Triquetra Discount: Use code Dave20 at Triquetrahealth.com/dave Multivitamin Mistakes, MTHFR Genetics, B Vitamins, Creatine & Prescription Drug Risks Host Dave Asprey sits down with Phil Cowley, a pharmacist, founder of Cache Valley Pharmacy, and creator of Phil's My Pharmacist, to explore multivitamins, prescription medications, supplement effectiveness, MTHFR genetics, methylated B vitamins, creatine, and the hidden problems within modern healthcare. After opening his pharmacy in Logan, Utah, in 2001, Phil spent two decades serving patients and dispensing millions of prescriptions. By 2021, declining insurance reimbursements threatened his business despite increasing prescription volume. He turned to social media to share practical, affordable health advice, eventually building an audience of more than six million followers. Now, he explains what his experience behind the pharmacy counter taught him about medication side effects, nutritional deficiencies, supplement quality, and why conventional healthcare often overlooks individual biology. The conversation examines common multivitamin mistakes, including the use of synthetic folic acid and pyridoxine (vitamin B6). Phil explains why certain nutrient forms may be less suitable for some individuals, how excessive B6 intake can cause peripheral neuropathy, and why buying more supplements doesn't necessarily improve health. They explore MTHFR genetic variants, methylation, and folate metabolism, including potential implications for cognitive function, inflammation, blood pressure, fertility, and neurological development. Phil also reveals why creatine is his favorite supplement, discussing its potential benefits for brain health and muscle performance. He and Dave examine creatine dosing, hydration, electrolytes, absorption, and why creatine supplementation can influence kidney-related blood test results. The discussion turns to Big Pharma, prescription drug pricing, and pharmacy benefit managers (PBMs). Phil shares how insurance reimbursement practices threatened his independent pharmacy despite increasing prescription volume. They also explore compounding pharmacies, customized hormone formulations, injectable vitamins, GLP-1 medications, and the challenges of providing personalized treatment within the conventional healthcare system. Finally, Dave and Phil examine personalized medicine, genetic testing, medication interactions, and nutritional deficiencies, including the relationship between statins and CoQ10. They discuss why individual biology should guide supplement choices and how addressing underlying metabolic processes may offer a more comprehensive approach to long-term health. This episode is essential listening for anyone interested in multivitamins, methylated B vitamins, MTHFR genetics, creatine, prescription drugs, supplement effectiveness, personalized nutrition, metabolic health, and longevity. You'll Learn: Why common multivitamins contain different forms of B vitamins, and how folic acid, folinic acid, L-methylfolate, and P5P differ How MTHFR genetic variants influence folate metabolism and why individual responses to supplements can vary What Phil recommends considering when using creatine for brain health, muscle performance, hydration, and kidney-related blood testing How pharmacy benefit managers, insurance reimbursement, and drug pricing affect independent pharmacies and patient care Why compounding pharmacies create customized medications, including hormone formulations, injectable vitamins, and certain GLP-1 treatments How personalized supplementation, nutrient testing, medication interactions, and genetics may help inform more individualized healthcare decisions Dave Asprey is a four-time New York Times bestselling author, founder of Bulletproof Coffee, and the father of biohacking. With over 1,000 interviews and 1 million monthly listeners, The Human Upgrade brings you the knowledge to take control of your biology, extend your longevity, and optimize every system in your body and mind. Each episode delivers cutting-edge insights in health, performance, neuroscience, supplements, nutrition, biohacking, emotional intelligence, and conscious living. New episodes are released every Tuesday, Thursday, Friday, and Sunday (BONUS). Dave asks the questions no one else will and gives you real tools to become stronger, smarter, and more resilient. Keywords: Phil Cowley, Phil's My Pharmacist, Dave Asprey, multivitamins, supplement mistakes, synthetic vitamins, methylated B vitamins, folic acid, methylfolate, MTHFR, methylation, vitamin B6, P5P, vitamin B12, folate metabolism, creatine, creatine dosage, brain health, kidney function, prescription drugs, drug interactions, pharmacy benefit managers, PBMs, Big Pharma, compounding pharmacy, GLP-1 medications, statins, CoQ10, personalized supplements, pharmacogenetics, longevity Resources: • Triquetra | Use code Dave20 at Triquetrahealth.com/dave for a discount • Get My 2026 Clean Nicotine Roadmap | Enroll for free at https://daveasprey.com/2026-clean-nicotine-roadmap/ • Dave Asprey's Latest News | Go to https://daveasprey.com/ to join Inside Track today. • Danger Coffee: https://dangercoffee.com/discount/davetube • My Daily Supplements: SuppGrade Labs (15% Off) • Favorite Blue Light Blocking Glasses: TrueDark (15% Off) Thank you to our sponsors! - Butcher Box | Go to ButcherBox.com/HUMANUPGRADE to get $20 off your first box, plus your choice of free ground beef for life, or free chicken thigh - ZenBud | Dave’s Nervous System Biohack. 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