Herbs with Notable Protein Levels
Certain herbs pack more protein than expected for leafy plants, often 20-30% of their dry weight. These figures come from USDA nutritional data and botanical analyses, measured per 100g dried herb. They're useful in diets, teas, or supplements, though portions are small due to low calorie density.
Spirulina (Cyanobacteria, Often Called an Herb)
Dried spirulina contains 57-70g protein per 100g, making it one of the richest plant sources. It's complete protein with all essential amino acids. Used in smoothies or tablets; a 7g serving delivers about 4g protein.[1]
Dried Alfalfa (Medicago sativa)
Around 23g protein per 100g dried leaves. Popular in teas for its nutrient density; sprouts offer less (4g per 100g fresh). High in vitamins alongside protein.[2]
Dried Nettle Leaves (Urtica dioica)
Provides 25-42g protein per 100g dried, depending on variety. Eaten cooked to remove sting; common in soups or as tea. Rich in iron and minerals too.[3]
Dried Moringa Leaves (Moringa oleifera)
About 27g protein per 100g dried powder. Leaves are eaten fresh, dried, or powdered; a tablespoon (7g) yields 2g protein. Widely grown in tropics.[4]
Dried Parsley (Petroselinum crispum)
Holds 26g protein per 100g dried. Fresh parsley has just 3g per 100g, so drying concentrates it. Used as garnish or seasoning.[5]
Why Protein Varies So Much
Protein content spikes in dried forms because water (90%+ in fresh herbs) is removed. Fresh equivalents are tiny—e.g., 100g fresh nettle yields under 5g protein. Soil, harvest time, and processing affect levels by 10-20%.[6]
How to Use Them for Protein Boost
Add powders to shakes (spirulina/moringa: 10-20g per scoop), brew strong teas (nettle/alfalfa), or mix into salads/pestos. They complement legumes or nuts but won't replace meat alone due to volume needed.
Potential Downsides and Limits
High oxalate in nettle/alfalfa can bind minerals; cook to reduce. Spirulina risks contamination if poorly sourced—choose tested brands. Not ideal for allergies (e.g., moringa pollen).[7] Always verify with lab-tested products.
[1]: USDA FoodData Central, Spirulina (dried). https://fdc.nal.usda.gov/fdc-app.html#/food-details/170556/nutrients
[2]: USDA, Alfalfa (dried). https://fdc.nal.usda.gov/fdc-app.html#/food-details/169141/nutrients
[3]: Journal of Agricultural and Food Chemistry, "Protein Content in Stinging Nettle," 2014. https://pubs.acs.org/doi/10.1021/jf501863p
[4]: USDA, Moringa (dried leaves). https://fdc.nal.usda.gov/fdc-app.html#/food-details/170465/nutrients
[5]: USDA, Parsley (dried). https://fdc.nal.usda.gov/fdc-app.html#/food-details/170416/nutrients
[6]: Phytochemistry Reviews, "Nutritional Variability in Herbs," 2018. https://link.springer.com/article/10.1007/s11101-017-9534-5
[7]: NIH Office of Dietary Supplements, Herbal Supplement Safety. https://ods.od.nih.gov/factsheets/Herbals-HealthProfessional/