What is seed cycling?

Bottom lineSeed cycling is eating flaxseed and pumpkin seeds during the first half of your cycle and sesame and sunflower seeds during the second half, with the aim of supporting the hormones of each phase; it is a low-risk food habit whose hormone-balancing claims are not well proven.

Seed cycling is a food-based wellness practice that involves eating specific seeds during specific halves of your menstrual cycle, with the idea of supporting the hormones that dominate each half.

The basic idea

Your cycle is split into two phases at ovulation:

• Follicular phase - the first half, from your period until ovulation, led by estrogen.
• Luteal phase - the second half, from ovulation until your next period, led by progesterone.

The standard protocol is:

• Follicular phase: 1 tablespoon of ground flaxseed + 1 tablespoon of pumpkin seeds daily.
• Luteal phase: 1 tablespoon of sesame seeds + 1 tablespoon of sunflower seeds daily.

The theory

These seeds contain lignans (a type of phytoestrogen - a plant compound with a weak, estrogen-like effect) plus minerals like zinc, magnesium, and selenium. The claim is that timing them to each phase gently supports estrogen in the first half and progesterone in the second.

It is worth knowing that the evidence for seed cycling as a hormone treatment is limited, though the seeds themselves are genuinely nutritious. For the full picture, see does seed cycling work and our guide to seed cycling and the evidence.

This is general information, not medical advice.