Spartamax Guide
References and Sources
Every important page on this site carries its own reference list. This page collects the principal sources in one place, organized by topic, so readers can verify our claims and read further.
Vendor documents (product-specific facts)
Regulatory
- FDA 101: Dietary Supplements
- 21 CFR 101.36 — Supplement Facts labeling
- FDA CGMP for Dietary Supplements (21 CFR 111)
- FDA: Tainted Sexual Enhancement Products
- FTC Endorsement Guides
NIH resources
- ODS: Ashwagandha
- ODS: Dietary Supplements for Exercise and Athletic Performance (arginine, citrulline, nitrate)
- ODS: Zinc
- ODS: Vitamin D
- LiverTox: Ashwagandha
- NIDDK: Erectile Dysfunction
Peer-reviewed studies by ingredient
L-arginine
Tongkat Ali
- Thu 2017 — systematic review of clinical studies
- Talbott 2013 — stress hormones and mood
- Leitão 2021 — 6-month trial in aging males