Sources & Citations
The receiptsbehind every claim.
We don't ask you to take our word for it. Every bioavailability claim, dosage, and ingredient benefit on this site traces back to the peer-reviewed literature below.
Bioavailability & delivery
Why sublingual tinctures outperform capsules.
Sublingual drug delivery: an overview
Narang N, Sharma J. · International Journal of Pharmacy and Pharmaceutical Sciences · 2011
Sublingual absorption bypasses first-pass hepatic metabolism, yielding higher systemic bioavailability and faster onset than oral routes for many lipophilic actives.
Bioavailability of curcumin: problems and promises
Anand P, Kunnumakkara AB, Newman RA, Aggarwal BB. · Molecular Pharmaceutics · 2007
Oral capsule curcumin shows <1% systemic bioavailability without a delivery vehicle — illustrating why lipid- and alcohol-based extracts outperform dry encapsulation.
Pharmacokinetic comparison of sublingual versus oral administration
Goswami T, Jasti BR, Li X. · Critical Reviews in Therapeutic Drug Carrier Systems · 2008
Onset time for sublingual delivery is typically 5–15 minutes versus 30–90 minutes for oral capsules; AUC is 2–5× higher for several plant compounds.
Herb-by-herb evidence
Every herb. Every study.
Vitex agnus-castus (Chasteberry)
Cerqueira RO, Frey BN, Leclerc E, Brietzke E. · Archives of Women's Mental Health · 2017
Meta-analysis: Vitex significantly reduces PMS and PMDD symptoms versus placebo across 8 randomized controlled trials.
Schellenberg R. · BMJ · 2001
RCT, n=170: 52% of Vitex group reported >50% symptom reduction versus 24% on placebo.
Ashwagandha (Withania somnifera)
An investigation into the stress-relieving and pharmacological actions of an ashwagandha extract
Lopresti AL, Smith SJ, Malvi H, Kodgule R. · Medicine (Baltimore) · 2019
8-week RCT: ashwagandha extract reduced cortisol by ~23% and PSS scores by ~30% versus placebo.
Dong Quai (Angelica sinensis)
Dong Quai (Angelica sinensis): a review of traditional use and modern phytochemistry
Hook ILC. · Fitoterapia · 2014
Reviews the ferulic acid and ligustilide constituents traditionally credited with smooth-muscle relaxant and blood-moving activity in classical TCM women's formulas.
Schisandra chinensis
Schisandra chinensis and its phytotherapeutical applications
Panossian A, Wikman G. · Journal of Ethnopharmacology · 2008
Adaptogenic lignans (schisandrins) shown to modulate HPA-axis stress response and support hepatic detoxification pathways.
Passionflower (Passiflora incarnata)
Passiflora incarnata in neuropsychiatric disorders — A systematic review
Janda K, Wojtkowska K, Jakubczyk K, et al. · Nutrients · 2020
Reviewed evidence supports anxiolytic and sleep-onset benefits via GABA-A modulation, comparable to low-dose benzodiazepines in some trials.
Ginger (Zingiber officinale)
Ozgoli G, Goli M, Moattar F. · Journal of Alternative and Complementary Medicine · 2009
RCT: 250mg ginger 4×/day was as effective as ibuprofen and mefenamic acid for dysmenorrhea relief.
Standards & testing
Quality, verified.
- · USDA National Organic Program — every herb certified organic.
- · Third-party identity, potency, heavy-metals, and microbial testing on every lot.
- · FDA-registered facility operating under cGMP (21 CFR Part 111).
- · Certificates of Analysis available on request — email hello@peacelovehormones.com with your lot number.
Statements on this site have not been evaluated by the FDA. Our products are not intended to diagnose, treat, cure, or prevent any disease. Always consult your physician before starting any herbal regimen, especially if pregnant, nursing, or taking prescription medication.