One number makes seeds look almost unbelievable: hulled hemp and pumpkin seeds are around 30 grams of protein per 100 grams, close to cooked chicken breast. The number is real, but the comparison changes as soon as you stop imagining 100 grams and picture a spoonful or handful.
A normal seed serving is closer to an ounce, so the useful distinction is between protein concentration by weight and protein in the amount people actually add to a meal.
Protein per 100 grams and per one-ounce serving
| Seed | Protein/100 g | Protein/1 oz |
|---|---|---|
| Hulled hemp | 31.6 g | 8.8 g |
| Pumpkin kernels | 30.2 g | 8.5 g |
| Sunflower kernels | 20.8 g | 5.8 g |
| Flaxseed | 18.3 g | 5.1 g |
| Sesame | 17.7 g | 5.0 g |
| Chia | 16.5 g | 4.6 g |
The ranking has one clear break. Hemp and pumpkin form a top group near 8.5–9 g per ounce; the remaining seeds cluster around 4.5–6 g. That first gap is meaningful. Within the second group, fiber, fat profile and culinary use often tell you more than the exact protein position.
Hemp and pumpkin genuinely stand out, but they still act like additions
Hulled hemp provides 31.6 g protein/100 g and pumpkin seeds 30.2 g. One ounce supplies about 8.8 and 8.5 g protein, a substantial amount for a small topping or snack.
Chicken shows why serving context still matters. A 5-ounce / 142 g cooked chicken breast provides about 44 g protein; an ounce of hemp provides about 8.8 g. Their concentration by weight is similar, but they do not occupy the same role or volume in a meal.
Among the rest, other nutrients explain the differences better
Sunflower provides about 5.8 g protein per ounce, flax 5.1 g, sesame 5.0 g and chia 4.6 g. The serving-level protein gap among these four is small.
Chia contains roughly 34 g fiber/100 g and flax around 27 g. In a 20 g serving, chia provides about 3.3 g protein and 6.8 g fiber; flax about 3.7 g protein and 5.4 g fiber. At that amount, fiber may be the more distinctive feature. Sunflower is notable for vitamin E and copper, while sesame contributes minerals and is the base of tahini.
The protein concentration comes with substantial energy
Most seeds exceed 500 calories/100 g because they are rich in fat. Hemp is around 550 calories with 31.6 g protein, compared with cooked chicken breast at about 165 calories with 31 g.
Nearly identical protein by weight, more than three times the energy. That does not make hemp a worse food; it reflects the unsaturated fat, minerals and other nutrients that come with it.
Where seeds fit best in a meal
One ounce can add roughly 5–9 g protein to oatmeal, yogurt, salads, sauces or a legume-based meal. That is where seeds are especially useful: they raise the total without needing to become the centerpiece.
If the goal is a 25–30 g protein meal, it is usually more practical to combine that serving of seeds with yogurt, soy foods, beans, eggs or another main protein source than to keep increasing the seed portion indefinitely.
The useful takeaway
Hemp and pumpkin seeds really do separate themselves on protein. Sunflower, flax, sesame and chia are more tightly grouped and are better distinguished by fiber, fats and micronutrients. Seeds are highly concentrated by weight, but in normal servings their natural role is usually to add protein rather than carry the entire meal alone.
Sources
- USDA FoodData Central — Seed composition.