# Hemp Seed (Cannabis sativa)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/hemp-seed
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-24
**Evidence Score:** 2 / 10
**Category:** Fruit
**Also Known As:** Cannabis sativa L., Hemp hearts, Hulled hemp seeds, Huo ma ren, Cannabis seeds, Industrial hemp seeds, Hemp nuts

## Overview

Hemp seed contains gamma-linolenic acid (1-4%) and alpha-linolenic acid (15-25%), essential fatty acids that modulate [inflammatory pathway](/ingredients/condition/inflammation)s. These compounds may support [cardiovascular health](/ingredients/condition/heart-health) through ACE inhibition and renin modulation, though human studies show limited blood pressure effects.

## Health Benefits

• May support [cardiovascular health](/ingredients/condition/heart-health) through ACE inhibition and renin modulation, though human trials showed non-significant blood pressure effects (Preliminary evidence)
• Contains gamma-linolenic acid (1-4%) and alpha-linolenic acid (15-25%), essential fatty acids important for inflammatory balance (Traditional use)
• Provides complete protein with 20-30% edestin and albumin content for nutritional support (Established nutrient profile)
• May improve intestinal barrier function and reduce [inflammation](/ingredients/condition/inflammation) through macrophage polarization (Preclinical evidence only)
• Traditional Chinese medicine use for over 3,000 years for constipation and skin conditions (Historical evidence)

## Mechanism of Action

Hemp seed's gamma-linolenic acid converts to dihomo-gamma-linolenic acid, which produces anti-inflammatory prostaglandin E1 and suppresses [pro-inflammatory cytokine](/ingredients/condition/inflammation) production. Alpha-linolenic acid undergoes conversion to EPA and DHA, modulating COX and LOX enzyme pathways. These fatty acids may inhibit angiotensin-converting enzyme (ACE) and modulate renin-angiotensin system activity for [cardiovascular](/ingredients/condition/heart-health) support.

## Clinical Summary

Preliminary human trials examining hemp seed's cardiovascular effects showed non-significant reductions in [blood pressure](/ingredients/condition/heart-health) despite theoretical ACE inhibitory activity. The evidence base consists primarily of small-scale studies and in vitro research rather than large randomized controlled trials. Most research focuses on the fatty acid composition and potential [anti-inflammatory](/ingredients/condition/inflammation) effects rather than clinical outcomes. Current evidence is insufficient to establish definitive therapeutic benefits in humans.

## Nutritional Profile

Hemp seeds are nutritionally dense with macronutrients per 100g (hulled/shelled): protein 31-35g (complete protein containing all 9 essential amino acids; dominated by edestin 60-80% of total protein and albumin 20-40%, both highly digestible at ~91-98% PDCAAS score); fat 47-50g total (omega-6 linoleic acid 54-60% of fatty acids ~28-30g, omega-3 alpha-linolenic acid 15-25% ~8-12g, gamma-linolenic acid 1-4% ~0.5-2g, oleic acid 9-12%); carbohydrates 5-8g (hulled seeds low fiber; whole seeds with hull contain 27-35g total carbohydrate with 20-28g fiber). Micronutrients per 100g: magnesium 483mg (~115% DV), phosphorus 1160mg (~93% DV), potassium 859mg (~18% DV), zinc 9.9mg (~90% DV), iron 7.9mg (~44% DV), manganese 7.6mg (~330% DV), copper 1.6mg (~178% DV), calcium 70mg (~5% DV). Vitamins: vitamin E (tocopherols) 90mg predominantly gamma-tocopherol (~600% DV), thiamine B1 1.3mg (~108% DV), riboflavin B2 0.3mg (~23% DV), niacin B3 9.2mg (~58% DV), B6 0.12mg (~7% DV), folate 110mcg (~28% DV). Bioactive compounds: phytosterols 190-220mg/100g (beta-sitosterol, campesterol); lignanamides including cannabisin A-G; phenolic acids including caffeic acid and ferulic acid; terpenes including myrcene and caryophyllene in trace amounts; cannabidiol (CBD) and THC present only in negligible trace amounts in seeds (<0.001% if seed surface is clean). Bioavailability notes: zinc and iron bioavailability moderately reduced by phytate content (~3.6g phytic acid/100g); omega-3 ALA conversion to EPA/DHA is limited (~5-10% conversion efficiency in humans); protein digestibility enhanced when seeds are hulled; fat-soluble vitamin E absorption improved when consumed with the seed's native fat content.

## Dosage & Preparation

Clinically studied dose: 50g/day hemp seed protein (divided twice daily) or 45g hemp seed protein plus 5g hydrolysate for 6 weeks. No standardized extracts or established dosage ranges exist for hemp seed oil or other forms based on human trials. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Hemp seed is generally recognized as safe for most adults when consumed as food, with minimal reported adverse effects. Theoretical interactions may occur with anticoagulant medications due to omega-3 fatty acid content affecting bleeding time. Individuals with cannabis allergies should exercise caution, though hemp seed contains negligible THC levels (less than 0.3%). Safety during pregnancy and lactation has not been extensively studied, warranting conservative use in these populations.

## Scientific Research

The primary clinical evidence comes from a double-blind, randomized crossover trial (n=35 adults with mild hypertension) testing 50g/day hemp seed protein versus casein over 6-week periods, which found no significant reduction in 24-hour [blood pressure](/ingredients/condition/heart-health) compared to control (Trial NCT03508895). No completed RCTs, meta-analyses, or human trials on metabolic or [inflammatory](/ingredients/condition/inflammation) outcomes are currently available, with most mechanistic evidence limited to preclinical studies.

## Historical & Cultural Context

Hemp seeds have been used in traditional Chinese medicine as 'huo ma ren' for over 3,000 years to treat constipation, [inflammation](/ingredients/condition/inflammation), and skin conditions due to their lubricating and detoxifying properties. Historical records from ancient China document seed consumption for nutritional support and mild ailments, predating modern cultivation methods.

## Synergistic Combinations

Flax seed, chia seed, pumpkin seed, omega-3 fatty acids, plant-based protein blends

## Frequently Asked Questions

### How much gamma-linolenic acid is in hemp seed?

Hemp seed contains 1-4% gamma-linolenic acid by weight, making it one of the few dietary sources of this omega-6 fatty acid. A typical 30-gram serving provides approximately 300-1200mg of gamma-linolenic acid.

### Does hemp seed lower blood pressure?

While hemp seed contains compounds that theoretically inhibit ACE enzyme activity, human trials have shown non-significant blood pressure reductions. The cardiovascular benefits remain preliminary and require larger clinical studies for confirmation.

### Can hemp seed cause positive drug tests?

Hemp seed contains less than 0.3% THC and should not cause positive drug tests when consumed in normal dietary amounts. However, extremely high consumption or contaminated products could theoretically result in trace THC detection.

### What's the difference between hemp seed oil and hemp seed?

Hemp seed oil is extracted from whole hemp seeds and contains concentrated fatty acids but lacks protein and fiber. Whole hemp seeds provide complete protein (25-35%), fiber, minerals, and the same beneficial fatty acid profile in a less concentrated form.

### How much alpha-linolenic acid does hemp seed provide?

Hemp seed contains 15-25% alpha-linolenic acid, providing approximately 4.5-7.5 grams per 30-gram serving. This represents roughly 3-5 times the adequate intake recommendation for omega-3 fatty acids established by health authorities.

### Is hemp seed safe during pregnancy and breastfeeding?

Hemp seed is generally considered safe as a food during pregnancy and breastfeeding, as it is a whole food with no psychoactive THC in the seed itself. However, pregnant or nursing individuals should consult with their healthcare provider before adding supplements, as research on concentrated hemp seed extracts during these periods is limited. Hemp seed's nutritional profile—including complete protein and essential fatty acids—may support maternal nutrition when consumed as food.

### What form of hemp seed has the best bioavailability?

Whole hemp seeds and cold-pressed hemp seed oil offer the most bioavailable forms, as the nutrients are naturally intact and not subjected to heat processing that can degrade essential fatty acids and fat-soluble compounds. Ground or milled hemp seeds increase digestibility compared to whole seeds, making the edestin and albumin proteins more accessible to the body. Hulled seeds (with the outer shell removed) provide similar bioavailability to ground seeds while being easier to consume.

### Does hemp seed interact with blood pressure or heart medications?

While hemp seed shows preliminary evidence of ACE-inhibitory properties, there is no established significant interaction with common blood pressure medications like ACE inhibitors or beta-blockers at typical dietary intake levels. Individuals taking anticoagulants or antiplatelet medications should note that hemp seed contains vitamin K, which may theoretically interact with these drugs in very high amounts. Anyone on cardiovascular medications should inform their healthcare provider before adding hemp seed supplements to monitor for additive effects.

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