#175 - Seed Oils

October 23rd, 2025 | Issue #175

Seed Oils: Hype, Hazard, or Just Misunderstood?

Are they the devil that health influencers make them out to be?

TL;DR: Human evidence doesn’t support the claim that seed oils drive chronic inflammation or sunburns. Prioritize diet quality, use fresh oils and never oxidized or rancid oils, suited to the cooking method, and keep sunscreen—not internet punditry—between you and UV.

TWO BIG THINGS THIS WEEK🧪 EFSA’s hexane review hits final data deadline this week — EFSA’s call for data on technical hexane (the solvent widely used to extract seed oils) closes Oct 23, 2025, a step toward a full re‑evaluation of solvent safety and residue limits. European Food Safety AuthorityWhy it matters: If exposure assessments and residue analytics shift, EU processing specs (currently allowing ~1 mg/kg residual solvent in oils) could tighten, nudging more producers toward mechanical/expeller methods—or better auditing—without changing front‑of‑pack labels. Good news in my opinion. EUFIC

🧬 Longevity Biotech 2025 kicks off in Boston (Oct 22–23) — This week’s agenda zeroes in on biomarkers, senolytics, and regulatory roadmaps, gathering biotech, pharma, and policy leaders under one roof. Anti-Aging Therapeutics ForumWhy it matters: With capital selectively returning to biotech and translational aging trials expanding, conference readouts often foreshadow collaborations and pilot studies that reach clinics 6–18 months later. Stay tuned for some good stuff coming out of this (fingers crossed) Financial Times

Are Seed Oils Uniquely Harmful or Just Easy Villains?

I’ll level with you: seed oils have become the new internet cholesterol—blamed for everything from brain fog to sunburns. But “industrial” doesn’t automatically mean “unsafe,” and “natural” isn’t a synonym for “better.” Our job is to ditch the rhetoric and follow the human data.

What actually happens when you eat seed oils?

Most “seed oils” (soybean, canola, sunflower, safflower, grapeseed) are rich in linoleic acid (LA, omega‑6). In humans, higher circulating LA is reliably associated with lower inflammatory biomarkers and better cardiometabolic risk—the opposite of the “LA = inflammation” meme. A 2025 biomarker study linked higher red‑blood‑cell omega‑6 (especially LA) with lower inflammation across multiple pathways; earlier randomized trials show that raising LA does not raise CRP/IL‑6. And a large 2025 cohort found plant‑oil intake correlated with lower total, cancer, and CVD mortality, while butter tracked higher mortality. MDPI+2RSC Publishing

Do seed oils cause sunburns or “sun sensitivity”?

Dermatology guidance is clear: diet can support skin, but it can’t replace UV protection. The American Academy of Dermatology and NICE emphasize sun avoidance at peak UV, clothing, and broad‑spectrum SPF 30+—not swapping your frying oil—as the levers that move sunburn risk. Some carotenoid‑rich foods (tomato products, lutein) can modestly raise UV erythema thresholds over 8–12 weeks, but that’s adjunctive, not armor. The claim that cutting seed oils stops sunburns has no credible clinical backing. American Academy of Dermatology

What about “industrial processing,” hexane, and the bleaching/deodorizing step?

Refined oils are typically extracted, refined, bleached, and deodorized (RBD). Where solvent extraction is used, regulators set tiny residue limits and monitor exposure; EFSA’s process is literally under re‑evaluation now, with new data due this week. Home takeaway: normal cooking with fresh oils (not repeatedly overheated/reused or rancid/old) stays within safety norms. If you prefer expeller‑pressed or extra‑virgin oils for flavor or philosophy, great—but “industrial” ≠ toxic. I know this, and my personal philosophy is to go as unrefined as possible, but I don't freak out when I get my ristretto with oat milk in the mornings, knowing it’s got canola oil in the barista versions. Penn State Extension

So…should we avoid seed oils?

We’re not in the “dump your pantry” camp. The practical win is reducing ultra‑processed foods (which often carry seed oils alongside sugars, starches, salt), and using appropriate oils for the job: e.g., EVOO for dressings/low‑medium heat; high‑oleic versions or avocado oil for hotter sears; avoid reusing fry oil. If you like hummus without added seed oils, check labels or make a two‑minute tahini‑olive‑oil version at home. The longevity play is overall diet quality, not a single fatty acid. Bloomberg School of Public Health

MARKET INTEL (past 60 days)

EFSA hexane timeline hits the wire (deadline Oct 23). If EFSA’s re‑evaluation tightens residue/exposure assumptions, expect incremental shifts in EU extraction QA, not immediate label changes. So what: watch European suppliers message “expeller‑pressed” more loudly. European Food Safety Authority

Biotech funding thaw? Mirador raises $400M. One of 2025’s largest raises boosts sentiment for late‑stage assets amid a thin IPO market. So what: longevity adjacencies (inflammation/autoimmune) attract capital even as pure‑play aging therapeutics remain selective. Financial Times

Women’s longevity delivery scales: Midi Health adds $50M (Series C) and an AgeWell program. So what: platform care + AI triage continues to out‑execute in midlife health—an on‑ramp for preventative longevity. Business Insider

Senolytics review (Cardio‑aging) was published ~3 weeks ago. Fresh synthesis maps preclinical → translational routes for fibrosis and vascular stiffness. So what: biomarker‑driven endpoints will be decisive for Phase 2s. ScienceDirect

Cheers!Brent

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YOUR Weekly LONGEVITY PLAN — Oil Edition

✅ Step 1: Measure it (this week): Do a 10‑item label audit in your fridge/pantry. Count how many products contain added oils in the first three ingredients. Aim to reduce that count by ≥2 items this week by swapping in whole‑food alternatives (e.g., hummus with tahini + EVOO, plain oats + milk of choice). Track: a simple before/after tally.

✅ Step 2: Make heat your friend (accessible): Match oil to method and freshness. Use EVOO for dressings/sautés; high‑oleic oils, coconut oil or avocado oil for higher heat; never reuse frying oil; store oils in dark bottles away from sun and heat. These tweaks lower off‑flavor/oxidation risk without restricting whole food groups. Penn State Extension

✅ Step 3: Future‑proof your skin (forward‑looking): Ask your clinician about a sun‑safety plan tailored to your skin type (Fitzpatrick I–VI), including SPF use, reapplication cadence, and protective clothing. If you want a nutrition angle, consider a 12‑week carotenoid‑rich food habit (tomato paste, leafy greens) as an adjunct—not a substitute—to sunscreen.

Sources for this newsletter this week: Research compiled from 30+ longevity publications, biotech funding reports, clinical trial databases, and Google News.Medical disclaimer: Content is for educational purposes only and is not medical advice. Always consult a qualified healthcare professional before making changes to your health regimen.Affiliate disclosure: Spannr may receive compensation when you click partner links and make a purchase. As an Amazon Associate, we earn from qualifying purchases. Some products may be provided at no cost for evaluation; opinions are our own.HIPAA/PHI notice: Do not send personal medical information to this inbox. Spannr does not collect or store PHI via email.

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