The menopause is a natural stage in a woman’s life, during which significant changes occur on both a physical and an emotional level[19].
Starting from premenopause, the production of the hormones that regulate the reproductive system in fertile women – oestrogens and progesterone – steadily declines.
As a result, the menstrual cycle becomes irregular (periods may be absent for a few months or come closer together) until it stops altogether.
The gradual decline in oestrogens that occurs in this phase is the main cause of the typical, bothersome complaints of the menopause[20].
To make up for this progressive decline, people usually turn to food supplements based on isoflavones, a family of natural molecules that can “mimic” the activity of oestrogens.
From Soya to Red Clover and Kudzu: more effective and more easily absorbed
First-generation menopause supplements offered isoflavones from Soya (Glycine max). However, they are not very effective in counteracting menopause-related complaints[21].
Today, modern menopause supplements NO LONGER include soya because it contains only 2 isoflavones (Genistein and Daidzein), in a glycosylated form that prevents their optimal and rapid absorption in the human body[22], and as a result they are of very limited effectiveness.
In addition, the soya available on the market today is more and more often genetically modified.
In the natural and herbal products sector, increasing attention is being paid to avoiding plant extracts from GMO crops4.
For these reasons, second-generation menopause supplements have moved on to other plant active ingredients, in particular Red Clover (Trifolium pratense), which provides as many as 4 isoflavones, most of which are already in an absorbable form, without the glycoside part, making them more rapidly absorbed and more bioavailable[23].
Red Clover is therefore better suited than soya to supporting menopausal women, and at Salugea we have combined it with Kudzu (Pueraria lobata), a wild plant native to Japan.
As well as providing as many as 6 different types of isoflavones, Kudzu is particularly effective in rebalancing the cardiovascular imbalances of the menopause, such as blood pressure swings, hypertension and palpitations11.
The effectiveness of Kudzu extract is also due to one of its particular isoflavones, Puerarin11, which, as well as being easily absorbed, stands out for its very high bioavailability, remarkable stability and longer persistence in the bloodstream compared with other types of isoflavones.
The Dioscorea innovation
Over time, isoflavones extracted from Red Clover and Kudzu have therefore replaced those extracted from soya. Their oestrogen-like function helps make up for the sudden lack of oestrogens in menopausal women.
But, as mentioned, levels of progesterone, another important hormone, also fall during this phase. How can it be supplemented?
By adding Dioscorea plant extract, which provides a specific active ingredient (Diosgenin) with a natural “progestogenic” action and is therefore useful for true hormonal balance13.
Let’s now look at some in-depth studies carried out on these active ingredients.
Experimental Phytotherapy
The Pausanorm Forte formulation contains Red Clover, Kudzu, Dioscorea, Angelica Sinensis and Vervain.
Red Clover
- J Obstet Gynaecol. 2016;36(3):301-11. doi: 10.3109/01443615.2015.1049249. Epub 2015 Oct 15. Red clover for treatment of hot flashes and menopausal symptoms: A systematic review and meta-analysis. Ghazanfarpour M, Sadeghi R, Roudsari RL, Khorsand I, Khadivzadeh T, Muoio B
This study assessed the effectiveness of red clover in relieving hot flushes and menopausal symptoms in peri/postmenopausal women. The average frequency of hot flushes in the red clover groups was lower than in the control groups. In addition, subjective (vaginal dryness) and objective symptoms of vaginal atrophy showed a significant improvement with a dose of 80 mg of red clover a day.
Kudzu
- Puerarin: a review of pharmacological effects. Zhou YX, Zhang H, Peng C. Phytother Res. 2014 Jul;28(7):961-75. doi: 10.1002/ptr.5083. Epub 2013 Dec 13. Review.
This study analysed the beneficial effects of puerarin in various physiological applications. These may all be due to its broad spectrum of functional properties, such as vasodilation, cardioprotection, neuroprotection, antioxidant, anti-inflammatory and analgesic action, support for bone formation, inhibition of alcohol absorption and attenuation of insulin resistance.
- Br J Nutr . 2003 Jun;89 Suppl 1:S45-58. doi: 10.1079/BJN2002796. Bioavailability of phyto-oestrogens. Ian Rowland 1, Marian Faughnan, Leane Hoey, Kristiina Wähälä, Gary Williamson, Aedin Cassidy
This study focused on how differently isoflavones are absorbed depending on the type chosen. Kudzu is among the most easily absorbed. This sets it apart from soya, whose bioavailability is less certain.
Dioscorea Villosa
- Am J Chin Med. 2009;37(1):159-67.doi: 10.1142/S0192415X09006746. Estrogen activities and the cellular effects of natural progesterone from wild yam extract in mcf-7 human breast cancer cells. Mi-Kyung Par, Hyeok-Yi Kwon, Woong-Shick Ahn, Sumi Bae, Mee-Ra Rhyu, Youngjoo Lee
According to this study, Dioscorea works by increasing the activity of progesterone receptors in cells sensitive to this hormone, managing to stimulate a physiological response even when the hormone is present in small amounts. This makes it useful during the menopause to help restore hormonal balance.
Angelica Sinensis
- Estrogenic activity of standardized extract of Angelica sinensis. Circosta C, Pasquale RD, Palumbo DR, Samperi S, Occhiuto F. Phytother Res. 2006 Aug;20(8):665-9.
This study assessed and demonstrated the oestrogenic activity of a standardised extract of Angelica sinensis roots, used to relieve climacteric symptoms.
Vervain
- Novel neuroprotective effects of the aqueous extracts from Verbena officinalis Linn. Lai SW, Yu MS, Yuen WH, Chang RC. Neuropharmacology. 2006 May;50(6):641-50. Epub 2006 Jan 6.
In this study, researchers demonstrated the neuroprotective effects of Verbena officinalis and showed that these are not merely the product of “folk medicine” beliefs, but can be verified using scientific methods.
Bibliography
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[2] Grandi G, Facchinetti F, Melotti C, Sgandurra A. Phyto-progestins for the treatment of abnormal uterine bleeding without organic cause in women at high risk for breast cancer and breast cancer survivors: a prospective, pilot study. Gynecol Endocrinol. 2023;39(1):2239936. doi:10.1080/09513590.2023.2239936.
[3] Vitale DC, Piazza C, Melilli B, Drago F, Salomone S. Isoflavones: estrogenic activity, biological effect and bioavailability. Eur J Drug Metab Pharmacokinet. 2013;38(1):15-25. doi:10.1007/s13318-012-0112-y.
[4] Editoriale Domani – Politica – Mondo – L’Esperienza del Brasile – La soia è ovunque, anche dove non immagini. Ed è tutta ogm. [Brazil’s experience – Soya is everywhere, even where you wouldn’t imagine. And it’s all GMO.]
[5] Hadi THS, Santoso B, Hardianto G, Kurniawati EM. The effect of isoflavone on vaginal dryness and dyspareunia in postmenopausal symptoms: a systematic review and meta-analysis. Obstet Gynecol Sci. 2025;68(2):131-138. doi:10.5468/ogs.24282.
[6] Lipovac M, Chedraui P, Gruenhut C, Gocan A, Kurz C, Neuber B, Imhof M. Effect of Red Clover Isoflavones over Skin, Appendages, and Mucosal Status in Postmenopausal Women. Obstet Gynecol Int. 2011;2011:949302. doi: 10.1155/2011/949302. Epub 2011 Nov 1. PMID: 22135679; PMCID: PMC3206499.
[7] Wang S, Zhang S, Wang S, Gao P, Dai L. A comprehensive review on Pueraria: Insights on its chemistry and medicinal value. Biomed Pharmacother. 2020;131:110734. doi:10.1016/j.biopha.2020.110734.
[8] J Obstet Gynaecol. 2016;36(3):301-11. doi: 10.3109/01443615.2015.1049249. Epub 2015 Oct 15. Red clover for treatment of hot flashes and menopausal symptoms: A systematic review and meta-analysis. Ghazanfarpour M, Sadeghi R, Roudsari RL, Khorsand I, Khadivzadeh T, Muoio B..
[9] Goyal N, Chaudhary R, Aggarwal K, et al. Red Clover Supplementation Alleviates Neurological Deficits in Estrogen Deficient Rats Exposed to Chronic Unpredictable Mild Stress. Eur J Neurosci. 2025;61(12):e70164. doi:10.1111/ejn.70164.
[10] Zhou YX, Zhang H, Peng C. Puerarin: a review of pharmacological effects. Phytother Res. 2014 Jul;28(7):961-75. doi: 10.1002/ptr.5083. Epub 2013 Dec 13. PMID: 24339367.
[11] Kim JE, Jeong H, Hur S, Lee J, Kwon O. Efficacy and Safety of Kudzu Flower-Mandarin Peel on Hot Flashes and Bone Markers in Women during the Menopausal Transition: A Randomized Controlled Trial. Nutrients. 2020;12(11):3237. Published 2020 Oct 22. doi:10.3390/nu12113237.
[12] Semwal P, Painuli S, Abu-Izneid T, et al. Diosgenin: An Updated Pharmacological Review and Therapeutic Perspectives. Oxid Med Cell Longev. 2022;2022:1035441. Published 2022 May 29. doi:10.1155/2022/1035441.
[13] Climacteric. 2011 Feb;14(1):132-9. doi: 10.3109/13697137.2010.498594. Epub 2010 Jul 23. The assessment of efficacy of Dioscorea alata for menopausal symptom. Hsu CC, Kuo HC, Chang SY, Wu TC, Huang KE.
[14] Circosta C, Pasquale RD, Palumbo DR, Samperi S, Occhiuto F. Estrogenic activity of standardized extract of Angelica sinensis. Phytother Res. 2006;20(8):665-669. doi:10.1002/ptr.1928.
[15] Xin YF, Zhou GL, Shen M, et al. Angelica sinensis: a novel adjunct to prevent doxorubicin-induced chronic cardiotoxicity. Basic Clin Pharmacol Toxicol. 2007;101(6):421-426. doi:10.1111/j.1742-7843.2007.00144.x.
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[18] Vicariotto F, Malfa P, Viciani E, et al. Efficacy of Lactiplantibacillus plantarum PBS067, Bifidobacterium animalis subsp. lactis BL050, and Lacticaseibacillus rhamnosus LRH020 in the Amelioration of Vaginal Microbiota in Post-Menopausal Women: A Prospective Observational Clinical Trial. Nutrients. 2024 Jan 30;16(3):402. doi: 10.3390/nu16030402. PMID: 38337685; PMCID: PMC10857347.
[19] Nature Menopause. S.R. Davis, I.Lambrinoudaki, M. Lumsden, G.D. Mishra, L. Pal, M. Rees, N. Santoro & T. Simoncini.
[20] Ministero della Salute - Salute della Donna – Menopausa [Italian Ministry of Health – Women’s Health – Menopause].
[21] Levis S, Strickman-Stein N, Ganjei-Azar P, Xu P, Doerge DR, Krischer J. Soy Isoflavones in the Prevention of Menopausal Bone Loss and Menopausal Symptoms: A Randomized, Double-blind Trial. Arch Intern Med. 2011;171(15):1363–1369. doi:10.1001/archinternmed.2011.330.
[22] Br J Nutr. 2003 Jun;89 Suppl 1:S45-58. Bioavailability of phyto-oestrogens. Rowland I, Faughnan M, Hoey L, Wähälä K, Williamson G, Cassidy A..
[23] Maul R, Kulling SE. Absorption of red clover isoflavones in human subjects: results from a pilot study. Br J Nutr. 2010 Jun;103(11):1569-72. doi: 10.1017/S0007114509993564. Epub 2010 Jan 13. PMID: 20067656.
Pausanorm Forte is a food supplement: read the warnings on the label. Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. Our content is for informational purposes only: it is not intended as an indication for the diagnosis or treatment of medical conditions and is in no way meant to replace your doctor’s advice.
Our texts are for information purposes only; they are not to be understood as an indication for the diagnosis and treatment of medical conditions and are in no way intended to replace the advice of a doctor.