Product Image

Hemp Oil

Manitoba Harvest
4.7
★ ★ ★ ★ ★
(1350 ratings)
Gamma Linolenic Acid 420 mg
Linoleic Acid 8000 mg
Alpha-Linolenic Acid 2000 mg
Stearidonic acid 140 mg
Product Image
Score81
A potent, transparent hemp-oil fatty-acid profile with useful GLA and very high linoleic acid. Processing and oxidation-protection details are missing.
How scoring works
Quantity:12 Liquid(s) • (24 servings)
Goals:
Anti-Inflammatory Support
Skin Health

Score 81

A potent, transparent hemp-oil fatty-acid profile with useful GLA and very high linoleic acid. Processing and oxidation-protection details are missing.
How scoring works
$8.30($0.34 per serving)
iHerb
$ 9.81
Pure Formulas
$ 8.30
Vitacost
$ 10.09
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Analysis

Each liquid serving supplies 8 g of linoleic acid, 420 mg of GLA, 2 g of alpha-linolenic acid, and 140 mg of stearidonic acid. That broad profile supports users seeking multiple plant-based fatty acids rather than an isolated GLA product.

All key fatty-acid amounts are disclosed, making the nutritional contribution easy to judge. The extraction method and any antioxidant protection are not stated, which matters for a polyunsaturated bulk oil.

Twenty-four servings provide a shorter supply than softgel options but strong active-ingredient value. The 13 g total-fat serving also needs to fit the user's diet and preference for liquid oil.

Who is it for
  • Adults seeking plant-based fatty acids
  • Users targeting skin-barrier lipid intake
  • People comfortable taking liquid oil
Best for
  • Broad omega fatty-acid coverage
  • Substantial GLA intake
  • High linoleic acid delivery

Pros

  • Fully quantified fatty-acid profile
  • 420 mg GLA per serving
  • Includes ALA and stearidonic acid

Cons

  • Only 24 servings
  • Extraction method is not disclosed
  • No antioxidant stabilizer is listed

Nutrient quality

85 Highest impact

Hemp oil supplies substantial amounts of GLA, linoleic acid, and alpha-linolenic acid. The label omits extraction and antioxidant-stability details, and the large linoleic acid load makes the oil less targeted.

Ingredient transparency

80 Highest impact

Listed active ingredients have specific amounts and no proprietary blend hides their doses. Complete intake directions and a full non-active ingredient list are not supplied.

Customer satisfaction

70 High impact

The supplied aggregate rating is favorable and rests on a substantial sample. No specific feedback is provided, so repeated complaints and real-world fit with the intended purpose cannot be assessed.

Value for money

87 Highest impact

The effective serving offers good value relative to formula and dose quality. A focused ingredient list supports efficient spending.

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Goals

Anti-Inflammatory Support
Anti-Inflammatory Support
Impact
Highest effect
A- Goal FitA- Strength of SupportB CoverageA Formula Quality
Gamma Linolenic Acid · 420 mg

The hemp oil supplies a substantial amount of gamma-linolenic acid, a precursor to anti-inflammatory prostaglandins. Alpha-linolenic and stearidonic acids add related fatty-acid pathways, giving the oil broader coverage than isolated GLA alone.

The fatty-acid amounts are clearly stated, but hemp is a relatively dilute GLA source and the label omits extraction and antioxidant-stability details. A large linoleic-acid load accompanies the useful GLA amount, so the formula is potent but not especially concentrated for the target pathway.

Study evidence
Gamma Linolenic Acid Supportive 7 studies
Skin Health
Skin Health
Impact
High effect
B Goal FitB+ Strength of SupportC+ CoverageA Formula Quality
Gamma Linolenic Acid · 420 mg

Gamma-linolenic acid and other polyunsaturated fats directly support skin-barrier lipid nutrition. Human evidence supports essential fatty acids for dry or barrier-impaired skin, though hemp oil is less studied than targeted GLA oils.

The gamma-linolenic acid amount is substantial and the broader fatty-acid profile is clearly quantified. Active amounts are transparent, but extraction method and antioxidant protection are not disclosed.

Study evidence
Gamma Linolenic Acid Supportive 9 studies

Ingredients

IngredientAmount per serving
Calories
121 {Calories}
Calories from Fat
117 {Calories}
Total Fat
13 Gram(s)
Saturated Fat
1 Gram(s)
Trans Fat
0 Gram(s)
Polyunsaturated Fat
10 Gram(s)
Monounsaturated Fat
2 Gram(s)
Cholesterol
0 mg
Sodium
0 mg
Total Carbohydrates
1 Gram(s)
Dietary Fiber
0 Gram(s)
Sugar
0 Gram(s)
Protein
0 Gram(s)
Alpha-Linolenic Acid
2000 mg
Linoleic Acid
8000 mg
Gamma-Linolenic Acid
420 mg
Stearidonic Acid
140 mg
Adults 18–50 Vegan Kosher Vegetarian
Report overview
Gamma Linolenic Acid · 420 mg OverallScore72
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

Hemp oil provides a clearly disclosed 420 mg of gamma-linolenic acid per serving, giving it substantial potency for this collection. Hemp is naturally a low-concentration GLA source, and the label does not identify an extraction method or antioxidant stabilizer. Even with those quality uncertainties, the large active serving makes the cost per unit of GLA highly favorable.

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Linoleic Acid · 8000 mg OverallScore68
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

The hemp oil supplies a high amount of clearly disclosed linoleic acid in each serving. Its bulk liquid format delivers very favorable cost efficiency, though no pressing method is stated. The absence of listed antioxidant protection leaves some uncertainty about oxidation during storage.

View ingredientView products
Loading alternative details
77 Performance

Evening Primrose Oil

Barlean's
<p>Its label clearly provides 2.50 g of Total Fat, making it a more clearly defined gamma linolenic acid and linoleic acid option. Compared with the original, its ingredient and goal alignment is stronger, although the input does not provide independent testing or absorption evidence.</p>
78 Performance

Mega GLA Sesame Lignans

Life Extension
<p>Its label clearly provides 0.50 g of Total Fat, making it a more clearly defined gamma linolenic acid option. Compared with the original, its ingredient and goal alignment is stronger, although it does not retain the original product’s linoleic acid coverage.</p>
79 Performance

RxOmega-3

Natural Factors WS WomenSense
<p>Its label clearly provides 500 mg of Evening Primrose Oil, making it a more clearly defined gamma linolenic acid option. Compared with the original, its ingredient and goal alignment is stronger, although it does not retain the original product’s linoleic acid coverage.</p>
82 Budget

Organic Hemp Oil

Manitoba Harvest
<p>Its label clearly provides 117.00{Calories} of Calories from Fat, preserving relevant gamma linolenic acid and linoleic acid coverage. Compared with the original, it lowers the serving cost, although the input does not provide independent testing or absorption evidence.</p>
71 Budget

Triple Omega Complex 3-6-9

21st Century
<p>Its label clearly provides 1 g of Total Fat, preserving relevant gamma linolenic acid and linoleic acid coverage. Compared with the original, it lowers the serving cost, although the input does not provide independent testing or absorption evidence.</p>
80 Budget

Spirulina Natural Tablets

Earthrise
<p>Its label clearly provides 0 g of Total Fat, preserving relevant gamma linolenic acid coverage. Compared with the original, it lowers the serving cost, although it does not retain the original product’s linoleic acid coverage.</p>
81 Value

Hemp Oil

Manitoba Harvest
<p>Its label clearly provides 13 g of Total Fat, keeping the formula relevant to gamma linolenic acid. Compared with the original, the somewhat higher serving cost and ingredient detail create a useful quality-to-cost balance, although it does not retain the original product’s linoleic acid coverage.</p>
73 Value

Triple Omega Complex 3-6-9

21st Century
<p>Its label clearly provides 200 mg of Alpha-Linolenic Acid, keeping the formula relevant to gamma linolenic acid and linoleic acid. Compared with the original, the lower serving cost and ingredient detail create a useful quality-to-cost balance, although the input does not provide independent testing or absorption evidence.</p>
78 Value

Spirulina Natural Tablets

Earthrise
<p>Its label clearly provides 0 g of Total Fat, keeping the formula relevant to gamma linolenic acid. Compared with the original, the somewhat higher serving cost and ingredient detail create a useful quality-to-cost balance, although it does not retain the original product’s linoleic acid coverage.</p>
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Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Effects of altering dietary essential fatty acids on requirements for non-steroidal anti-inflammatory drugs in patients with rheumatoid arthritis: a double blind placebo controlled study.
    Belch JJ; Ansell D; Madhok R; O'Dowd A; Sturrock RD · Annals of the rheumatic diseases · 1988
    Randomized trial49 participantsAnti-Inflammatory Support forGamma Linolenic Acid
  2. Systemic immune inflammation mediates the association of serum omega-3 and omega-6 polyunsaturated fatty acids with biological aging: a national population-based study.
    Shan F; Xiong Y; Pai P; Liu M · Aging clinical and experimental research · 2025
    Cross-sectional study3,376 participantsAnti-Inflammatory Support forGamma Linolenic Acid
  3. Evidence of effectiveness of herbal medicinal products in the treatment of arthritis. Part 2: Rheumatoid arthritis.
    Cameron M; Gagnier JJ; Little CV; Parsons TJ; Blümle A; Chrubasik S · Phytotherapy research : PTR · 2010
    Meta-analysis20 studies pooledAnti-Inflammatory Support forGamma Linolenic Acid
  4. Evening primrose oil in patients with rheumatoid arthritis and side-effects of non-steroidal anti-inflammatory drugs.
    Brzeski M; Madhok R; Capell HA · British journal of rheumatology · 1991
    Randomized trial40 participantsAnti-Inflammatory Support forGamma Linolenic Acid
  5. Prospective clinical trial examining the impact of genetic variation in FADS1 on the metabolism of linoleic acid- and ɣ-linolenic acid-containing botanical oils.
    Sergeant S; Hallmark B; Mathias RA; Mustin TL; Ivester P; Bohannon ML; Ruczinski I; Johnstone L; Seeds MC; Chilton FH · The American journal of clinical nutrition · 2020
    Randomized trial64 participantsAnti-Inflammatory Support forGamma Linolenic Acid
  6. Effect of Evening Primrose Oil on Korean Patients With Mild Atopic Dermatitis: A Randomized, Double-Blinded, Placebo-Controlled Clinical Study.
    Chung BY; Park SY; Jung MJ; Kim HO; Park CW · Annals of dermatology · 2022
    Randomized trial50 participantsSkin Health forGamma Linolenic Acid
  7. Meta-analysis of placebo-controlled studies of the efficacy of Epogam in the treatment of atopic eczema. Relationship between plasma essential fatty acid changes and clinical response.
    Morse PF; Horrobin DF; Manku MS; Stewart JC; Allen R; Littlewood S; Wright S; Burton J; Gould DJ; Holt PJ · The British journal of dermatology · 1989
    Meta-analysis9 studies pooledSkin Health forGamma Linolenic Acid
  8. Reduced levels of prostaglandin precursors in the blood of atopic patients: defective delta-6-desaturase function as a biochemical basis for atopy.
    Manku MS; Horrobin DF; Morse N; Kyte V; Jenkins K; Wright S; Burton JL · Prostaglandins, leukotrienes, and medicine · 1983
    Non-randomized trial50 participantsSkin Health forGamma Linolenic Acid
  9. Effect of borage oil consumption on fatty acid metabolism, transepidermal water loss and skin parameters in elderly people.
    Brosche T; Platt D · Archives of gerontology and geriatrics · 2005
    Non-randomized trial29 participantsSkin Health forGamma Linolenic Acid
  10. Effects of oral supplementation with evening primrose oil for six weeks on plasma essential fatty acids and uremic skin symptoms in hemodialysis patients.
    Yoshimoto-Furuie K; Yoshimoto K; Tanaka T; Saima S; Kikuchi Y; Shay J; Horrobin DF; Echizen H · Nephron · 1999
    Randomized trial16 participantsSkin Health forGamma Linolenic Acid