#65: Can I Eat All the Salt That I Want?

You read everywhere that you “should” cut salt—especially if your blood pressure is up. But salt also makes food enjoyable. In this episode, I walk through the human evidence (not animal studies) and frame salt as a risk–benefit tradeoff: when does sodium meaningfully matter, for whom, and how can you test your sensitivity?Big questions we answerIf you have high blood pressure: does lowering salt always help?If your BP is normal but you have heart/kidney risk: does salt matter?If you’re basically healthy: how worried should you be?Key takeawaysSodium is essential (nerves, muscles, fluid balance)—the issue is dose and individual response.Most sodium comes from packaged/restaurant foods (not your salt shaker).Salt restriction lowers BP, but the average effect is modest compared with typical BP meds (context matters).Salt sensitivity varies: roughly ~30% of healthy people and ~40–50% of people with hypertension may be “salt-sensitive” (with higher rates in older adults, women, and some ancestry groups).If you’re salt-sensitive—especially with hypertension—being mindful of sodium is likely worth it. If you’re not, the “must be low-salt for everyone” story is less clear.Practical: Do an N-of-1 salt sensitivity testMeasure home BP daily (or a few times/day) for a weekGo lower-sodium for 1–2+ weeks (at least within guidelines, possibly lower)Track BP changeAdd salt back and watch what happensOptional: repeat the low-salt phase for confirmation If BP shifts meaningfully (often ~3–5 mmHg+), you may be salt-sensitive.Food reality check (why sodium adds up fast)~10% of a 2,300 mg/day sodium “budget”: 2 slices bread, 1 Tbsp ketchup, or a pinch of salt~1/3: 1 cup canned soup, 1 slice pizza, or a Big Mac~1/2: frozen lasagna, a few deli slices, or a 6” cold-cut sub Cooking mostly from whole foods makes staying lower-sodium much easier.Studies & resources mentioned (links embedded)CDC hypertension awareness/treatment/control stats: https://www.cdc.gov/nchs/products/databriefs/db511.htmHypertension outcomes review (risk of events/death): https://pmc.ncbi.nlm.nih.gov/articles/PMC8292050/Population sodium/BP overview (JACC): https://www.jacc.org/doi/10.1016/j.jacc.2019.11.055DASH-Sodium trial (NEJM): https://www.nejm.org/doi/full/10.1056/NEJM200101043440101Sodium restriction meta-analysis (BP/outcomes): https://pmc.ncbi.nlm.nih.gov/articles/PMC12624901/Salt sensitivity overview (AHA/Hypertension): https://www.ahajournals.org/doi/10.1161/HYPERTENSIONAHA.123.17959Heart failure trials/meta (salt restriction): https://www.ahajournals.org/doi/10.1161/CIRCHEARTFAILURE.122.009879Salt substitute trial (NEJM): https://www.nejm.org/doi/full/10.1056/NEJMoa2105675Call to action Are you going to run your own N-of-1 salt test? If you do, I’d love to hear what you learn.Reminder: I’m an educational resource, not your physician—use this to guide a conversation with your clinician.Send us Fan MailSupport the show📥 Tap to join my free newsletter & get the 1-page episode checklists: drbobbylivelongandwell.com