Hemp Seeds: Nutrition Facts, Health Benefits, and the Complete Guide to a Genuinely Complete Plant Protein

Hemp seeds carry some of the most extraordinary mineral figures of any food on this entire site — per 100g, 330% of daily manganese, 178% of copper, 167% of magnesium, 132% of phosphorus, 107% of thiamine, and 90% of zinc, several of which exceed a full day’s requirement in amounts far smaller than 100g. Combined with 31.6g of protein containing all nine essential amino acids and a relatively balanced omega-6 to omega-3 ratio for a seed this rich in polyunsaturated fat, hemp seeds are one of the most nutritionally dense plant foods available, entirely separate from any of the legal or cultural confusion that sometimes surrounds the word “hemp” itself.

Hemp Seeds Nutrition Facts (per 100g, hulled)

USDA’s figures for hulled hemp seeds (hemp hearts). The omega-6 figure is the polyunsaturated fat that isn’t omega-3, so it’s approximate.

Hemp Seeds Nutrition Facts (per 30g serving — approximately 3 tablespoons)

A standard serving of hemp hearts (shelled hemp seeds) is approximately 30g:

A 30g serving — about three tablespoons, a typical amount stirred into a smoothie or yogurt — already provides about a full day’s manganese, more than half your daily copper, half your daily magnesium, and nearly 10g of protein.

Vitamins in Hemp Seeds (per 100g)

USDA’s data for hemp seeds doesn’t include Vitamin D, Vitamin K, pantothenic acid, or B12.

Standout: Hemp seeds’ thiamine content exceeds the full daily value at 107% DV per 100g, making them one of the richest thiamine sources of any food. Thiamine is an essential coenzyme for converting carbohydrates into cellular energy, and even a typical 30g serving provides about a third of the daily value. Niacin at 58% DV, B6 at 35% DV, folate at 28% DV, and riboflavin at 22% DV complete a genuinely outstanding B vitamin profile.

Minerals in Hemp Seeds (per 100g)

USDA’s data for hemp seeds doesn’t include selenium.

Multiple extraordinary standouts: Hemp seeds’ manganese (330% DV) and copper (178% DV) are remarkable, and their magnesium (167% DV) and phosphorus (132% DV) are the highest of any food covered on this site so far. Magnesium is involved in over 300 enzymatic reactions including ATP production and muscle function, while phosphorus serves as both a structural bone mineral and a component of ATP itself. Zinc at 90% DV and iron at 44% DV round out one of the most mineral-dense plant foods available anywhere — though, as with other seeds, phytic acid reduces how much of the iron and zinc the body absorbs.

Hemp Seed Protein: All Nine Essential Amino Acids

Hemp seeds are one of the most protein-rich whole plant foods available, at 31.6g per 100g — and roughly 9.5g in a typical 30g serving.

Like soy, quinoa, and chia, hemp seed protein contains all nine essential amino acids, which is why it’s often marketed as a complete plant protein. The fine print is that lysine is relatively low — it’s hemp’s limiting amino acid — so its protein quality score (PDCAAS) for hulled seeds comes out at around 0.6, below soy and well below animal proteins such as whey and egg. Hemp protein is easy to digest, and it’s especially rich in arginine and the sulphur-containing amino acids that legumes lack.

The practical takeaway for plant-based eaters: hemp seeds are an excellent protein contributor, and pairing them with lysine-rich foods such as beans, lentils, or soy across the day makes up for their lower lysine — the two complement each other well. Leucine, the amino acid that acts as the primary trigger for muscle protein synthesis, is present but at lower concentrations than in animal proteins.

The Omega-6 to Omega-3 Ratio: A Relatively Balanced Profile for a Seed This Fat-Dense

Hemp seeds contain 38.1g of polyunsaturated fat per 100g, made up of 9.3g of omega-3 and roughly 28.8g of omega-6 — a ratio of about 3:1 in favor of omega-6.

At first glance this might seem unfavorable, since modern diets are typically already skewed heavily toward omega-6 from seed oils. However, hemp seeds’ roughly 3:1 ratio is considerably more balanced than most dietary fat sources — many common cooking oils and processed foods carry ratios of 10:1 or far higher. Hemp seed isn’t as omega-3-dominant as flaxseed or chia seed, but it’s one of the more balanced whole-food fat sources. Hemp seeds also contain small amounts of gamma-linolenic acid (GLA) and stearidonic acid (SDA) — less common fatty acids that are of research interest for their potential anti-inflammatory effects, distinct from the linoleic acid that dominates seed oils.

The practical takeaway: hemp seeds contribute meaningful plant omega-3 (ALA) alongside their omega-6, and their relatively balanced ratio means they’re unlikely to worsen an already skewed dietary omega-6 to omega-3 balance the way many other fat sources would. Note that the body converts only a small fraction of plant ALA into the long-chain EPA and DHA found in fish.

Addressing the Obvious Question: Hemp Seeds, Cannabis, and THC

This is worth answering directly and clearly, since it’s almost certainly the first question many people have on seeing “hemp” on a food label.

Hemp seeds do not produce intoxicating effects, and properly processed hemp seed products sold as food contain negligible THC (tetrahydrocannabinol, the psychoactive compound in cannabis). Hemp and the cannabis grown for THC are both varieties of Cannabis sativa, but food-grade hemp comes from low-THC varieties specifically bred and regulated for this purpose. The seeds themselves contain essentially no THC; trace amounts can cling to the outside of the shell from the surrounding plant material, and almost all of this is removed during the cleaning and hulling required before the seeds are sold as food.

In many jurisdictions, including the EU, food-grade hemp products must meet strict legal THC limits, and reputable hemp seed and hemp protein products are produced under these regulations to ensure they’re non-intoxicating for everyday consumption. This is why hemp seeds, hemp hearts, and hemp protein powder are widely and legally available as food in countries where recreational cannabis remains restricted.

Hulled vs Unhulled Hemp Seeds: What’s the Difference?

Hulled hemp seeds (hemp hearts) — the outer fibrous shell has been removed, leaving the soft, creamy inner seed. This is the most common form sold for direct eating, with a mild, nutty flavor and no preparation required. The nutritional data on this page is for this form.

Unhulled hemp seeds — the shell remains intact, providing considerably more fiber than hulled hemp hearts but a tougher, less palatable texture that most people find less pleasant to eat directly. Often used for sprouting or in products where the whole seed structure is preserved.

For most everyday culinary use, hulled hemp hearts are the more practical and widely available choice, offering the full protein, mineral, and fat profile in an easily eaten form.

Health Benefits of Hemp Seeds

Outstanding Magnesium and Phosphorus

Both exceeding 100% DV per 100g, these minerals work together extensively for bone structure and cellular energy production. Many people fall short of the recommended magnesium intake, making hemp seeds’ contribution genuinely useful even at modest daily serving sizes.

Exceptional Manganese and Copper

At 330% DV manganese and 178% DV copper per 100g, hemp seeds are among the richest food sources of both. Manganese is part of the mitochondrial antioxidant enzyme manganese superoxide dismutase and supports bone formation, while copper is essential for iron metabolism, connective tissue formation, and energy production.

High-Quality Plant Protein

As detailed above, hemp seeds provide all nine essential amino acids at 31.6g of protein per 100g — a valuable part of a varied plant-based protein strategy, especially alongside lysine-rich legumes.

A Relatively Balanced Fat Profile

The relatively balanced omega-6 to omega-3 ratio, combined with the presence of GLA and SDA, gives hemp seeds a more favorable fat profile than most other concentrated plant fat sources.

Strong Zinc for Immune Function

At 90% DV per 100g, hemp seeds’ zinc content is higher per 100g than many animal protein sources, supporting immune cell function, testosterone production, wound healing, and protein synthesis — though less of the zinc is absorbed than from meat because of the seeds’ phytic acid.

Strong Iron Contribution

At 44% DV per 100g in non-haem form, hemp seeds make a meaningful contribution to iron intake for plant-based eaters, particularly when paired with Vitamin C-rich foods to enhance absorption.

Thiamine and Niacin for Energy Metabolism

The exceptional thiamine (107% DV) and strong niacin (58% DV) content directly support the conversion of food into usable cellular energy, relevant to both general metabolic health and the energy demands of regular training.

Fibre and Digestive Health

At 4.0g per 100g (considerably more in unhulled form), hemp hearts make a modest contribution to fiber intake, supporting digestive regularity and feeding beneficial gut bacteria.

Hemp Seeds for Athletes and Active People

An Easy Plant Protein Boost

For plant-based athletes, hemp hearts add nearly 10g of protein per 30g serving to smoothies, oats, or salads with no preparation — and combine well with lysine-rich legumes and soy to round out the day’s amino acid intake.

Magnesium for Training Demands

Athletes lose some magnesium through sweat, and hemp seeds’ 167% DV per 100g (still 50% DV in a modest 30g serving) makes them one of the most concentrated dietary magnesium sources available for supporting ATP production and muscle function.

Zinc and Iron for Recovery and Oxygen Transport

The strong zinc and iron content supports immune resilience during heavy training blocks and contributes to the iron status that underpins oxygen-carrying capacity, particularly valuable for plant-based athletes managing these two nutrients without animal sources.

A Practical, No-Preparation Daily Addition

Like chia seeds, hemp hearts require no grinding, soaking, or preparation — they can be sprinkled directly onto food, making them one of the easiest small daily nutritional upgrades available for busy training schedules.

Hemp Seeds vs Chia Seeds and Flaxseeds: A Quick Comparison

Hemp seeds stand out clearly for protein and magnesium among this trio, and they’re easier to use than flaxseed since no grinding is required. Chia and flax dominate on fiber and omega-3 density, making all three genuinely complementary rather than directly interchangeable, depending on what a person’s diet most needs.

Practical Ways to Include Hemp Seeds in Your Diet

Sprinkled over yogurt or oats — adds a mild, nutty flavor along with a substantial protein, magnesium, and zinc boost with zero preparation.

Blended into smoothies — hemp hearts blend smoothly and add protein without significantly altering taste.

As a salad topping — provides texture and a meaningful nutritional boost to an otherwise lighter meal.

Hemp seed milk or hemp protein powder — processed alternatives that concentrate specific aspects of hemp seed’s nutritional profile, useful for people who want the protein contribution without the whole seed’s fat and calorie load.

Mixed into homemade energy balls or bars — adds protein and a pleasant texture to no-bake snacks alongside dried fruit and nuts.

Potential Considerations

THC content is negligible in properly processed food-grade hemp seeds — as detailed above, reputable commercial hemp seed products are regulated and processed to avoid meaningful THC content. Athletes subject to drug testing should still choose reputable brands, since poorly cleaned products have occasionally contained more THC than expected.

Calorie and fat density — at 553 kcal per 100g, portion awareness matters; the small daily serving sizes typically used (1–3 tablespoons) keep this in reasonable check for most people.

Storage — hemp hearts are rich in polyunsaturated fat, which can go rancid; keep them sealed, and refrigerate or freeze once opened.

Omega-6 content for those specifically minimizing omega-6 intake — while hemp seeds’ ratio is more balanced than most fat sources, anyone deliberately minimizing total omega-6 intake may prefer flaxseed or chia seed, given their more omega-3-dominant profiles.

Allergies — hemp seed allergy is uncommon but documented; people with known sensitivities to other seeds should introduce hemp seeds cautiously.

Nutrient data: USDA FoodData Central, SR Legacy — seeds, hemp seed, hulled (FDC ID 170148). Chia and flaxseed values from the Foundation Foods entries used on our chia seeds and flaxseeds pages. % Daily Values use the FDA’s current Daily Values.