The Longevity Supplement Bible — 21 Ingredients Ranked A–F by Actual Evidence

The Longevity
Supplement Bible

You're spending £200 a month on supplements based on four YouTube videos, two Reddit threads, and a podcast where a man with a PhD and a supplement line said "reverse your biological age" seven times. You are almost certainly buying the wrong things. This guide fixes that.

21 supplements graded A–F by actual clinical evidence. No sponsors. No affiliate links. No product placement. Just the science — and a clear verdict on each one.

50+ pages 21 supplements 15,000 words 2026 edition

FREE

Longevity Latest

The Longevity
Supplement
Bible

21 Ingredients Ranked A–F
by Actual Evidence

By Christian Thomsen

£135

saved per month

"I was spending £180/month on supplements. After reading this guide I dropped to £45/month — and I'm more confident in what I'm actually taking. The curcumin entry alone saved me a fortune."

— Healthcare professional, London

What's Inside

50 pages of evidence you can actually use

A–F Evidence Grades

Every supplement graded against the same five-dimension framework. Human RCTs weighted at 40%. No grade inflation.

The Principle + The Verdict

Each entry explains the mechanism, examines the evidence, and delivers a clear verdict: take it, skip it, or watch the research.

Quick Reference Boxes

Form & dose, who it's best for, who should skip it, cost-effectiveness assessment, and dietary alternatives — for every single entry.

"If You Could Only Take Five"

A priority-ranked shortlist with costs. The entire stack costs less per month than a single bottle of NMN.

The Stacking Problem

Why taking 12 supplements isn't better than taking 4. And how to know when your pill organiser has outgrown your evidence.

Blood Testing Guide

Which biomarkers to test, how often, and what the numbers actually mean. So you measure instead of guess.

The Scorecard

21 supplements. One honest grading system.

Here's a preview of the grades. The full guide explains every single one.

Grade	Supplement	Category
B+	Creatine	Foundations
B+	Omega-3 (EPA/DHA)	Foundations
B	Vitamin D3 + K2	Foundations
B	Magnesium	Foundations
B−	CoQ10 / Ubiquinol	Mitochondrial
B−	NAC	Antioxidant
C+	NMN	NAD+ Booster
C+	NR	NAD+ Booster
C+	Spermidine	Senolytics
C+	Berberine	Metabolic
C+	Glycine	Antioxidant
C+	Taurine	Metabolic
C	Quercetin	Senolytics
C−	Curcumin	Antioxidant
C−	Alpha-Lipoic Acid	Mitochondrial

6 more grades + the full evidence behind every one...

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Christian Thomsen

Editor and writer behind Longevity Latest. No financial relationships with any supplement manufacturer — which is why the grades in this guide reflect the science rather than a business model. The guide is published by Longevity Latest, a FrontWave Media publication.

What Readers Say

Honest reactions from early readers

From the 4,000+ people who've downloaded the guide so far.

"I'd been taking NMN for two years because Andrew Huberman mentioned it. This guide made me realise the evidence is a C+ at best — and creatine at 6p per day has stronger data. Genuinely changed my stack."

— Biohacker, 38, Amsterdam

"Finally, someone willing to say 'the evidence doesn't support this' instead of hedging. I've sent it to three friends who are deep in the supplement rabbit hole."

— Longevity Latest subscriber since Issue #2

"The blood testing guide at the end is worth the download on its own. I brought it to my GP and she said it was the most sensible supplement advice she'd seen from a non-medical source."

— Software engineer, Berlin

Common Questions

Before you download

Is it really free? What's the catch?

No catch on the free path. The guide arrives via Longevity Latest, our free weekly newsletter covering evidence-based longevity research. You can unsubscribe immediately after downloading and keep the PDF forever. We don't sell supplements. If you'd rather not subscribe, you can buy the guide outright for $14.95 — instant download, no newsletter.

Who wrote this? Are they selling supplements?

Christian Thomsen, editor of Longevity Latest. He has no financial relationships with any supplement manufacturer. The guide has no affiliate links, no product placement, and no sponsored content. Grades are based purely on published evidence.

How is this different from other supplement guides?

Most guides are written by people selling supplements, or by cautious physicians who won't recommend anything. This guide occupies the gap: transparent methodology, an explicit grading rubric, and willingness to say "the evidence doesn't support this" regardless of how popular the product is.

Is this medical advice?

No. It's an evidence-graded decision tool for generally healthy adults. Always consult your doctor before starting any supplement, particularly if you take prescription medications.

Stop guessing.
Start knowing.

21 supplements. A–F evidence grades. The honest guide the supplement industry hopes you never read.

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