Estrogen recycling (Estrobolome)

The estrobolome is a network of over 60 genera of bacteria that can recycle or deconjugate inactivated estrogens for reabsorption into circulation by producing very powerful enzymes. This recycling process is handled by gut bacteria with beta-glucuronidase and beta-glucosidase activity. When the estrobolome is too abundant, the body is unable to efficiently eliminate estrogen, causing estrogens to build up and ultimately leading to estrogen dominance. On the other hand, if estrogen recycling (estrobolome) is too low, then this may lead to insufficient levels of estrogen in circulation.

Low levels of Estrogen Recycling (Estrobolome) on a BiomeFx panel indicate a reduced capacity of gut bacteria to metabolize and regulate estrogen levels within the body. The estrobolome refers to the collection of gut microbes that influence estrogen metabolism, primarily through the activity of β-glucuronidase, an enzyme that deconjugates estrogen, allowing it to be reabsorbed into circulation.

Potential Implications of Low Estrogen Recycling:

1. Reduced Estrogen Reabsorption

   • Low β-glucuronidase activity means that estrogens are more likely to be excreted rather than reabsorbed, leading to lower circulating estrogen levels.
   • This may contribute to estrogen deficiency symptoms, such as irregular menstrual cycles, vaginal dryness, mood changes, and reduced bone density.

2. Hormonal Imbalances

   • Estrogen plays a key role in regulating other hormones like progesterone and testosterone. Poor recycling could disrupt this balance, potentially affecting reproductive health, metabolism, and mood regulation.

3. Increased Risk of Osteoporosis and Cardiovascular Issues

   • Estrogen is protective against bone loss and cardiovascular disease. Lower levels due to reduced recycling may increase long-term risks.

4. Gut Dysbiosis and Microbial Diversity Issues

   • A compromised estrobolome may indicate low microbial diversity, especially a deficiency in beneficial bacteria like Bacteroides, Clostridium, and Bifidobacterium species, which contribute to estrogen metabolism.

5. Potential Links to Perimenopause or Postmenopause

   • If seen in pre- or postmenopausal individuals, it may reflect natural declines in estrogen metabolism, though gut microbiome support could help optimize hormone balance.

How to Support Estrogen Recycling:

• Increase Prebiotic and Fiber Intake (supports beneficial gut bacteria)
  • Flaxseeds, cruciferous vegetables, and whole grains
• Include Probiotic-Rich Foods
  • Yogurt, kimchi, sauerkraut, and kefir to enhance gut bacterial diversity
• Optimize Liver Function
  • The liver plays a key role in conjugating estrogen, so reducing toxin exposure and supporting liver detoxification (via cruciferous veggies, green tea, and adequate hydration) can help.
• Assess β-Glucuronidase Activity
  • If excessively low, supplementing with probiotics or enzymes may be beneficial.

The estrobolome is a network of over 60 genera of bacteria that can recycle or deconjugate inactivated estrogens for reabsorption into circulation by producing very powerful enzymes. This recycling process is handled by gut bacteria with beta-glucuronidase and beta-glucosidase activity. When the estrobolome is too abundant, the body is unable to efficiently eliminate estrogen, causing estrogens to build up and ultimately leading to estrogen dominance. On the other hand, if estrogen recycling (estrobolome) is too low, then this may lead to insufficient levels of estrogen in circulation.