Hi Melissa,
Great question. Spirulina is a super nutrient-dense booster food and is also great for helping the body detoxify. That said, the jury is still out on whether “detox” foods like spirulina and practices like infrared saunas are safe while breastfeeding. To be cautious, I’d say avoid it or use it in small amounts while breastfeeding since there is some evidence showing toxins are released in breastmilk. You can always resume once you’re done breastfeeding, especially since spirulina isn’t essential for obtaining vitamins and minerals. Hope this helps!