Days 1–5
Menstrual
FasterProstaglandins high · estrogen and progesterone low
Prostaglandins released to shed the uterine lining also stimulate the bowel. Expect more frequent, looser stools and cramping, especially on days 1 and 2.
Shared by 1,400+ cliniciansThird-party testedVegan & allergen-freeMade in the USAWomen-owned
Hormone Balance Probiotic ES1
Period poop is real. Take control of your digestion all cycle long.
★★★★★"I noticed a marked difference by week two." · Kimberly C., Verified Purchase
$94.44 $104.94
Save $10.50 today
Recommended 90-day start. 3 bottles ship together · Free shipping · Cancel anytime
Looser and more urgent on your period, slow and bloated the week before. Your digestion changes across all 28 days because your hormones do. Hormone Balance ES1 is the daily probiotic built for the estrobolome, the gut bacteria that help regulate estrogen, so you can take control of the gut–hormone connection. Your gut supports your hormones. Your probiotic should, too.
- 7 clinically studied strains, 12 billion CFU, chosen for the gut–hormone axis
- Plus 265 mg Ahiflower® Omega 3·6·9 for a calm gut lining, no fish oil
- One small capsule a day. No hormones, no laxatives, no diuretics, no charcoal
Free shipping on subscriptions · Cancel anytime · Shared by 1,400+ clinicians including OB/GYNs
Shared by 1,400+ cliniciansThird-party testedVegan & allergen-freeMade in the USAWomen-owned
Solving The Problem You're Experiencing
Your gut changes with your cycle. Most women just aren't told why.
Urgent on day one, backed up by day twenty-one. You have tried cutting coffee, adding fiber and eating lighter around your period, and the pattern keeps coming back. That is because it follows your hormones, not your plate. If several of these sound familiar, this page is for you.
73%
of healthy women reported at least one GI symptom in the five days before or during their period.4
28%
reported diarrhea during their period, one of the two most common symptoms alongside abdominal pain.4
✓
Most common
Looser, more urgent trips to the bathroom on day one and two of your period
✓
Constipation and bloating in the week before your period
✓
Cramping that hits your gut as well as your uterus
✓
Gas and heaviness that build in the days after ovulation
✓
Digestion that is steady mid-cycle and swings at both ends
✓
Planning your first day around where the nearest bathroom is
✓
PMS, mood swings and cravings in the same window as the gut changes
✓
Afternoon energy dips that line up with the slow, bloated days
✓
A pattern that has become harder to predict in your late thirties or forties
The Simple Explanation
How period poop happens, in three steps.
1
Progesterone drops
When no pregnancy occurs, progesterone falls sharply in the last days of your cycle. The brake it held on gut muscle all through the second half of the month comes off.5
2
Prostaglandins surge
The uterine lining releases prostaglandins, hormone-like compounds that make the uterus contract so it can shed. They peak in the first one to two days of bleeding.6
3
Your bowel contracts too
The bowel sits right next to the uterus and responds to the same signal. Its muscle contracts faster and draws in more water, which means urgency, cramping and looser stools.4,6
Then the cycle turns. After ovulation, progesterone rises again and relaxes the gut wall, so the same gut that rushed on your period slows down, dries out and bloats in the luteal phase.5 Period poop and premenstrual constipation are two ends of one hormonal rhythm.
Your Gut, Day By Day
How fast your gut moves across a 28-day cycle.
Gut transit speed
Estrogen
Progesterone
Prostaglandins
Illustrative curves for a textbook 28-day cycle. Hormone lines show relative rise and fall, not measured levels. Cycles vary in length and intensity from person to person.
Days 6–13
Follicular
SteadyEstrogen rising · progesterone low
With prostaglandins settled and progesterone low, nothing is strongly pushing or braking gut muscle. For many women this is the most regular stretch of the month.
Around day 14
Ovulation
VariableEstrogen peaks · LH surges
Estrogen peaks and then drops as an egg is released. Some women notice short-lived bloating or pelvic discomfort that can be mistaken for gut pain.
Days 15–28
Luteal
SlowerProgesterone peaks near day 21
Progesterone relaxes smooth muscle, including the gut wall. Food moves more slowly, stool dries out, and constipation and bloating become more common.5
The Estrobolome
Your gut doesn't just react to estrogen. It helps regulate it.
The estrobolome is the collection of gut bacteria that metabolize estrogen. Your liver packages used estrogen so it can leave the body in stool. Some gut bacteria make an enzyme, β-glucuronidase, that unpacks it again, so it is reabsorbed instead of eliminated.1,2
That makes the relationship two-way. Your hormones change how your gut moves, and your gut microbiome influences how much estrogen stays in circulation.3 When the estrobolome is balanced, the monthly swing is smoother, and so is your digestion across it.
The Gut–Hormone Connection
Your gut supports your hormones. Your probiotic should, too.
Most probiotics were designed for digestion alone. Period poop and premenstrual constipation sit where your gut and your hormones meet, so the probiotic that helps you take control of them has to be built for both.
Why Hormone Balance
Seven strains chosen for the gut–hormone axis. Nothing else in it.
Hormone Balance ES1 is the daily probiotic built around the estrobolome, the gut bacteria that decide how much used estrogen is cleared and how much is reabsorbed. When that system is in balance, the monthly estrogen swing is smaller, digestion stays more regular and the gut lining stays calm. That is the gut–hormone connection, and supporting it every day is how you take control of your digestion all cycle long.
12 BILLION CFU
The 7-strain probiotic complex
Seven clinically studied strains selected for women's gut–hormone health, not a generic digestive blend repackaged for women. Lactobacillus species in particular have been studied for their effect on bloating, abdominal discomfort and regularity in controlled trials.7
L. gasseri KABP™-064
L. rhamnosus IMC-501®
L. rhamnosus SP1
L. paracasei IMC-502®
L. brevis KABP™-052
P. acidilactici KABP™-021
L. plantarum KABP™-051
265 MG
Ahiflower® Omega 3·6·9
A plant-based seed oil rich in SDA, GLA and ALA, included to support a healthy inflammatory response in the gut lining. An irritated gut wall is a reactive gut wall, and a calm one handles the monthly hormonal swing with less drama.
No fish, no fillers, no aftertaste. Citrus-scented capsules, one a day, with or without food.
ZeroLaxatives
ZeroDiuretics
ZeroSynthetic hormones
ZeroTop-9 allergens
Formulated for every life stage: cycling years, perimenopause and beyond. Cycle-driven digestion often becomes harder to predict in the late thirties and forties as hormones fluctuate more, which is exactly when the estrobolome's job matters most.
Watch
A closer look at Hormone Balance ES1.
Verified Reviews
What women say about their digestion.
4.5
★★★★★
★★★★★
Game changer for my Bloating & PMS Symptoms
"I've struggled for years with constant bloating and horrible PMS symptoms—mood swings, discomfort, and feeling completely off hormonally. I decided to give this a try, and I'm so glad I did.
Since taking this probiotic, I've noticed a huge improvement in my bloating, my mood is much more balanced, and overall my hormones feel more regulated. My PMS symptoms are significantly more manageable, which honestly feels life-changing.
I take it first thing in the morning on an empty stomach, before I drink my morning tea, and it's been very gentle and easy to stick to. I'm already on my 3rd bottle, and that alone says a lot.
This is now a non-negotiable part of my daily routine. I highly recommend!"
LaCretia Ward · Verified Purchase · December 18, 2025 · 8 people found this helpful
★★★★★
Great supplement
"I waited until I finished a bottle to write my review. I am very happy with this supplement. Pros: Way less bloating than when I started. I noticed a marked difference by week 2."
Kimberly Collins · Verified Purchase · April 25, 2026
★★★★★
The best so far
"It works for me it ease my bloating it curves my cravings I go out regularly my period comes on time its value for ur money"
Sasha · Verified Purchase · July 17, 2026 · 8 people found this helpful
Why Consistency Matters
Your gut responds first. Your period is the real test.
A probiotic works by establishing itself in your gut, and that is dose- and time-dependent. Period poop adds a second clock on top: your cycle. You cannot judge a cycle-driven pattern in less than a cycle. Here is the arc most women describe.
Weeks 1–2
Digestion settles first
The gut is the fastest-responding piece. Less gas, more regular days and a calmer stomach after meals. This is the window Kimberly describes in her review.
Weeks 3–6
Your first period on it
One to two cycles in is where the ends of the month change: less backed-up in the week before, and first days that feel less urgent. The first full cycle is the real test.
Weeks 7–12
The compounding window
By the third cycle the pattern is usually clear. Digestion that used to swing at both ends of the month feels steadier and more predictable, and you plan less of your life around it.
Consistency beats intensity. One capsule, every day, for three cycles. Missing a day will not undo your progress, but starting and stopping means you never get past the first cycle, which is the one that tells you the least. That is why the recommended starting point is 90 days.
Proof
1,632 clinicians, including OB/GYNs, share it with patients.
"As an Integrative Reproductive Endocrinologist, I see the profound impact hormones have on people's lives every day. I am so excited there is now a probiotic that focuses on the foundational role the gut microbiome has on hormone regulation."
Dr. Lauren Rubal
Reproductive Endocrinologist
"So exciting to have an everyday probiotic that actually supports women's health. The gut has endocrine inputs and outputs that regulate so much, from menstrual cycles and weight to immune function and mood."
Dr. Francie Broghammer
Psychiatrist
Your Starting Point
Start with 90 days. Three cycles is how long it takes to judge it.
One capsule a day, 12 billion CFU, 265 mg Ahiflower®. Three bottles ship together so you never run out mid-cycle, and 15% off your first order applies automatically, no code to remember.
Recommended · 90 Days
Save $10.50 today · free shipping
3-month supply
All 3 bottles ship together
$94.44
today · was $104.94
- Three full cycles, the window it takes to judge it
- Never run out mid-cycle
- Free shipping, every order
- Skip, change frequency or cancel anytime
Try it without the risk
If Hormone Balance isn't right for you, contact us at hello@dailynouri.com within 30 days of delivery and we'll send a prepaid return label and refund you in full. Subscriptions have no minimum. Change your delivery frequency, skip a month, or cancel in two clicks from your account.
Before You Buy
Questions women ask us about period poop
Why do I poop more on my period?+
Prostaglandins. Your uterine lining releases them to help the uterus contract and shed, and the bowel next door responds to the same signal. Gut muscle contracts faster and draws in more water, so stools are more frequent, looser and more urgent, especially on days one and two.
Why am I constipated before my period?+
Progesterone rises after ovulation and relaxes smooth muscle, including the gut wall. Food moves more slowly, more water is absorbed and stool dries out, which is why constipation, gas and bloating are most common in the week or two before your period.
Is period poop normal?+
Yes. In one study, 73% of healthy women reported at least one GI symptom in the days before or during their period. Severe pain, blood in your stool, or symptoms that disrupt daily life are not typical. Conditions such as endometriosis and IBS can flare with the cycle, so talk to your clinician if that sounds familiar.
How can a probiotic help with cycle-related digestion?+
Hormone Balance ES1 supports the estrobolome, the gut bacteria that help regulate how much estrogen your body clears, alongside a balanced microbiome and a calm gut lining. It does not stop your gut from responding to your cycle. It supports the system underneath, so the swings at both ends of the month are easier to live with.
How quickly will I notice a difference?+
Digestive changes often come first, within the first two weeks. Changes around your period take at least one full cycle to show, because you have to go through a period to see the difference. Judge it at three cycles.
Is this a laxative or an anti-diarrheal?+
Neither. There are no laxatives, stool softeners, anti-diarrheals, fibre bulking agents or diuretics in it. Those act on one symptom for a day. Hormone Balance works on the bacteria that sit between your gut and your hormones.
Will it make me gassy at first?+
Some women notice a few days of adjustment as the strains establish themselves, usually mild and gone within the first week. Taking it at the same time each day keeps it smooth. If you are sensitive, start with it at breakfast.
I'm in perimenopause and my digestion has changed. Is this for me?+
Yes. As cycles become irregular in the late thirties and forties, the hormonal swing gets bigger and less predictable, and gut changes often show up or worsen. The estrobolome's role matters more in that window, not less.
Do I need to refrigerate it?+
No. Store it at room temperature, out of direct sunlight. Take one capsule daily with water, with or without food, whatever makes it easiest to remember.
Is it safe with my medication, or if I'm pregnant?+
It's hormone-free, vegan, third-party tested, and free from nine major allergens. That said, if you're pregnant, breastfeeding, or taking medication, talk to your healthcare provider before starting, as you should with any new supplement.
What if it doesn't work for me?+
Email hello@dailynouri.com within 30 days of delivery and we'll arrange a return and full refund. We'd rather you tell us it didn't work than quietly give up on it.
Hormone Balance Probiotic ES1
Take control of your digestion.
One capsule a day, all cycle long.
Seven clinically studied strains built for the estrobolome. 12 billion CFU. Plant-based Ahiflower® Omega 3·6·9. No laxatives, no diuretics, no hormones.
4.5★ from 1,400+ reviews
Shared by 1,400+ clinicians
Third-party tested
30-day returns
$94.44 today, was $104.94 · Save $10.50 · Free shipping · Cancel anytime
References
- Plottel CS, Blaser MJ. Microbiome and Malignancy. Cell Host & Microbe. 2011;10(4):324–335.
- Ervin SM, Li H, Lim L, et al. Gut microbial β-glucuronidases reactivate estrogens as components of the estrobolome. Journal of Biological Chemistry. 2019;294(49):18586–18599.
- Baker JM, Al-Nakkash L, Herbst-Kralovetz MM. Estrogen-gut microbiome axis: Physiological and clinical implications. Maturitas. 2017;103:45–53.
- Bernstein MT, Graff LA, Avery L, et al. Gastrointestinal symptoms before and during menses in healthy women. BMC Women's Health. 2014;14:14.
- Wald A, Van Thiel DH, Hoechstetter L, et al. Gastrointestinal transit: the effect of the menstrual cycle. Gastroenterology. 1981;80(6):1497–1500.
- Heitkemper MM, Chang L. Do fluctuations in ovarian hormones affect gastrointestinal symptoms in women with irritable bowel syndrome? Gender Medicine. 2009;6(Suppl 2):152–167.
- Ringel-Kulka T, Palsson OS, Maier D, et al. Probiotic bacteria Lactobacillus acidophilus NCFM and Bifidobacterium lactis Bi-07 versus placebo for the symptoms of bloating in patients with functional bowel disorders. Journal of Clinical Gastroenterology. 2011;45(6):518–525.
Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Cited research describes studies of mechanisms and of individual probiotic strains, and is not a study of this finished product; probiotic effects are strain-specific. Individual results vary. Reviews reflect the experiences of individual customers and are not a guarantee of outcome. Always consult a qualified healthcare provider before starting a new supplement, especially if you are pregnant, breastfeeding, taking medication, or managing a medical condition.