seed cycling uses four specific seeds, two for each phase of your menstrual cycle. each one was chosen for its particular nutrient profile and how those nutrients interact with your hormones at different points in the month. here's a deep dive into what each seed brings to the practice.
flaxseeds (follicular phase, days 1 to 14)
flaxseeds are the star of the follicular phase. they're rich in lignans, plant compounds that bind to oestrogen receptors and support healthy oestrogen metabolism in the liver. when oestrogen is too high, a common issue in modern life due to environmental oestrogens, stress, and diet, flaxseed lignans help the body process and eliminate excess. flaxseeds also provide omega 3 fatty acids, which reduce inflammation and support cell membrane health.
how to eat them: ground flaxseeds are easier for the body to absorb than whole ones. add to smoothies, porridge, or yoghurt.
pumpkin seeds (follicular phase, days 1 to 14)
pumpkin seeds are one of the best dietary sources of zinc, a mineral that plays a dual role in the menstrual cycle. in the follicular phase, zinc supports healthy oestrogen levels. perhaps more importantly for cycle health, zinc accumulates during the follicular phase and is then used by the corpus luteum to produce progesterone in the luteal phase.
how to eat them: eat whole. sprinkle on salads, blend into smoothies, or eat as a snack.
sesame seeds (luteal phase, days 15 to 28)
sesame seeds contain sesamin, a lignan with anti androgenic properties, as well as zinc and healthy fats that support progesterone production in the luteal phase. they also provide calcium and magnesium, both of which support mood stability and reduce pms cramping.
how to eat them: whole or as tahini. stir into dressings, spreads, or add to porridge.
sunflower seeds (luteal phase, days 15 to 28)
sunflower seeds are high in vitamin e, a fat soluble antioxidant that has been studied specifically for its effects on pms, including reducing breast tenderness and mood symptoms. they also contain selenium, which is essential for thyroid function and for reducing the oxidative stress elevated in conditions like pcos.
how to eat them: whole, as seed butter, or blended into smoothies.
pre portioned for simplicity
sourcing four different types of seeds, keeping them fresh, and measuring them daily is the main friction point in seed cycling. phasebloom's seed cycling kit contains all four seeds, organic and pre portioned by phase, so you can focus on consistency rather than logistics.