Grapefruit Seed Extract

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Grapefruit Seed Extract supports healthy immune function and a healthy gastrointestinal tract by providing potent antioxidants and a unique profile of bioflavonoids packed with numerous health-promoting benefits. The formula is made with a powerful 10:1 extract for extra potency and optimal health benefits.


  • Support for healthy immune function
  • Promotes a healthy gastrointestinal tract
  • Support for cardiovascular health
  • Promotes healthy antioxidant capacity
  • Promotes healthy endothelial function
  • Support for a healthy gut microbiome
  • Promotes healthy skin
  • Supports healthy inflammatory markers

Take one capsule with food up to four times daily or as directed by your healthcare practitioner.

Does Not Contain
Gluten, corn, yeast, artificial colors and flavors.

If you are pregnant, nursing, or taking medication, consult your healthcare practitioner before use. Keep out of reach of children.


Grapefruit Seed Extract is an extract of grapefruit seeds. The grapefruit seed extract we use has been shown via third-party testing to be free of the potentially dangerous contaminants triclosan, benzethonium chloride, and benzalkonium chloride.

How Grapefruit Seed Extract Works

Grapefruit seed extract is a widely researched extract derived from Citrus paradisi, a bitter citrus. Grapefruit seed extract has been demonstrated in clinical research to support healthy immune function and a healthy gastrointestinal tract by providing potent antioxidants and a unique profile of bioflavonoids, notably hesperidin, naringin, and naringenin.t1,2 Hesperidin has been studied for its effect on balancing and nourishing the gastrointestinal tract and microbiome in humans.t3,4 It is known to have antioxidant properties and promote healthy inflammatory markers.t5,6 Hesperidin has been widely studied for its support of healthy endothelial function and its ability to support healthy blood pressure levels already in the normal range.t7,8 The bioflavonoid naringin is found in high concentrations in grapefruit seed extract. Naringin has been shown to support cardiovascular health, bone health, cognitive function, and healthy metabolism.t9,10,11 It also has powerful antioxidant properties to support immune health and promotes healthy inflammatory markers.t12,13 Naringenins main function in the body is as an antioxidant, whereby it helps to promote healthy oxidative stress responses by stopping free radical reactions.t14 This process includes the molecules superoxide dismutase, catalase, and glutathione peroxidase, which gives naringenin its powerful health benefits.t15,16

Grapefruit Seed Extract Supplementation

The bioflavonoids in NutriRestore’s Grapefruit Seed Extract are packed with health-promoting benefits backed by clinical evidence demonstrating their potent antioxidant properties.t

Why We Love this Grapefruit Seed Extract product

There are several reasons why we love this Grapefruit Seed Extract product, but we will highlight the top two.
First, grapefruit seed extract, the ingredient, has been shown in research to be an effective broad-spectrum antimicrobial that can have impact on several different microbes. This can be useful against microbes like candida (or other forms of yeast), bacterial overgrowth and has even been shown to have inhibitory effects on certain viruses.
Second, this Grapefruit Seed Extract product has been tested thoroughly to confirm that it does not contain any dangerous contaminants. You will commonly read about grapefruit seed extract as being a potentially dangerous ingredient because it can be contaminated with triclosan, benzethonium chloride and benzalkonium chloride. Our Grapefruit Seed Extract has been tested over and over to confirm it is free from these contaminants.


† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

  1. Peterson JJ, Beecher GR, Bhagwat SA, et al. J Food Compos Anal. 2006;19:S74-S80.
  2. Giamperi L, Fraternale D, Bucchini A, Ricci D. Fitoterapia. 2004;75(2):221-224.
  3. Estruel-Amades S, Massot-Cladera M, Pérez-Cano FJ, et al. Nutrients. 2019;11(2):324.
  4. Stevens Y, Rymenant EV, Grootaert C, et al. Nutrients. 2019;11(7):1464.
  5. Li C & Schluesener H. Crit Rev Food Sci Nutr. 2017;57(3):613-631.
  6. Haidari F, Heybar H, Jalali MT, et al. J Am Coll Nutr. 2015;34(3):205-211.
  7. Salden BN, Troost FJ, Groot ED.  Am J Clin Nutr. 2016;104(6):1523-1533.
  8. Morand C, Dubray C, Milenkovic D, et al. Am J Clin Nutr. 2011;93(1):73-80.
  9. Viswanatha GL, Shylaja H, Moolemath Y. Biomed Pharmacother. 2017;94:909-929.
  10. Alam MA, Subhan N, Rahman MM, et al. Adv Nutr. 2014;5(4):404-417.
  11. Pannu A, Sharma PC, Thakur VK, Goyal RK. Biomolecules. 2021;11(12):1825.
  12. Chen R, Qi QL, Wang MT, Li QY. Pharm Biol. 2016;54(12):3203-3210.
  13. Zhao H, Liu M, Liu H, Suo R, Lu C. Biosci Rep. 2020;40(7).
  14. Salehi B, Fokou PVT, Sharifi-Rad M, et al. Pharmaceuticals. 2019;12(1):11.
  15. Pari L & Gnanasoundari M. Basic Clin Pharmacol Toxicol. 2006;98(5):456-461.
  16. Wang J, Yang Z, Lin L, et al. Biol Trace Elem Res. 2012;146:354–359.


Always be sure to speak with your healthcare provider before starting any new nutritional supplement when pregnant or nursing. For children, we recommend speaking with your child's pediatrician regarding proper dosing. Store away from children.

If loose stools occur, stop use and notify your healthcare practitioner.