The 4 Probiotic Strains That
Actually Protect Intimate Health
Walk into any pharmacy and you will find dozens of probiotic supplements. Most are formulated for the gut — and the gut is where they stay. Vaginal colonisation requires specific strains with documented adhesion to vaginal epithelial cells, lactic acid production, and survival at low pH. Most gut probiotics have none of these properties.
FloraGuard contains four strains that do. Here is what each one actually does, and why it was chosen.
The most dominant strain in a healthy vaginal microbiome. L. crispatus is a prolific lactic acid producer, directly maintaining the low-pH environment that makes life difficult for pathogens. Its presence is the single strongest predictor of vaginal health.
One of the most studied probiotics in existence. L. rhamnosus has demonstrated benefits across both gut and vaginal health, with particular evidence for reducing the recurrence of bacterial vaginosis and yeast infections in clinical trials.
L. reuteri produces both lactic acid and hydrogen peroxide — a dual antimicrobial mechanism that makes it one of the most protective strains available. It is also involved in modulating local immune responses in vaginal tissue.
The most widely documented probiotic strain, L. acidophilus adheres strongly to vaginal epithelial cells, establishing a physical barrier. It complements the other three strains by ensuring consistent colonisation over time.
"Strain specificity is everything. The difference between a probiotic that works in the vaginal environment and one that doesn't is not the genus — it's the strain."
Together, these four strains address the full picture of what oestrogen decline disrupts: pH balance, protective acidity, antimicrobial activity, and physical colonisation. No single strain does all of this. That is why FloraGuard uses four.
FloraGuard delivers all four clinically studied strains in a single daily capsule — formulated specifically for women 45 and over.
30-day money-back guarantee. Ships to UK & EU.