How Hemp Hearts Deliver What Most Plant Seeds Cannot
Hulled hemp seeds (FDC 170148) provide 31.56g protein per 100g — with all nine essential amino acids present. This makes hemp one of the rare plant-based complete protein sources alongside quinoa and soy, and distinguishes it from most seeds that are limited in lysine or tryptophan [1].
Three tablespoons (30g) — a typical serving — deliver 9.5g protein for 166 kcal. The protein is approximately 65% edestin and 35% albumin — both highly digestible globular proteins. Studies estimate hemp protein digestibility at 86-92%, which is lower than whey (99%) or egg (97%) but higher than many other plant proteins [2].
The amino acid profile per 100g includes: leucine ~2.2g, isoleucine ~1.3g, valine ~1.6g (the three BCAAs), along with lysine ~1.3g (adequate but lower than animal sources). For muscle protein synthesis tracking, hemp's BCAA content is about 60% that of whey protein per gram of protein, but at 31.56g protein per 100g, the absolute amounts are substantial [3].
Omega-6 to Omega-3 in a 3:1 Ratio: The Fatty Acid Balance That
Hemp seeds contain 48.75g fat per 100g — of which approximately 80% is polyunsaturated. The omega-6 (linoleic acid): omega-3 (alpha-linolenic acid) ratio is approximately 3:1 — roughly 27.4g omega-6 and 8.7g omega-3 per 100g [2].
This 3:1 ratio is considered favorable by nutritional researchers. For comparison: sunflower seeds are ~65:1, almonds are ~2000:1 (virtually no omega-3), and even walnuts are ~4.2:1. Among seeds and nuts, hemp has one of the most balanced omega profiles [3].
Three tablespoons (30g) provide approximately 2.6g ALA (omega-3) — exceeding the adequate intake of 1.1-1.6g/day for adults. However, conversion of ALA to the longer-chain EPA and DHA is limited (approximately 5-10% and 1-5% respectively), so hemp seeds do not replace marine omega-3 sources for tracking long-chain omega-3 intake [2].
The Mineral Profile That Rivals Any Supplement
Hemp seeds deliver 700mg magnesium per 100g (167% DV) — the highest of any common seed, exceeding even pumpkin seeds (592mg). Three tablespoons provide 210mg magnesium (50% DV) — more than most mineral supplements deliver in a single dose [1].
Phosphorus: 1650mg per 100g (132% DV) — exceeding every other seed except dried watermelon seeds. Zinc: 9.9mg per 100g (90% DV) — three tablespoons provide 3.0mg zinc (27% DV). Iron: 7.95mg per 100g (44% DV) — non-heme form, with absorption enhanced by pairing with vitamin C [1].
Manganese: 7.6mg per 100g (330% DV) and copper: 1.6mg per 100g (178% DV) — both extraordinarily high. Potassium: 1200mg per 100g (26% DV). A 30g serving covers meaningful portions of 7 different mineral DVs simultaneously — a density unmatched by most multivitamin formulations [1].
3 Tablespoons on Yogurt or Oatmeal: How 30g of Hemp Hearts
Plain Greek yogurt (170g, 100 kcal, 17g protein) with 3 tablespoons of hemp hearts (30g): 266 kcal, 26.5g protein, 210mg magnesium, and 208mg calcium (187mg from yogurt + 21mg from hemp). The hemp seeds nearly equal the yogurt's protein while adding mineral diversity the yogurt lacks [1].
On oatmeal (40g dry oats, 150 kcal, 5g protein): 316 kcal, 14.5g protein, 210mg magnesium, 2.4g iron, 2.6g omega-3. The hemp seeds triple the protein and add substantial magnesium and omega-3 beyond what oats provide (oats: 55mg magnesium, 0g omega-3 per 40g serving) [1].
In a smoothie (banana + milk + 30g hemp hearts): the hemp seeds add 166 kcal, 9.5g protein, and 2.6g omega-3 — without changing the texture significantly. Unlike chia or flax, hemp seeds blend smooth without becoming gelatinous, making them the most texture-neutral seed for liquid-based meals [2].
Hemp Protein Powder vs. Hemp Hearts
Hemp protein powder concentrates the protein: 50g protein per 100g at 370 kcal — a protein-to-calorie ratio of 13.5g per 100 kcal, versus hemp hearts' 5.7g per 100 kcal. If protein per calorie is the primary tracking goal, hemp protein powder is 2.4x more efficient [1].
The trade-off: hemp protein powder loses most of the fat (11g vs 48.75g per 100g), including 71% of the omega-3 content (2.5g vs 8.68g). It also loses the rich nutty flavor. What it gains: 18g fiber per 100g (vs 4g in hemp hearts) and 12mg iron per 100g (vs 7.95mg), concentrated from the hull and protein fractions [2].
For a 30g scoop: hemp protein powder: 111 kcal, 15g protein, 5.4g fiber vs hemp hearts: 166 kcal, 9.5g protein, 1.2g fiber, 2.6g omega-3. The powder wins on protein and fiber per serving; the hearts win on omega-3, taste, and mineral density per calorie [3].
Hemp Seeds vs. Other Plant-Based Protein Seeds (per 100g)
| Nutrient | Hemp Seeds | Chia Seeds | Flaxseed | Pumpkin Seeds | Sunflower Seeds |
|---|---|---|---|---|---|
| Calories (kcal) | 553 | 486 | 534 | 559 | 584 |
| Protein (g) | 31.6 | 16.5 | 18.3 | 30.2 | 20.8 |
| Omega-3 (g) | 8.7 | 17.8 | 22.8 | 0.12 | 0.07 |
| Magnesium (mg) | 700 | 335 | 392 | 592 | 325 |
| Zinc (mg) | 9.9 | 4.6 | 4.3 | 7.8 | 5.0 |
| Fiber (g) | 4.0 | 34.4 | 27.3 | 6.0 | 8.6 |
Practical Tips for Hemp Seeds
- 1
3 tablespoons = 166 kcal with 9.5g complete plant protein — the highest-quality plant protein available in raw seed form [1].
- 2
Omega-6:omega-3 ratio of 3:1 — the most balanced ratio among common seeds and nuts. 30g provides 2.6g ALA, exceeding the daily adequate intake [2].
- 3
700mg magnesium per 100g (167% DV) — more than any other common food including pumpkin seeds. Three tablespoons = 50% DV magnesium [1].
- 4
Hemp seeds blend smoother than chia or flax — no gel formation, making them ideal for smoothies and liquid meals without texture change [2].
- 5
Hemp protein powder has 2.4x better protein-per-calorie than hemp hearts (13.5 vs 5.7g per 100 kcal) but loses ~71% of the omega-3 [1].
Frequently Asked Questions — Hemp Seeds
How many calories are in hemp seeds?
Are hemp seeds a complete protein?
How much magnesium is in hemp seeds?
What is the omega-3 to omega-6 ratio in hemp seeds?
What is the difference between hemp hearts and hemp seeds?
Do hemp seeds contain THC?
Important Notice
Nutritional values are based on USDA FoodData Central data for seeds, hemp seed, hulled (FDC 170148). Unhulled, toasted, and protein powder values are estimated from published analytical studies and manufacturer specifications. Hemp seed oil values are based on cold-pressed product averages. Actual values vary by cultivar, growing region, and processing method. This tool is for informational and nutrition journaling purposes only — it is not a substitute for guidance from a qualified nutrition professional.
About the Author
Certified fitness professional and nutrition researcher with over 10 years of experience in the fitness and wellness industry. Founder of Food Nutrify, dedicated to making accurate, science-backed nutrition data accessible to everyone through free, easy-to-use calculators.
References & Sources
- [1] USDA FoodData Central (2024). Seeds, hemp seed, hulled (FDC 170148). U.S. Department of Agriculture, Agricultural Research Service.
- [2] Farinon, B. et al. (2024). Hemp seeds: Nutritional value, associated bioactivities and the potential food and non-food applications. PMC — Frontiers in Nutrition.
- [3] Hussain, S. et al. (2021). Nutrition and health benefits of hemp-seed protein (Cannabis sativa L.). ResearchGate — Journal of Food Processing and Preservation.