Home › Buyer Guides
Practical Guides

Buyer Guides

How to verify that the supplement in your hand matches the dose in the published research. Label-reading checklists, third-party seal coverage, and the working filter for choosing between brands.

Buyer Guide

Black Seed Oil Buyer Guide: How to Verify Thymoquinone (TQ) Content, Read HPLC Certificates of Analysis, and Avoid the 10x Variability Trap Before You Buy

Most commercial black seed oil delivers 4-8x less thymoquinone than the trials studied. This guide gives consumers the working checklist for closing that gap — how to read a CoA, the role of HPLC vs GC, what ≥2% TQ actually buys you, and a 7-point pre-purchase check.

A consumer-facing guide to closing the gap between clinical trial doses of thymoquinone (the active compound in Nigella sativa) and what commercial bottles actually deliver. Covers HPLC reading, th…

4 min read Read guide ›
Buyer Guide

Tongkat Ali Buyer Guide: How to Verify Eurycomanone Standardization (≥0.8% by HPLC), Read the LJ100 vs. Physta vs. Eurycoma longifolia Species Identity, and Avoid the 5–10× Root-Powder Standardization Gap Before You Buy

Most commercial tongkat ali delivers 5–10× less eurycomanone than the LJ100/Physta trial doses used in Talbott 2013 and Henkel 2014. This guide gives consumers the working checklist for closing that gap — how to read a CoA, the HPLC eurycomanone % cutoff (≥0.8% for trial match, ≥1% for full replication), why "200:1 extract" labels are misleading, how to distinguish E. longifolia from the fraud-prone E. latifolia labeling, and a 7-point pre-purchase check.

A consumer-facing guide to closing the gap between clinical trial doses of eurycomanone (the principal bioactive in Eurycoma longifolia root) and what commercial bottles actually deliver. The Talbo…

4 min read Read guide ›
Buyer Guide

Magnesium Threonate Buyer Guide: How to Verify Magtein® Brand Authenticity vs Generic L-Threonate, Read the Elemental-Magnesium Math (Liu 2016 ~2 g/day Trial Dose), Distinguish L-Threonate from Glycinate/Citrate/Oxide Chases, and Avoid the Generic-Threonate Trap Before You Buy

Most commercial magnesium threonate bottles are not the same intervention as the Magtein® used in Slutsky 2010 (rat BBB) or Liu 2016 (n=44 Biogerontology). This guide covers the form name (L-threonate, not "threonate"), the elemental-mg math (Liu 2016 used ~1.5-2 g/day), Magceinics/NBTY/MIT trademark provenance, what USP/NSF/ConsumerLab seals actually verify, and a 6-point pre-purchase check.

A consumer-facing guide to closing the gap between clinical trial materials of Magnesium L-threonate and what commercial bottles actually deliver. The Liu 2016 (n=44 Biogerontology) RCT tested Magt…

4 min read Read guide ›