Kosher Longevity
Safety Before Stacking

Taking a medication? Start here.

Educational only. Not medical advice. Not rabbinic advice. Use as a discussion guide with your physician and your rav.

Absolute Risk & NNT

What the trial actually showed — not the relative-risk headline. Translate the numbers into how many people had to be treated to help one.

Run Medication Reality Check →

Nutrient Depletion Flags

Statins, metformin, PPIs, diuretics and more deplete specific nutrients. See what your prescription may affect — and why it matters before you stack.

Check Drug-Nutrient Depletion →

Physician + Rabbi Discussion Sheet

One-page printable summary: trial evidence, nutrient depletions, dose/form used, kosher status, capsule shell, and questions for your prescribing clinician and your rav.

Generate the sheet →
Free Tools

Interactive tools — built on the same four rules

Click any card to open that tool. Only one tool is open at a time — keeps your scroll short.

Recommender

Kosher Stack Builder

Pick your goal and constraints (pareve only, Chalav Yisrael, fish-gelatin ok, capsule shell). Get a tier-ranked stack with kosher certification status.

Build my stack
Reality Check

Medication & Nutrient Depletion Check

Pick your medications. See which nutrients they may deplete — and which kosher-certified replacements have human evidence.

Run check
Testing

Biomarker Testing Roadmap

Starter panel for your physician plus the 8-test at-home library (OmegaQuant, TruDiagnostic, Everlywell, ZRT, Ulta) — kashrut-flagged.

Build roadmap
Score

Cardiovascular Longevity Score

Score your heart health across 8 evidence-based factors (diet, activity, sleep, BMI, BP, cholesterol, glucose, nicotine).

Take the score
Discussion

Physician & Rabbi Discussion Sheet

One-page printable summary covering trial evidence, nutrient interactions, kosher status, and halacha-aware questions.

Generate sheet
Verifier

Kosher Supplement Verifier

Look up a supplement ingredient or product brand. Get a three-state verdict — Certified ✓, Self-claimed (verify with rav), or No claim — plus the label-check list.

Verify a supplement ↓
Pick a tool to get started Each card opens just that tool — nothing else loads or scrolls past. The Verifier sits at the bottom of this section.
Live Tool · Free Educational only No account required

Kosher Stack Builder

Pick your goal and your halachic constraints. We return a tier-ranked, kosher-verified starter stack. Always confirm kosher certification on each specific product you buy, and consult your physician and your rav.

Live Tool · Free 40 medications · 96 documented depletions

Medication & Nutrient Depletion Check

Type a medication name (brand or generic) or browse by category. We flag nutrient depletions documented in published clinical research — and identify kosher-certified replacements with human evidence.

Or browse all 40 medications by category →

Smoking accelerates turnover of antioxidant nutrients and introduces cadmium, which displaces zinc and lowers selenium bioavailability. The most consistent depletions are vitamin C (plasma levels run ~4× lower than non-smokers), vitamin E, folate, B6, and B12. The combined B-vitamin shortfall raises homocysteine, compounding cardiovascular risk already elevated by smoking itself.

Do not take isolated β-carotene supplements.

Two large randomized trials — ATBC (29,133 smokers, β-carotene 20 mg/day) and CARET (18,314 smokers and asbestos-exposed workers, β-carotene 30 mg/day with retinyl palmitate) — both showed an 18–28% increase in lung cancer and higher all-cause mortality in the supplemented groups. CARET's follow-up found the elevated risk persisted after stopping. Get carotenoids from food instead (orange and dark leafy vegetables, where carotenoids come bundled with the cofactors that keep them protective).

Reasonable repletion targets if you smoke or recently quit

Vitamin C
200–500 mg/day
RDA adds 35 mg/day for smokers as a floor, not a ceiling
Active B-complex
With methylfolate, B6, B12
Particularly if homocysteine is elevated on labs
Vitamin D3
Dosed to 40–60 ng/mL
Target serum 25(OH)D, not a fixed dose
Zinc
15–25 mg/day
Counters cadmium antagonism from tobacco smoke

For carotenoids and vitamin E, choose food sources — nuts, seeds, leafy greens, colored vegetables — rather than isolated high-dose supplements.

The strongest intervention by an order of magnitude is still cessation. Nutrient repletion mitigates — it does not neutralize.
Halacha note

Smoking is widely discouraged by contemporary poskim on pikuach nefesh grounds (e.g., R’ Moshe Feinstein, R’ Eliezer Waldenberg, R’ Ovadia Yosef). This section is offered for those currently smoking or in the recovery window — nutrient support is not an endorsement of continued use. Discuss your situation with your rav and physician.

Citations: ATBC Study (NEJM 1994) · CARET Trial (NEJM 1996) · Albanes 1996 JNCI · CARET 6-yr follow-up. Educational content only — not medical advice. Discuss specifics with your physician and your rav.

Don't see your medication? Submit it for physician review →

We add new entries weekly. Submissions are reviewed by Dr. Sandlow before being added to the public library so every entry has cited evidence and verified kosher routing.

Live Tool · Free 8 at-home tests · kashrut-checked

At-Home Test Library

The same eight at-home and mail-in tests featured on Evidence-Based Longevity (OmegaQuant, Berkeley Life, TruDiagnostic, Everlywell, ZRT, Ulta Lab Tests) — re-framed for the kosher household. Each test card flags the kashrut considerations (collection materials, downstream supplements) and the Shabbat / Yom Tov constraints (saliva collection, finger-stick, fasting, color-reading strips). Test before you supplement.

Or browse all 8 at-home tests by sample type →
Don't see your test? Submit it for review →

We add new tests as new evidence and partner options emerge. Submissions reviewed by Dr. Sandlow before public publication.

Live Tool · Free Quick starter panel

Starter Foundation Panel

New to lab testing? Tell us your age, sex, and goal and we'll return a universal baseline panel grounded in current cardiology, endocrinology, and longevity-medicine guidelines. Then use the At-Home Test Library above to verify the specific markers without leaving your house.

Live Tool · Free · Printable

Physician & Rabbi Discussion Sheet

Fill in once, print, bring to both appointments. Designed for clarity, not for diagnosis.

Live Tool · Free

Cardiovascular Longevity Score

Score yourself across 8 evidence-based factors. The average American scores 65/100.

Kosher Supplement Verifier

Before you buy: look up any supplement by ingredient class or by brand and get a three-state kashrut verdict in seconds. 21 ingredient classes, 11 hechsher agencies, label-check list included.

Live Tool · Free Educational only 21 ingredient classes · 11 hechsher agencies

Verify a supplement

Look up a supplement two ways — by ingredient class (cleanest path) or by brand / product name (free-text search). You get a three-state verdict, the typical kashrut pitfalls for that ingredient, certified brand examples, and a label-check list to confirm at the store. This is educational only. Always confirm certification on the bottle you buy and consult your rav for community-specific standards (Chalav Yisrael, fish gelatin acceptance, etc.).

Certified ✓Reliable hechsher confirmed
Self-claimedPareve in principle — verify with rav
Hechsher requiredAnimal-derived / high pitfall risk

For ambiguous cases — bring it to your rav and physician.

Print the Physician & Rabbi Discussion Sheet to bring evidence, nutrient interactions, kosher status, and halacha-aware questions to your meetings. Sample PDF available in that tool.