Hemp: Benefits, Dosage, Contraindications

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Hemp is an annual plant from the Cannabaceae family, cultivated for thousands of years for its fibers, seeds, and oil. Originally from Central Asia, hemp is now grown in many countries worldwide. It can reach up to 5 meters in height and has serrated leaves and green or yellow flowers. The fibers from its stalk are used to manufacture textiles and other materials, while its seeds are pressed to produce a dark green, nut-flavored oil, appreciated in dressings and also in cosmetics. Despite its relation to cannabis, hemp is distinguished by its low THC content, below 0.3%, making it suitable for consumption. It is important to remember that THC is a psychoactive responsible for feelings of euphoria, relaxation, and alterations in sensory perception and time. Its use is regulated. Hemp oil is rich in essential fatty acids, such as linoleic acid (omega-6) and alpha-linolenic acid (omega-3), in ideal proportions for effective human assimilation. It also contains monounsaturated and saturated fatty acids, phytosterols like beta-sitosterol, and vitamins A, B, and E, contributing to its anti-inflammatory properties. Hemp is used in numerous contexts, including constipation, eczema, and joint pain.

Other name(s) 

Cannabis

Scientific name(s)

Cannabis sativa L

Family or group: 

Plants

Active ingredients:

CBD

Alpha-linolenic acid

Linoleic acid

Oleic acid

Gamma-linolenic acid

Stearidonic acid (SDA)


Indications

Rating methodology

EFSA approval.

Several clinical trials (> 2) randomized controlled with double blind, including a significant number of patients (>100) with consistently positive outcomes for the indication.
Several clinical trials (> 2) randomized controlled with double blind, and including a significant number of patients (>100) with positive outcomes for the indication.
One or more randomized studies or multiple cohorts or epidemiological studies with positive outcomes for the indication.
Clinical studies exist but are uncontrolled, with conclusions that may be positive or contradictory.
Lack of clinical studies to date that can demonstrate the indication.


Eczema
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A small preliminary clinical trial in patients with eczema shows that daily intake of 30 ml hemp seed oil for 8 weeks improves skin dryness and itchiness compared to the baseline, but not against an olive oil control.

Posologie

posologieOral: seed

posologie30 mL

formulationoil


Joint Pain
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Hemp is traditionally used against arthritis and joint pain. In vitro, hemp seed oil induces the production of an anti-rheumatoid factor, as well as apoptosis of a rheumatoid arthritis synovial cell line.

Posologie

posologieOral: seed

posologie30 mL

formulationoil


Multiple Sclerosis
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In a small clinical study on patients with multiple sclerosis, daily intake of a combination of hemp seed oil (5.4-6.3 g) and evening primrose oil three times a day for 6 months appeared to improve disability scores and relapse rates compared to baseline values. However, the control group, consuming olive oil, also noted significant improvements in terms of disability and relapse rates. The study has certain limitations, making it challenging to determine the specific efficacy of hemp oil in this context.

Posologie

posologieOral: seed

posologie5 g

formulationoil


Synergies


Properties


Anti-inflammatory

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Hemp oil is recognized for its anti-inflammatory properties, mainly attributed to its richness in essential fatty acids such as alpha-linolenic acid (omega-3) and linoleic acid (omega-6). These components help modulate the body's inflammatory processes by reducing the production of inflammatory cytokines and mediators like prostaglandins. Additionally, research suggests that hydrolyzed proteins extracted from hemp seeds can inhibit certain cellular pathways involved in inflammation.

Usages associés

Eczema

Hypolipidemic

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Hemp oil, rich in omega-6 and omega-3 polyunsaturated fatty acids, is gaining interest for its potential hypolipidemic effects, particularly for reducing plasma cholesterol. However, human research, both on hypercholesterolemic children and healthy adults, as well as most animal studies, have not confirmed this cholesterol-lowering effect. Nonetheless, a small clinical trial on obese adults showed that daily intake of 60 mg hemp oil extract could slightly increase HDL cholesterol, with a rise of about 3 mg/dL after six weeks, compared to a decrease in the placebo group. Moreover, it is suggested that peptides from hemp proteins, such as edestin and albumin, might have hypolipidemic effects. In the laboratory, certain peptides from hemp seeds have inhibited the enzyme HMG-CoA reductase and increased LDL cholesterol absorption by cells by stimulating LDL receptor expression.


Digestive Effect

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Hemp seeds are traditionally used to improve digestion, especially in cases of constipation. Studies on animal models have shown that hemp seeds increase stool water content and bowel movements due to increased mucus secretion by the colonic tissue. This action would involve the activation of certain channels or electrolyte exchangers. Furthermore, animal research also suggests that defatted hemp protein might help prevent liver steatosis or fatty liver disease by reducing elevations of liver enzymes and steatosis markers, particularly within the context of a high-fat diet.


Safety dosage

Adult: 30 mL (oil)

Hemp seed oil at doses of 30 mL (equivalent to 27 g) per day has been used for 2 months.