What the research shows about cannabis and estrogen

Estrogen and the endocannabinoid system interact. In animal studies, estradiol has been shown to shift how the body responds to THC. 

Controlled human studies have not shown that higher estrogen reliably makes cannabis feel stronger. The popular claim that weed raises or lowers estrogen is also unsupported by human data, which points in different directions depending on the cannabinoid, tissue, and dose.

If hormones already make your response to cannabis less predictable, you should control your dosage and stick with low-dose formats to avoid unwanted effects.

Key points

• Animal studies suggest estrogen can boost the effects of THC, but similar effects haven’t been seen in human studies
• "Weed raises or lowers estrogen" is reductionistic, since effects vary by dose and tissue
• Cycle phase can't reliably predict how strong cannabis will feel
• Cannabis with HRT is barely studied, so leave dosing to a clinician

Does cannabis increase estrogen?

No study conclusively shows that cannabis raises or lowers circulating estrogen across the board. Different cannabinoids, tissues, and doses have produced different results, which is why a blanket answer misleads more than it helps.

A 2025 experiment on human granulosa cells (the ovarian cells that make estradiol) found no significant change in estradiol production after exposure to THC or CBD. A separate line of research in human placental tissue found that THC disrupted estrogen-signaling machinery, including aromatase activity. Placental biology shouldn't be stretched to describe hormones in a non-pregnant body.

Cannabis can interact with estrogen-related pathways in specific tissues, yet the popular "weed boosts your estrogen" headline isn't backed by human whole-body evidence.

What hormones does cannabis affect?

Cannabis interacts with the reproductive endocrine axis more clearly than it interacts with estrogen. THC influences signaling in the hypothalamus and pituitary, the control tower for sex hormones, instead of acting on estrogen directly.

An older controlled study found that smoking a THC-containing cigarette cut luteinizing hormone by roughly 30% during the luteal phase of the menstrual cycle. Luteinizing hormone helps regulate the ovaries, so a short-term dip signals an effect on the broader hormone cascade, not proof that estrogen itself moved.

How does estrogen interact with the endocannabinoid system?

Estrogen and the endocannabinoid system talk to each other. Research shows that estradiol can influence CB1 receptor activity, endocannabinoid levels such as anandamide, and the enzyme FAAH that breaks anandamide down.

Animal studies show effects are region-specific and endpoint-specific. In rats, estradiol has shifted anandamide signaling and CB1-linked behaviors, sometimes in opposite directions depending on the tissue.

Does estrogen make cannabis feel stronger?

Possibly for a few effects in animals, but human studies don't back it as a general rule. In rodents, estradiol has increased some THC effects, including pain relief, and estrous-cycle stage has altered THC responses and cannabinoid receptor measures.

Controlled human research is inconclusive. When researchers compared women in the early follicular phase against the late follicular phase, when estradiol runs much higher, most responses to 7.5 mg and 15 mg of oral THC did not differ significantly between the two groups. A related human study found that THC impaired inhibitory control regardless of a participant's circulating estradiol.

In rats, gonadal hormones changed how THC was processed, and estradiol raised the active metabolite 11-hydroxy-THC in gonadectomized males, which suggests hormone effects can affect metabolism. Human pharmacology also hints at sex differences, with women showing higher peak THC blood levels than men after the same dose in one study.

Does the menstrual cycle change how cannabis feels?

Current human evidence does not support using cycle phase or estrogen level to predict how strong THC will feel. That doesn't mean you won’t notice any differences. Progesterone shifts, sleep quality, food, tolerance, and dose all change alongside estrogen, so many variables work in tandem.

Your menstrual cycle might cause moodiness and physical symptoms that you want to manage with cannabis. Broader shifts in women's health have popularized CBD and THC products as ways to get through the roughest menstrual symptoms.

Can you use cannabis with HRT or during menopause?

Controlled research on cannabis alongside exogenous estrogen barely exists. The follicular-phase study mentioned earlier noted that it's unknown whether the same findings apply to people on hormone treatments, which covers menopausal hormone therapy and gender-affirming estrogen alike.

So there's no evidence-based rule that starting estrogen therapy will predictably change how much cannabis you should take. We recommend talking with your physician.

Surveys show that many people turn to low-dose cannabis for menopause-related symptoms such as sleep disruption and mood changes. Falling estrogen also tends to dampen desire, which is why many women use microdosed cannabis to increase libido.

Try nama microdosed products for women

Hormones add enough variability on their own, so control the one input you can measure. Precise milligram dosing beats the guesswork of smoking, where a single inhale can range from 1 to 5 mg depending on the flower.

nama products for comfort and connection through the month:

• Intimacy: Love gummies pair THC and CBD with aphrodisiac botanicals, and starting at half a gummy keeps first-timers in a gentle range.
• Whole-body comfort: The relief and comfort collection leans on higher-CBD formulas for cramps and physical tension that flare at predictable points in the cycle.
• Restful nights: Nighttime gummies help when hormonal shifts wreck your sleep, without the morning fog.
• Daily calm: Our relaxing products take the edge off mood swings without checking you out.

Further reading

The effects of THC on libido

Do edibles make you last longer in bed?

Best CBD gummies for menopause

Microdosing THC for anxiety

How to microdose weed

Resources

Craft, R. M., Haas, A. E., Wiley, J. L., Yu, Z., & Clowers, B. H. (2017). Gonadal hormone modulation of Δ9-tetrahydrocannabinol-induced antinociception and metabolism in female versus male rats. Pharmacology, Biochemistry and Behavior, 152, 36–43. https://doi.org/10.1016/j.pbb.2016.09.006 

Craft, R. M., & Leitl, M. D. (2008). Gonadal hormone modulation of the behavioral effects of Δ9-tetrahydrocannabinol in male and female rats. European Journal of Pharmacology, 578(1), 37–42. https://doi.org/10.1016/j.ejphar.2007.09.004 

González, S., Bisogno, T., Wenger, T., Manzanares, J., Milone, A., Berrendero, F., Di Marzo, V., Ramos, J. A., & Fernández-Ruiz, J. J. (2000). Sex steroid influence on cannabinoid CB1 receptor mRNA and endocannabinoid levels in the anterior pituitary gland. Biochemical and Biophysical Research Communications, 270(1), 260–266. https://doi.org/10.1006/bbrc.2000.2406 

Hill, M. N., Karacabeyli, E. S., & Gorzalka, B. B. (2007). Estrogen recruits the endocannabinoid system to modulate emotionality. Psychoneuroendocrinology, 32(4), 350–357. https://doi.org/10.1016/j.psyneuen.2007.02.003 

Kadhim, L., Paquette-Jager, S., & Landry, D. A. (2025). Cannabinoid exposure does not alter estradiol biosynthesis in human KGN granulosa cells. Reproductive Toxicology, 136, 108978. https://doi.org/10.1016/j.reprotox.2025.108978 

Maia, J., Almada, M., Midão, L., Fonseca, B. M., Braga, J., Gonçalves, D., Teixeira, N., & Correia-da-Silva, G. (2020). The cannabinoid delta-9-tetrahydrocannabinol disrupts estrogen signaling in human placenta. Toxicological Sciences, 177(2), 420–430. https://doi.org/10.1093/toxsci/kfaa110 

Mendelson, J. H., Mello, N. K., Ellingboe, J., Skupny, A. S., Lex, B. W., & Griffin, M. (1986). Marihuana smoking suppresses luteinizing hormone in women. Journal of Pharmacology and Experimental Therapeutics, 237(3), 862–866. 

Pabon, E., & de Wit, H. (2023). Effects of oral delta-9-tetrahydrocannabinol in women during the follicular phase of the menstrual cycle. Cannabis and Cannabinoid Research, 8(6), 1117–1125. https://doi.org/10.1089/can.2022.0045 

Pabon, E., & de Wit, H. (2023). Impaired inhibition after delta-9-tetrahydrocannabinol in women not related to circulating estradiol levels. Pharmacology, Biochemistry and Behavior, 225, 173547. https://doi.org/10.1016/j.pbb.2023.173547 

Wakley, A. A., McBride, A. A., Vaughn, L. K., & Craft, R. M. (2014). Cyclic ovarian hormone modulation of supraspinal Δ9-tetrahydrocannabinol-induced antinociception and cannabinoid receptor binding in the female rat. Pharmacology, Biochemistry and Behavior, 124, 269–277. https://doi.org/10.1016/j.pbb.2014.06.007  

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