Quality 3rd-party tested supplements at Fullscript (10% discount): https://us.fullscript.com/welcome/ljohnstonmd/store-start Other tools for optimal health (note these are affiliate links): Home BP Cuff: https://amzn.to/49Cq7rh Sonicare Toothbrush: https://amzn.to/3KllfMS WaterPik: https://amzn.to/4894Xi8 Intake Breathing Nasal Support: https://amzn.to/48dfQQ1 Personal Blender: https://amzn.to/4pyNGGl True Nutrition Protein: https://oken.do/q2xzqeqw Glass Meal Prep Containers: https://amzn.to/4ocEPJ2 Sleep Mask: https://amzn.to/48fSJV5 Air Purifier: https://amzn.to/4puzTQZ ___________________________ 🧬 About Dr. Lily Johnston    Dr. Johnston is a double board-certified vascular and general surgeon in San Diego, specializing in metabolic and cardiovascular prevention. She’s the founder of CorSight Health and a passionate advocate for reimagining how medicine approaches chronic disease.

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About

 "Knife Down" is what a surgeon says in the OR when she puts her scalpel down so no one gets hurt — and it’s the mission here: put the knife down, long before anyone needs to use it. Knife Down is a podcast about how to actually invest in your health so you can live longer, stronger, and with less time in doctors’ offices. The core focus is the world’s leading cause of death—cardiovascular disease—and what to do about it before it shows up as a catastrophe. Hosted by a vascular surgeon on a mission to put herself out of business, the show translates cutting-edge science on prevention, metabolic health, and longevity into real-world strategies you can use in clinic or at your kitchen table. Expect evidence, nuance, and zero wellness hype—plus the occasional dark joke about the state of modern medicine.

Information

  • Creator
    Lily Johnston, MD MPH
  • Years Active
    2026
  • Episodes
    56
  • Rating
    Clean
  • Copyright
    © 2026 Knife Down
  • Show Website
    Knife Down

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