What Your Vaginal Microbiome Says About Your Mental Health & More

From uncertainty-induced inhibition to fun-seeking behavioral activation (no, not necessarily that kind of fun, but also not necessarily not that!), there’s a lot going on down there:

As above, so below?

A team of Italian researchers (Dr. Clarissa Consolandi et al.) did a cross-sectional study of 105 women of reproductive age, combining vaginal microbiome sequencing, metabolite analysis, and questionnaires measuring motivation, reward responsiveness, behavioral inhibition, anxiety, depression, stress, and emotional regulation.

Specifically,

❝These included the Behavioral Activation System (BAS), Behavioral Inhibition System (BIS), State-Trait Anxiety Inventory (STAI-Y2), Difficulties in Emotion Regulation Scale (DERS), Beck Depression Inventory (BDI), Perceived Stress Scale (PSS), and Psychosomatic Problem Scale (PSP). The investigators used linear regression adjusted for demographic and health-related factors to examine how CST profiles related to psychological outcomes. Structural equation modeling (SEM) was then used to estimate direct and indirect statistical associations involving CSTs, metabolites, and psychological scores.❞

First, let’s meet the vaginal communities: the microbiome profiles can be sorted into the most common community-state types (CSTs), namely CST I, II, and V, which together accounted for 52.4% of participants; CST III, dominated by Lactobacillus iners, occurred in 30.5%, while CST IV, characterized by a more diverse microbial community with reduced Lactobacillus dominance, occurred in 17%.

Next, what wasn’t found: no significant associations were found between microbiome profiles and trait anxiety, depression, perceived stress, overall emotion-regulation difficulties, or somatization.

As for motivation and behavioral responses: people with CST IV had lower reward responsiveness and goal-directed motivation scores, while those with CST III had lower behavioral inhibition scores, indicating less inhibition in response to uncertainty or potential threats.

• Further, CST IV was associated with lower lactate and several amino acids, including valine-related findings, alongside higher short-chain fatty acids, sugars, and biogenic amine-related metabolites; exploratory analyses linked lower aminobutyrate (GABA) and valine levels with lower reward responsiveness and motivation scores, respectively.
• Notably, higher phenylalanine levels tended to correlate with higher behavioral inhibition scores, while benzoate showed the opposite pattern; valine, threonine, lactate, and GABA were associated with reward responsiveness, and valine was positively associated with goal-directed motivation, and the same amino acids plus cadaverine were associated fun-seeking behaviors.

You can find the paper in full, here: Integrated microbiome and metabolomic analysis reveals associations between vaginal microbiota composition and psychological profiles

Want to look after your vaginal microbiome health?

You might want to consider: Vaginal Probiotics: What Does The Science Say?

And do be careful, because of: What Causes Yeast Infections, & How To Get Rid Of Them?

Alternatively, if you have dryness issues down there, see: Vaginal Dryness In Menopause | Causes & Solutions (see also: Is It Worth Taking Testosterone In Menopause?)

Or if you have the opposite problem in some regard, then we’ve got you covered too: What Is Vaginal Discharge Anyway, And Is Yours Healthy?

And lastly, by all means check out: A Dermatologist’s Guide To Intimate Aging Skin Care

Take care!