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N-A-G 700 mg

Jarrow Formulas
4.6
★ ★ ★ ★ ★
(3522 ratings)
N-Acetyl Glucosamine 700 mg
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Score87
A substantial, clearly identified N-acetyl-D-glucosamine serving makes this a focused option. Its narrow skin coverage and unknown source are the main limitations.
How scoring works
Quantity:120 Veggie Cap(s) • (120 servings)
Goals:
Skin Health

Score 87

A substantial, clearly identified N-acetyl-D-glucosamine serving makes this a focused option. Its narrow skin coverage and unknown source are the main limitations.
How scoring works
$19.99($0.16 per serving)
Pure Formulas
$ 19.99
Vitacost
$ 25.09
Daily Vita
$ 21.99
Amazon
$ 25.69
iHerb
$ 25.69
Vitacost
$ 25.09
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Analysis

The 700 mg N-acetyl-D-glucosamine serving is substantial and clearly identified. A single-active vegetable capsule keeps the formula straightforward and leaves little ambiguity about the intended ingredient.

NAG may support hyaluronic-acid production and skin hydration, though oral evidence is not as established as it is for some better-studied structural ingredients. The product also lacks collagen, antioxidant, and barrier-lipid support, so it addresses only one part of skin health.

The active isomer and amount are transparent, but the source is not disclosed. People who need to distinguish shellfish-derived NAG from fermentation-derived NAG cannot do so from the supplied label.

Who is it for
  • People who want a higher-potency single-ingredient NAG capsule
  • Users building a broader skin-support stack
Best for
  • Clearly defined N-acetyl-D-glucosamine
  • Simple, substantial daily dosing

Pros

  • Supplies 700 mg of the identified D-isomer
  • Uses a vegetable capsule
  • Contains no competing active ingredients

Cons

  • Ingredient source is not identified
  • Oral skin evidence is still developing
  • Provides no collagen or antioxidant support

Warnings

  • The undisclosed N-acetyl-D-glucosamine source prevents people with shellfish allergy from confirming suitability from the label.

Nutrient quality

94 Highest impact

The explicitly identified D-isomer provides strong form quality. A substantial supportive amount fits the intended use without obvious excess or unrelated additions.

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Ingredient transparency

84 Highest impact

The active form and amount are disclosed without a hidden blend. Source, complete directions, and inactive ingredients are not supplied.

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Customer satisfaction

69 High impact

The supplied average rating is strong. A very large rating base makes the average dependable, but no detailed experience evidence was supplied.

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Value for money

98 Highest impact

Serving economics are highly favorable. Formula quality supports the asking price well.

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Goals

Skin Health
Impact
Highest effect
B+ Goal FitA+ Strength of SupportC+ CoverageA+ Formula Quality
N-Acetyl Glucosamine · 700 mg

N-acetyl-D-glucosamine is a specific precursor for hyaluronic acid and may support skin hydration and tone. Human evidence is promising but more limited for oral use than for established structural ingredients such as collagen.

The high-potency amount and D-isomer are fully disclosed in a simple capsule. The source is not stated, so people with a shellfish allergy cannot confirm suitability from the supplied label.

Study evidence
N-Acetyl Glucosamine Supportive 7 studies

Ingredients

IngredientAmount per serving
N-Acetyl-D-Glucosamine
700 mg
Gluten Free Adults 18–50 Vegan Dairy Free Vegetarian
Report overview
B Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

The explicitly identified D-isomer and high-potency 700 mg dose make the active ingredient well defined and substantial. A vegetable capsule with no listed supporting ingredients keeps the delivery simple, while the cost per active dose is highly favorable. The NAG source is not disclosed, so people with a shellfish allergy cannot confirm from the supplied label whether it is suitable.

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Sources

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

  1. Preparation, characterization, and moisturizing effect of liposomes containing glucosamine and N-acetyl glucosamine.
    Malaekeh-Nikouei B; Golmohammadzadeh S; Salmani-Chamanabad S; Mosallaei N; Jamialahmadi K · Journal of cosmetic dermatology · 2014
    Clinical trialSkin Health forN-Acetyl Glucosamine
  2. The effect of N-acetyl-glucosamine on stratum corneum desquamation and water content in human skin.
    Mammone T; Gan D; Fthenakis C; Marenus K · Journal of cosmetic science · 2009
    Clinical trialSkin Health forN-Acetyl Glucosamine
  3. A randomized, investigator-blinded, controlled pilot study to evaluate the safety and efficacy of a poly-N-acetyl glucosamine-derived membrane material in patients with venous leg ulcers.
    Kelechi TJ; Mueller M; Hankin CS; Bronstone A; Samies J; Bonham PA · Journal of the American Academy of Dermatology · 2012
    Randomized trial82 participantsSkin Health forN-Acetyl Glucosamine
  4. Poly-N-acetyl glucosamine nanofibers for negative-pressure wound therapies.
    Fulco I; Erba P; Valeri RC; Vournakis J; Schaefer DJ · Wound repair and regeneration : official publication of the Wound Healing Society [and] the European Tissue Repair Society · 2016
    Randomized trial20 participantsSkin Health forN-Acetyl Glucosamine
  5. Reduction in the appearance of facial hyperpigmentation by topical N-acetyl glucosamine.
    Bissett DL; Robinson LR; Raleigh PS; Miyamoto K; Hakozaki T; Li J; Kelm GR · Journal of cosmetic dermatology · 2007
    Randomized trial50 participantsSkin Health forN-Acetyl Glucosamine