Hormone health: What are phytoestrogens?

Phytoestrogens are naturally occurring compounds found in certain plant foods. They are structurally similar to oestrogen and can interact with oestrogen receptors in the body, although their activity is much weaker than the body’s own oestrogen.

Because of this, phytoestrogens are often discussed in the context of hormone health and dietary patterns across different life stages.

Types of phytoestrogens

There are three main groups of phytoestrogens commonly found in foods:

1. Isoflavones, found in foods such as soya beans, edamame beans, broad beans, lentils, chickpeas, broccoli and cauliflower

2. Lignans, found in flaxseeds, sesame seeds, sunflower seeds, pumpkin seeds, kale, cabbage, Brussels sprouts, fennel, onion, garlic, apples, pears, carrots, asparagus, wheat, barley, rye and oats

3. Coumestans, found in smaller amounts in foods such as split peas, pinto beans, alfalfa and soybean sprouts

Including a variety of plant foods in the diet naturally provides a mix of these compounds.

Phytoestrogens and hormone health

Phytoestrogens are sometimes described as having a modulating effect in the body, meaning they can interact with oestrogen receptors without acting in the same way as endogenous hormones. This is why they are often discussed in relation to hormonal transitions, rather than as a way of increasing or lowering hormone levels.

Individual responses to phytoestrogen-containing foods vary and are influenced by overall diet, gut health, life stage and genetics.

Phytoestrogens during perimenopause

During perimenopause, levels of oestrogen naturally fluctuate and gradually decline over time. Some women choose to include phytoestrogen-rich foods as part of a balanced diet during this life stage.

Research in this area is ongoing, and experiences differ between individuals. Phytoestrogen-containing foods are best viewed as one part of a varied dietary pattern that supports overall wellbeing, rather than a targeted approach to specific symptoms.

Phytoestrogens and bone health

Oestrogen plays a role in maintaining normal bone structure, and interest has grown around how plant-based compounds interact with this process. Some studies have explored associations between diets rich in phytoestrogen-containing foods and markers related to bone health, though findings are mixed and research continues.

A diet that includes a wide range of plant foods, alongside adequate protein, minerals and movement, supports general health across life stages.

Phytoestrogens and the menstrual cycle

Menstrual experiences are influenced by many factors, including hormones, stress, sleep, nutrition and overall health. Phytoestrogen-containing foods are sometimes discussed in relation to cyclical changes, though responses vary and no single food or nutrient determines menstrual health.

Awareness of personal patterns and seeking medical advice when symptoms are persistent or disruptive remains important.

Phytoestrogens, skin and general wellbeing

Hormonal fluctuations can coincide with changes in skin, energy and mood for some people. Diets that include a wide range of whole plant foods provide fibre, vitamins and phytonutrients that support overall health, including digestive and skin health.

Rather than focusing on specific outcomes, phytoestrogen-containing foods are best considered as part of a nourishing, balanced way of eating.

Phytoestrogens and the gut

Phytoestrogens are processed by gut bacteria, meaning gut health plays a role in how they are metabolised. A varied diet rich in fibre from vegetables, fruits, legumes, wholegrains, nuts and seeds supports a diverse gut microbiome.

Supplement use should be considered on an individual basis and discussed with a qualified professional where appropriate.

A gentle, sustainable approach

Supporting hormone health does not require perfection. Small, realistic changes such as eating regularly, including a variety of plant foods, prioritising rest and managing stress can support the body’s natural rhythms over time.

When to seek medical advice 

If symptoms feel persistent, worsening or are affecting your quality of life, it is important to seek personalised medical advice. Hormonal concerns are complex and benefit from appropriate assessment and support.

If you would like to talk about personalised nutrition and lifestyle support during hormonal change, you are welcome to book a FREE 30 minute  discovery call here:

https://calendly.com/eatwell22/discovery-call

Thank you for reading 'Hormone health: What are phytoestrogens?'. I hope you have found it helpful. If you have topics that you'd like me to cover, please let me know.

This article is intended for general education and wellbeing support only. As a qualified nutritional therapist and health coach, I offer lifestyle and nutrition guidance but do not diagnose or treat medical conditions. Please consult your GP or another appropriate healthcare professional for individual medical advice.

Hormone health: What are phytoestrogens?

by Julie Gough