References and Verification Register

How these references are used

Government scientific and health sources provide general evidence. Seller websites describe marketing or transaction terms. Third-party label transcriptions are provisional until independently authenticated against the physical bottle.

Independent and public-health sources

• FDA — Questions and Answers on Dietary Supplements
• NCCIH — Saw Palmetto: Usefulness and Safety
• NCCIH — Complementary Health Approaches for BPH
• NIDDK — Enlarged Prostate (Benign Prostatic Hyperplasia)
• NCCIH — Ginkgo
• NCCIH — Asian Ginseng
• NIH ODS — Niacin Fact Sheet
• NIH ODS — Vitamin E Fact Sheet
• NCCIH — Hawthorn

Seller and third-party material (not independent evidence)

• Third-party Protoflow label transcription — not independently authenticated
• ProtoFlow seller-facing marketing page — claims require corroboration
• Third-party Protoflow pricing summary — prices may change
• Protoflow-branded refund page — verify at actual checkout

Editorial boundaries

We do not authenticate online stock, domain ownership, merchant authorization, product trials or current package terms from a marketing claim alone. Source retrieval is not an endorsement.