How to Support a Healthy Vaginal Microbiome: The Complete Guide

What is the vaginal microbiome, and why does it matter?

The vaginal microbiome is the community of microorganisms that protect against infection, maintain pH balance, and support reproductive health. In a healthy balance, it's dominated by Lactobacillus bacteria, which keep the environment slightly acidic and act as a natural defence against harmful microbes. When that balance shifts, you become more vulnerable to discomfort, infections, and other issues, which is why a healthy vaginal microbiome matters for your daily comfort and long-term health.

→ What Is the Vaginal Microbiome?

What are the signs of an imbalanced vaginal microbiome?

An imbalanced vaginal microbiome can show up in several ways. Common signs include:

• Unusual discharge (changes in texture, colour, or smell)
• Odour, burning, or irritation
• Recurring infections (bacterial or yeast)
• Dryness or sensitivity
• Changes after antibiotics or birth control
• Discomfort during intimacy

These are more meaningful when they happen often or don't resolve on their own.

→ 6 Signs of an Imbalanced Vaginal Microbiome (and What They Mean)

What causes an imbalanced vaginal microbiome?

Several things can disrupt the balance of bacteria, often by lowering protective Lactobacillus levels. Common causes include:

• Antibiotics, which can clear good bacteria along with harmful ones
• Hormonal changes (menstrual cycle, pregnancy, menopause)
• Birth control
• Sexual activity
• Stress and diet

Because the vaginal microbiome is so responsive, even small everyday changes can shift its balance.

→ What Causes Vaginal Imbalance?

How does the vaginal microbiome change through life?

Your vaginal microbiome shifts at every life stage, mostly driven by hormones:

• Birth and puberty: It begins forming at birth, then rising oestrogen in puberty helps protective bacteria flourish.
• Reproductive years: It's at its most balanced, supporting fertility and protecting against infection.
• Pregnancy: The body encourages protective bacteria to help create a safer environment.
• Menopause: As oestrogen falls, protective bacteria decline too, which can bring dryness, irritation, and more vulnerability to infection.

Understanding which stage you're in helps you support your balance through each change.

→ The Vaginal Microbiome Through Life: What Changes and Why

Why does vaginal balance matter for wider health?

A balanced vaginal microbiome does more than keep you comfortable day to day. When the protective Lactobacillus bacteria decline and the balance shifts (known as vaginal dysbiosis), it can raise your risk of infection and has been linked to wider aspects of women's health.

A 2025 review co-authored by the UK's Medicines and Healthcare products Regulatory Agency (MHRA) highlighted the growing potential of vaginal microbiome research, with emerging evidence connecting vaginal balance to:

• Recurrent infections like bacterial vaginosis, which affects an estimated 23 to 29% of women of reproductive age
• Fertility and pregnancy outcomes, including preterm birth
• Menopause-related changes, as protective bacteria decline with falling oestrogen

Researchers describe this as a promising but still-developing field, so testing is best seen as a way to understand and support your balance, not to diagnose conditions. Paying attention to your vaginal health is a proactive step in looking after your overall wellbeing.

Sources: MHRA review, Frontiers in Cellular and Infection Microbiology, 2025; [GOV.UK]

https://www.frontiersin.org/journals/cellular-and-infection-microbiology/articles/10.3389/fcimb.2025.1595182/full

How do you improve your vaginal microbiome?

You support a healthy vaginal microbiome mostly by protecting the good Lactobacillus bacteria and avoiding what disrupts them. The main things that help:

• Avoid douching and harsh washes: The vagina is self-cleaning, and scented products or douching strip protective bacteria and disrupt pH.
• Choose breathable underwear: Cotton and looser clothing help reduce moisture and irritation that can throw off balance.
• Be mindful with antibiotics: Only use them when needed, as they can clear good bacteria along with harmful ones.
• Support your gut and overall health: A balanced diet, including fibre and fermented foods, supports your whole microbiome, including down there.
• Stay hydrated and manage stress: Both affect your body's natural balance and immune defences.
• Practise safe, gentle intimate care: Wiping front to back and urinating after sex can help reduce the risk of infection.

Because the vaginal microbiome is so responsive to hormones and lifestyle, supporting it is about consistency and gentleness rather than quick fixes.

How do you know what your body actually needs?

The only way to know your vaginal microbiome's specific balance is to test it, because every woman's is different. Testing shows you your own picture, which bacteria are protecting you, where the balance may be shifting, and what that means, so you can act early instead of guessing.

→ Health Checks Before Pregnancy
→ Planning a Family: The Complete Guide