Fireweed is a nutrient-dense leafy green vegetable rich in fiber, calcium, and manganese, offering exceptional micronutrient density with minimal calories.
Vitamins & minerals packed in relative to calories — the single biggest driver of the score.
How much protein it delivers, by absolute grams and per calorie.
Dietary fiber for gut health, satiety and steadier blood sugar.
Fat quality — unsaturated vs saturated, and trans-fat free.
Polyphenols, flavonoids and other beneficial plant compounds for this food group.
Low sugar with a high fiber-to-carb ratio scores best — gentler on blood sugar.
Fireweed (Epilobium angustifolium), also known as willowherb, is a wild edible plant traditionally consumed by Indigenous peoples of North America and Eurasia. It thrives in disturbed soils and recovering landscapes, making it an ecologically resilient food source. Nutritionally, fireweed is a micronutrient powerhouse: it delivers 429 mg of calcium per 100g (comparable to dairy), exceptional fiber content at 10.6g, and meaningful quantities of magnesium, potassium, and manganese—all minerals critical for bone health, metabolic regulation, and longevity. The manganese content (6.7 mg per 100g) is particularly notable, as this trace element supports connective tissue formation and antioxidant defense. Fireweed's low caloric density (103 kcal) combined with high nutrient concentration makes it ideal for nutrient-optimized diets. The plant contains polyphenolic compounds and has been used traditionally in herbal medicine for anti-inflammatory purposes. For longevity-focused nutrition, fireweed represents a high-micronutrient-density option that supports bone mineralization, metabolic health, and systemic inflammation management.
Fireweed's mineral density and fiber support metabolic health throughout the day; no time-dependent bioavailability constraints. Midday or with lunch optimizes mineral absorption when stomach acid is active.
The fiber content may enhance satiety if consumed with protein-rich foods; consider pairing with meals containing fat and protein to optimize micronutrient absorption and minimize potential digestive distress from high fiber intake in sensitive individuals.
