If you menstruate and are curious about psychedelics, there is something surprisingly absent from much of the conversation: your cycle.
For decades, women’s bodies have been treated as inconvenient variables in medical research. Hormonal fluctuations complicate data, so researchers have historically excluded or inadequately studied them. Psychedelic research has inherited some of the same blind spots (Cohen & Blest-Hopley, 2025).
Fortunately, this is beginning to change.
Hystelica, an organization dedicated specifically to advancing psychedelic science for women, has been drawing attention to the relationship between female hormones and psychedelic medicines. Their researchers argue that fluctuations in estrogen and progesterone may influence the very neurotransmitter systems psychedelics act upon, including serotonin, dopamine, glutamate and GABA (Cohen & Blest-Hopley, 2025).
In other words, the same dose of a psychedelic medicine may affect you differently depending on where you are in your cycle
This is still a very young area of research, and I want to be careful not to turn emerging hypotheses into rules. Even as the research grows, there is unlikely to be a perfect roadmap for how or when someone should work with psychedelics across their cycle. Menstruation is not only a hormonal event. It can also be a time of heightened sensitivity, inwardness, emotional processing and release, and how that is experienced will be deeply individual.
What the research can do is help us better understand what may be happening in our bodies, while leaving room for the wisdom and complexity of our own individual experience
And perhaps that is the deeper invitation here. Working with psychedelics asks us to pay attention to the body, to cycles, to our relationship with the living world, and to forms of knowledge that Western medicine has often overlooked. For me, taking the menstruating body seriously is part of a much bigger conversation about restoring respect for the Feminine and remembering that our bodies are not separate from Nature, but expressions of it.
As a microdosing guide, this is the part that interests me most. Microdosing gives us a particularly interesting opportunity to practice that kind of attention over time.
Here are five things I think are worth knowing.
1. Your hormones may change how a psychedelic feels
Classic psychedelics such as psilocybin and LSD exert much of their psychedelic activity through the serotonin 2A receptor. The ovarian hormones estradiol (a form of estrogen) and progesterone also interact with serotonin, a neurotransmitter involved in mood, cognition and perception, as well as with other neurotransmitter systems (Cohen & Blest-Hopley, 2025).
Hystelica researchers Dr. Grace Blest-Hopley and Dr. Zahira Ziva Cohen argue that hormonal fluctuations across the menstrual cycle could therefore affect both the subjective experience and potentially the therapeutic effects of psychedelics.
Their paper puts it simply: “female hormonal variability may play a pivotal role in psychedelic experiences” (Cohen & Blest-Hopley, 2025).
That doesn't mean we know exactly what happens at every point in the cycle. We don't. But it does give us a compelling reason to stop thinking about a psychedelic dose as something that acts on the same body under the same conditions every time.
During the follicular phase, estrogen generally rises toward ovulation. After ovulation, progesterone becomes more prominent before both hormones fall in the late luteal phase leading into menstruation. Alongside those hormonal shifts can come very real changes in mood, energy, sensitivity, sleep, cognition and emotional regulation.
For someone who already notices significant differences across their cycle, it makes sense to consider those changes part of their psychedelic set and setting too.
2. There probably isn't a universally “best” time in your cycle to work with psychedelics
You may come across recommendations to journey during the follicular phase, particularly the week approaching ovulation, when estrogen is rising and many people experience greater energy, sociability and emotional resilience.
There are reasonable biological hypotheses behind this. But I would be cautious about turning them into prescriptions.
We simply don't have the clinical evidence yet to declare one phase of the menstrual cycle the optimal psychedelic window (Cohen & Blest-Hopley, 2025).
What we can say is that timing may matter.
If you reliably experience PMS, PMDD, migraines, insomnia, anxiety or emotional sensitivity during a particular part of your cycle, that is meaningful information when deciding when and how to work with a psychedelic. For some people, a phase when they feel grounded, open and well-resourced may feel like the right time for a deeper experience. For others, the heightened sensitivity of the luteal or premenstrual phase may offer an opportunity to work with emotions, patterns or material that tends to come closer to the surface during that time. Some practitioners intentionally work with this window for that reason, although greater sensitivity can also mean a more intense experience and may call for additional care and support.
This is where I think body literacy becomes more useful than another universal protocol. The question isn't simply which phase is “best,” but what is happening in your body and psyche at a particular point in your cycle, and how you want to meet what is there.
3. Microdosing gives us a particularly interesting opportunity to notice these patterns
This is one of the reasons I find the intersection between microdosing and menstrual health so interesting.
A psychedelic journey might happen once or a handful of times. A microdosing practice usually unfolds over weeks or months, which means it naturally moves through different phases of the menstrual cycle.
Instead of viewing that variability as something interfering with the process, we can get curious about it.
Perhaps a microdose of psilocybin feels supportive during one part of the month and too stimulating during another. Perhaps you notice more emotional material surfacing premenstrually. Perhaps the dose feels almost imperceptible around ovulation. Perhaps you notice no relationship whatsoever.
All of that is information.
People who work with psychedelics have long noticed that these medicines can feel different depending on what is happening in the body, even if Western psychedelic research is only beginning to study some of these patterns directly. Hystelica and King’s College London are currently studying psychedelic use in women, including microdosing and menopausal symptoms, and researchers at the University of Auckland are studying low-dose psilocybin at different phases of the menstrual cycle (Hystelica, 2026; University of Auckland, n.d.).
I’m excited to see this research growing, not because science will give us a definitive roadmap, but because it can help us better understand what many people have already been noticing in their own bodies and experiences.
In my own work, I prefer an approach to microdosing that leaves room for observation rather than rigidly following a protocol because someone on the internet said it was the “best” one. Tracking your dose alongside cycle day, mood, sleep, energy, physical symptoms and emotional sensitivity can begin to reveal your own patterns over time.
Over time, you may begin to notice patterns in how your body responds to the medicine at different points in your cycle. But patterns aren't formulas. The same microdose can feel different from one day to the next, shaped by what is happening in your body and psyche. For me, that unpredictability is part of working with psychedelics as teachers rather than simply substances to be optimized.
4. Your menstrual cycle can be part of set and setting
Most people who spend time around psychedelics eventually encounter the concept of set and setting: the understanding that a psychedelic experience is shaped not only by the substance, but by the person taking it and the environment surrounding them.
We tend to think of “set” psychologically. What is my mood? What am I afraid of? What are my intentions? What is happening in my life?
But we are embodied creatures.
Hormones, sleep, hunger, illness, nervous-system activation, menstrual pain and physical sensitivity are part of set too.
Cohen and Blest-Hopley go a step further and argue that menstrual cycle and hormonal status should be considered as part of psychedelic preparation and informed consent (2025). I think this matters. If where you are in your cycle may affect the intensity of an experience, that is something worth considering beforehand, alongside the other things we already think about when preparing for psychedelic work.
This is particularly important if your cycle includes periods of significant emotional or physical distress. More intensity is not necessarily more therapeutic. Sometimes the wisest decision is to take less, change the timing, seek additional support or not take the medicine at all.
Learning to work with psychedelics can also mean learning when not to work with them.
5. The deeper invitation may be to come back into relationship with your body
This is where the conversation becomes more interesting to me than hormones alone.
Science can help us understand estrogen, progesterone, serotonin receptors and pharmacology, and I am grateful that researchers are finally asking these questions.
But psychedelics also sit within histories much older than Western psychedelic science. Hystelica's researchers themselves point out that menstrual cycles have been considered within longstanding Indigenous psychedelic practices, even while modern research has largely failed to account for them (Cohen & Blest-Hopley, 2025).
I think we need to approach this territory carefully. There is no single “Indigenous perspective” on menstruation or psychedelics, and traditions involving mushrooms, peyote, ayahuasca and other medicines belong to particular peoples, places and lineages. We shouldn't flatten them into a generalized idea of feminine wisdom.
But there is something worth noticing in the contrast.
Western medicine has often approached the body by isolating variables: brain from body, mind from environment, human from nature, reproductive health from mental health. Psychedelics have an interesting way of making those divisions harder to maintain.
Research has repeatedly found associations between psychedelic experiences and increased nature connectedness. In one prospective study, increases in nature relatedness remained measurable two years after a psychedelic experience and were associated with improvements in psychological wellbeing (Kettner et al., 2019). Other research has found a particularly strong relationship between psilocybin use and nature relatedness (Forstmann et al., 2023).
That matters to me.
Because perhaps one of the possibilities psychedelics offer is not simply another way to modify our brains, but another way to understand ourselves.
For people who menstruate, that might include remembering that we are cyclical organisms living inside a cyclical world.
There are seasons of growth and outward movement and seasons of withdrawal. There are periods of greater energy and periods asking for rest. There are tides, migrations, moons, births, deaths, decomposition and renewal. Our bodies are not separate from that living world.
And this is where I find myself interested in what we might call feminine ways of knowing. I don't mean that intuition, embodiment, relationship, reciprocity or cyclical awareness belong exclusively to women. They don't. I mean qualities historically associated with the Feminine that have often been devalued by cultures that privilege productivity, rationality, individualism and control.
Psychedelics have the potential to bring us back into relationship with aspects of ourselves that Western medicine has often ignored: the body, the psyche, spiritual life, our relationships with one another, and our relationship with the living world.
In that sense, I wonder if their potential for people who menstruate extends beyond treating symptoms.
Perhaps they also offer an opportunity to listen differently.
A different way to approach microdosing
If you're considering microdosing, you don't need to have your hormones tested or become an expert in reproductive endocrinology before you begin.
But I do think it is worth getting curious about the body you're bringing to the practice.
Track your cycle if you menstruate. Notice your energy. Notice your mood. Notice when you feel inward and when you feel expansive. Pay attention to whether the same dose feels different throughout the month. Keep notes rather than assuming every uncomfortable day means you need more medicine or every good day means you've found the perfect protocol.
And give yourself permission to adjust.
One of the things I hope to offer people through guided microdosing is precisely this kind of relationship with the practice. Rather than handing someone a rigid dosing schedule, I'm much more interested in helping them learn how to pay attention: to the medicine, to their nervous system, to their emotional life, to their body and to the wider context in which healing is taking place.
There is still so much we don't know about psychedelics and the menstrual cycle. The research is finally beginning to catch up.
In the meantime, perhaps the most useful place to begin is an ancient one:
Pay attention to your body. It may already be telling you more than you think.