How Much Protein Is in Seeds? A Realistic Look at Plant Protein per Spoonful

Seeds are often called protein-rich, and compared with many plant foods they are. But a tablespoon of seeds is a small serving, so the real contribution depends on how much you eat. Knowing the typical numbers helps you plan meals without exaggeration.

Rough protein per serving

These are approximate figures, and brands vary. Three tablespoons (30 grams) of hemp hearts give about 9 to 10 grams of protein. An ounce (28 grams) of pumpkin seeds gives around 7 grams. An ounce of sunflower kernels gives 5 to 6 grams. Two tablespoons of chia give 4 to 5 grams, and two tablespoons of ground flax about 2.5 to 3 grams. Sesame seeds provide around 1.5 grams per tablespoon, and cooked quinoa about 8 grams per cup.

Is seed protein complete?

Proteins are made of amino acids, and nine of these are essential, so we must eat them. Some plant proteins are low in one or two of them. Quinoa and hemp are often described as having all nine essential amino acids, though hemp is lower in lysine. Many other seeds are lower in lysine, which beans and lentils supply well. You do not need to combine foods at every meal. Eating a variety of plant foods across the day covers your needs.

How much protein do people need?

The standard guideline for most adults is about 0.8 grams of protein per kilogram of body weight per day, so around 55 to 65 grams for many people. Older adults, athletes and people recovering from illness may need more, and a dietitian can advise on that. Seeds can add a helpful 5 to 15 grams to a day, but they work best alongside beans, lentils, tofu, dairy, eggs, grains or other protein foods.

Easy ways to bump up protein

Stir hemp hearts into oatmeal or yogurt. Blend pumpkin seeds into a smoothie. Sprinkle sunflower kernels on a salad with chickpeas. Make a quinoa bowl with beans and roasted vegetables. Use seed butters, like tahini or sunflower butter, on toast. Add a seed powder to a shake after a workout. Pair these with a source of vitamin C and fiber-rich vegetables for balanced meals.

Calories to keep in mind

Seeds are also dense in healthy fats, so the calories add up. An ounce is roughly 150 to 180 calories. That is fine if you eat them in place of other foods, but it is worth keeping in mind if you are watching your weight.

Who should check first?

People with kidney disease are often advised to watch their protein, phosphorus and potassium intake, and seeds contain all three, so ask your doctor or dietitian before adding more. People on blood thinners, blood pressure medicine or diabetes medicine should mention a daily seed habit to a pharmacist. Seed allergies exist, and pregnant or breastfeeding women should check with their healthcare provider before making big changes.

This article is general information, not medical advice.