A common dry cleaning chemical called tetrachloroethylene, or PCE, has been linked to a threefold higher risk of significant liver fibrosis. 7% of Americans already have measurable levels of this chemical in their blood. And PCE doesn't stop at the liver. It also damages your kidneys directly by attacking the proximal tubules, the part of the kidney responsible for reabsorbing nutrients and fluids.

In this episode, Dr. Sean Hashmi breaks down the 2025 Liver International study that analyzed over 1,600 US adults, explains the two separate pathways through which PCE damages your liver and kidneys, and walks through a five-step protection protocol you can start this week. Topics covered include how to find PCE-free dry cleaning, why you should air out dry cleaned clothes before wearing them, which household products to check, when to consider water testing, and what lab work to ask your doctor about if you have occupational exposure.

Dr. Sean Hashmi is a board-certified nephrologist and obesity medicine specialist dedicated to evidence-based health education. This episode is part of the Hidden Environmental Kidney Threats series on The SELF Principle Podcast.

For more, visit selfprinciple.org or subscribe on YouTube at youtube.com/@SeanHashmiMD

Should you quit coffee? In this final episode of the Coffee Science Series, Dr. Sean Hashmi breaks down who should be careful with coffee and who can keep drinking it without worry.

Your genes play a bigger role than you think. A liver enzyme called CYP1A2 determines whether you're a fast or slow caffeine metabolizer, and that distinction changes everything about how coffee affects your heart, blood pressure, and sleep.

This episode covers caffeine metabolism and genetics, coffee during pregnancy and breastfeeding, the connection between caffeine, anxiety, and insomnia, medical interactions including transplant medications and blood pressure, a hidden nutrient interaction that reduces iron absorption by nearly 40 percent, bone health considerations, how to taper off caffeine safely, and the evidence-based middle ground for healthy adults.

For most people, two to four cups a day is associated with lower risk of type 2 diabetes, cardiovascular disease, kidney disease, and cognitive decline. But if coffee steals your sleep, spikes your anxiety, or raises your blood pressure, cutting back makes sense.

Dr. Sean Hashmi is a board-certified nephrologist and obesity medicine specialist. New episodes every Tuesday and Thursday.

Subscribe to the newsletter: selfprinciple.org/newsletterYouTube: youtube.com/@SeanHashmiMD

This episode is for educational purposes only and is not medical advice. Always consult your healthcare provider before making changes to your health routine.

Coffee is one of the healthiest beverages on the planet. But what you add to it can quietly undo every benefit.

In this episode, Dr. Sean Hashmi breaks down the real science behind decaf safety, explains why popular creamers contain hidden phosphate additives that accelerate kidney damage, and separates long-standing coffee myths from medical facts. You'll learn which additives to watch for on labels, why a flavored latte can deliver 30-50 grams of sugar, and how to keep your coffee working for your health instead of against it.

Topics covered: decaf processing methods, coffee and digestion, phosphate additives in creamers and plant-based milks, the bone health myth, hydration, and practical swaps to protect your kidneys.

Dr. Sean Hashmi is a board-certified nephrologist and obesity medicine specialist. New episodes every Tuesday and Thursday.

selfprinciple.org/newsletter

The old CKD playbook -- bland diet, blood pressure pill, hope for the best -- is dead. In this live AMA, Dr. Sean Hashmi breaks down three major shifts happening right now in kidney and metabolic medicine heading into 2026.

The Kidney Shift: The FDA just approved Ozempic for kidney protection in type 2 diabetes (the FLOW trial), plus new precision immunotherapy for IgA nephropathy and early data on kidney tissue regeneration.

The Metabolic Shift: New evidence on intermittent fasting, meal timing, GLP-1 effects on the brain and muscle, and why resistance training is non-negotiable if you're on these drugs.

The Longevity Shift: How SGLT2 inhibitors may double as longevity drugs, the science of biological aging vs. chronological age, and what senolytic research means for kidney patients.

Plus a full live Q&A covering potassium myths, plant-based diets for CKD, alcohol and kidney health, oral vs. injectable GLP-1s, protein powders, green smoothies, and more.

Your action plan: Ask your doctor about GLP-1s and SGLT2 inhibitors for kidney protection. Count 30 plant types this week. Keep your eating window under 12 hours. Lift heavy things.

Dr. Sean Hashmi is a board-certified nephrologist and obesity medicine specialist. New evidence-based videos every week.

Subscribe: youtube.com/@SeanHashmiMDNewsletter: selfprinciple.org/newsletterInstagram: @seanhashmimd

Medical Disclaimer: This episode is for educational purposes only and is not medical advice, diagnosis, or treatment. Always consult your healthcare provider before making changes to your health routine. The views expressed are Dr. Hashmi's personal professional opinions and do not represent any employer or affiliated organization.

#KidneyHealth #GLP1 #ChronicKidneyDisease #EvidenceBasedMedicine #SeanHashmiMD

Is your nightly melatonin safe? A groundbreaking study of 130,000 people presented at the 2025 American Heart Association Scientific Sessions found that long-term melatonin use was associated with nearly double the risk of heart failure. But before you panic, there's critical context you need to understand.

In this episode, Dr. Sean Hashmi breaks down what this study actually found, provides a clear 6-step action plan for safe melatonin use, and explains whether this risk applies to you based on how you're using it.

KEY TOPICS COVERED:

• The alarming findings from the 2025 heart failure study
• Why 90% higher risk doesn't tell the whole story
• The shocking truth about melatonin supplement quality (0-667% dosing variability)
• 6 evidence-based steps for safe melatonin use
• Optimal timing: why 3 hours before bed works best
• Does melatonin even work? What the data shows
• When to use melatonin vs. when to avoid it
• Study limitations and what they mean for you

THIS EPISODE IS FOR YOU IF:

• You take melatonin regularly or nightly
• You've been using melatonin for more than a year
• You have heart disease, diabetes, or kidney disease
• You want to understand the real risks and benefits
• You're looking for evidence-based sleep solutions

RESEARCH DISCUSSED:

• American Heart Association Scientific Sessions 2025 - Long-term melatonin cardiovascular outcomes study
• FDA analysis on melatonin supplement dosing variability
• 2024 meta-analysis on optimal melatonin timing
• Clinical trials on melatonin efficacy for sleep

Dr. Hashmi provides the full scientific context behind the headlines, helping you make informed decisions about your sleep health.

ABOUT DR. SEAN HASHMI:

Board-certified Nephrologist and Obesity Medicine Specialist (MD, MS, FASN) dedicated to translating complex medical research into clear, actionable strategies. Founder of the SELF Principle framework (Sleep, Exercise, Love, Food) and SELFPrinciple.org, a 501(c)(3) nonprofit providing free evidence-based health education.

CONNECT:

Website: selfprinciple.orgNewsletter: selfprinciple.org/newsletterInstagram: @seanhashmimdYouTube: @SeanHashmiMD

MEDICAL DISCLAIMER:

This podcast is for educational purposes only and is not medical advice, diagnosis, or treatment. Always consult your healthcare provider before making changes to your health routine. The views expressed are Dr. Hashmi's personal professional opinions and do not represent any employer or affiliated organization.

Practice kindness and gratitude.

Coffee doesn't just wake you up. It literally changes how your brain works.

In this episode, I break down the latest research on coffee and brain health. A meta-analysis of observational studies found that people who drank 2-4 cups of coffee daily had about a 20-25% lower risk of depression. And the data on Parkinson's disease is even stronger -- regular coffee drinkers showed 25-30% lower risk.

But dose and timing matter more than most people realize.

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IN THIS EPISODE:

How caffeine changes your brain within 20-30 minutes

Why coffee drinkers have lower depression risk -- and the mechanisms behind it

The connection between coffee and dementia risk (15-20% lower with moderate intake)

The Parkinson's data most people miss (25-30% risk reduction)

Important caveats: anxiety, sleep disruption, and dose

A practical brain-health coffee protocol you can start today

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EPISODE SEGMENTS:

[00:00] Introduction

[01:00] Coffee, Focus & Mood

[04:30] Coffee & Brain Disease

[07:30] Your Brain-Health Coffee Protocol

[10:00] Practical Takeaways

[11:00] Summary

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KEY INSIGHT:

Caffeine blocks adenosine receptors, increases dopamine and norepinephrine, reduces oxidative stress, and improves blood flow to the brain through better vascular health. But if coffee triggers anxiety or disrupts your sleep, the brain cost outweighs the benefit. Decaf retains most of the polyphenols and shows similar long-term associations in observational studies.

The sweet spot: 1-3 cups per day, morning only, stop caffeine at least 8 hours before bed.

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FOLLOW THE SELF PRINCIPLE PODCAST:

https://open.spotify.com/show/6HX1nq6RFoqcwzwh4L9cIM?si=9e06a1b50a1247ff

Full video with visual aids:

youtube.com/@SeanHashmiMD

Subscribe to the newsletter:

selfprinciple.org/newsletter

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CONNECT:

Instagram: @seanhashmimd

Website: selfprinciple.org

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REFERENCES:

Grosso G, et al. Coffee, caffeine, and health outcomes: an umbrella review. Annu Rev Nutr. 2017;37:131-156.

Lucas M, et al. Coffee, caffeine, and risk of depression among women. Arch Intern Med. 2011;171(17):1571-1578.

Qi H, Li S. Dose-response meta-analysis on coffee, tea, and caffeine consumption with risk of Parkinson's disease. Geriatr Gerontol Int. 2014;14(2):430-439.

Santos C, et al. Caffeine intake and dementia: systematic review and dose-response meta-analysis. J Alzheimers Dis. 2010;20(S1):S187-204.

Ascherio A, et al. Prospective study of caffeine consumption and risk of Parkinson's disease in men and women. Ann Neurol. 2001;50(1):56-63.

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MEDICAL DISCLAIMER:

This episode is for educational purposes only and is not medical advice, diagnosis, or treatment. Always consult your healthcare provider before making changes to your health routine. Views expressed are Dr. Hashmi's alone and do not represent any employer or institution. Individual results may vary. Listening does not establish a doctor-patient relationship.

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Keywords: Coffee, Brain Health, Depression, Parkinson's Disease, Dementia, Caffeine, Mental Health, Evidence-Based Medicine, Nephrology, Obesity Medicine

Stubborn belly fat won't budge despite diet and exercise? Your kidneys may be the hidden culprit.

Your kidneys clear over 50% of circulating insulin. When visceral fat compresses them, insulin stays elevated and your body gets locked in fat storage mode. This episode breaks down the kidney-belly fat connection most doctors miss — and exactly how to break the cycle.

In this episode:

• The role of perirenal fat in kidney compression

• Why your kidneys control insulin clearance (and fat burning)

• How the RAAS system triggers fluid retention and bloating

• The vicious cycle keeping you stuck in fat storage mode

• The SELF Principle approach: Sleep, Exercise, Love, Food

• A 14-day sodium reset to release kidney bloat

• 
  

References:1. Hall JE, et al. Obesity-induced hypertension: role of sympathetic nervous system, leptin, and melanocortins. Circ Res. 2021.2. Hall JE, et al. Obesity, kidney dysfunction and hypertension: mechanistic links. Nat Rev Nephrol. 2019.3. Gholami P, et al. Insulin resistance and insulin handling in chronic kidney disease. Front Endocrinol. 2024.4. Covassin N, et al. Effects of experimental sleep restriction on visceral obesity. J Am Coll Cardiol. 2022.5. Carlström M, et al. Nitric oxide signalling in kidney regulation and cardiometabolic health. Nat Rev Nephrol. 2021.

This is not medical advice. Always consult your healthcare provider before making changes.

Subscribe for weekly evidence-based health content.

Dr. Sean HashmiBoard-Certified Nephrologist and Obesity Medicine Specialistselfprinciple.org

Nearly 600 million people worldwide have diabetes. Could your morning coffee actually help protect you?

In this episode, I break down what decades of research reveal about coffee and metabolic health. A meta-analysis of over 1 million people found that each daily cup of coffee was linked to about 6% lower risk of developing type 2 diabetes. People drinking 2-4 cups per day showed 20-30% lower risk compared to non-drinkers.

But here's what most people miss: the benefits only apply if you drink it the right way.

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IN THIS EPISODE:

• How coffee affects insulin sensitivity, blood sugar, and fat metabolism
• The mechanisms behind coffee's protective effects, including AMPK activation and GLP-1
• Why your genetics determine how you respond to caffeine
• What that CGM spike after coffee actually means
• The one mistake that completely negates coffee's metabolic benefits
• A practical coffee protocol you can start using today

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YOUR ACTION PLAN:

• 2-3 cups per day is the sweet spot
• Never exceed 400mg caffeine total
• Stop caffeine 8-10 hours before bed
• Keep it mostly black — sugar bombs negate the benefits

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CONNECT:

Full video with timestamps: youtube.com/@SeanHashmiMD

Newsletter: selfprinciple.org/newsletter

Instagram: @seanhashmimd

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Medical Disclaimer: This episode is for educational purposes only and is not medical advice, diagnosis, or treatment. Always consult your healthcare provider before making changes to your health routine. The views expressed are Dr. Hashmi's personal professional opinions and do not represent any employer or affiliated organization.