Gundry MD Polyphenol Dark Spot Diminisher for combination skin

How to apply

Questions and answers

What the research says

• Niacinamide significantly decreased hyperpigmentation and increased skin lightness compared with vehicle alone after 4 weeks of use in women by inhibiting melanosome transfer.

  The British Journal of Dermatology, 2002

• Diglucosyl gallic acid exhibits stronger tyrosinase inhibition than VC with an IC50 of 2.68 mg/mL, and its application as a cosmetic ingredient improves skin brightness while reducing ultraviolet spots, melanin, and erythema in human volunteers.

  International Journal of Cosmetic Science, 2022

• Topical post-laser application of human adipocyte-derived mesenchymal stem cell media combined with niacinamide significantly improved wrinkle index, melanin index, patient satisfaction, and investigator esthetic improvement scores compared to vehicle cream in patients with aging skin.

  Journal of Cosmetic Dermatology, 2021

• A single application of a moisturizing fluid containing hyaluronic acid 1%, glycerin 5%, and Centella asiatica stem cells extract significantly increased skin hydration by 29% and reduced transepidermal water loss at 24 hours compared to baseline and an untreated control site in twenty healthy women.

  Clinical, Cosmetic and Investigational Dermatology, 2017

• Topical nicotinamide prevented solar-simulated UV-induced immunosuppression in healthy volunteers, and men experienced immunosuppression at solar-simulated UV doses three times lower than those required for women.

  The Journal of Investigative Dermatology, 2008

• Topical 5% niacinamide applied twice daily for 12 weeks reduced fine lines and wrinkles, hyperpigmented spots, red blotchiness, and skin sallowness, and improved skin elasticity compared to vehicle control in 50 female white subjects with facial photoaging.

  Dermatologic Surgery, 2005

• Topical 2% niacinamide significantly decreased sebum excretion rate in Japanese individuals and casual sebum levels in Caucasian individuals compared to placebo or baseline.

  Journal of Cosmetic and Laser Therapy, 2006

• Grapeseed oil-loaded dermocosmetic nanoemulgel applied on the cheeks of healthy volunteers significantly reduced skin melanin, erythema, sebum production, and pores while increasing moisture and elasticity compared to a placebo.

  Journal of Cosmetic Dermatology, 2022

• Topical treatment with cranberry oil and grape oil improved wound healing in rats, with cranberry oil showing an 88.1% wound area reduction and grape oil showing 84.6% compared to 74.1% in controls and 78.4% in the mupirocin standard group on day 13.

  Phytotherapy Research, 2011

• An ionic liquid-based grapeseed oil emulsion increased transdermal penetration by 4.63-fold and improved skin hydration, firmness, elasticity, and facial wrinkles after 28 days of continuous use compared to ordinary emulsion.

  Pharmaceuticals, 2024

• Topical CE Ferulic plus resveratrol BE serum following ablative fractional CO2 laser treatment reduced erythema index (308.9 vs. 325.3), shortened complete scabbing detachment time (6.0 vs. 6.5 days), decreased melanin index (-7.4% vs. +0.2%), and improved skin hydration compared to normal saline in 51 Chinese patients.

  Journal of the European Academy of Dermatology and Venereology, 2024

• Topical treatment with a combination of pyridine-2, 4-dicarboxylic acid diethyl ester and resveratrol significantly increased hair density in 79 Caucasian female subjects starting from 1.5 months compared to baseline.

  International Journal of Cosmetic Science, 2020

• A nighttime topical antioxidant containing resveratrol, baicalin, and vitamin E significantly improved fine lines, wrinkles, firmness, elasticity, laxity, hyperpigmentation, radiance, roughness, and dermal thickness in subjects with mild to moderately photodamaged skin over 12 weeks.

  Journal of Drugs in Dermatology, 2014

Why other serums fit combination skin better

• Niacinamide and ferulic acid incorporated in a stable multiple emulsion successfully reduced melanin, sebum, and skin erythema while improving skin elasticity and hydration in human skin compared to a placebo.

  BioMed Research International, 2022

• A panthenol-enriched mask improved skin hydration, regulated sebum, and reduced redness and TEWL across dry sensitive, oily sensitive, and oily acne skin subgroups with excellent tolerance and no adverse reactions.

  Journal of Cosmetic Dermatology, 2024

Ingredients

Deionized Water, Propanediol, Diglucosyl Gallic Acid, Vitis Vinifera Seed Oil Grape Seed Oil, Squalane, Glycerin, Terminalia Ferdinandiana Fruit Extract, Butyrospermum Parkii Butter Shea Butter, Dimethicone, Cyclopentasiloxane, Niacinamide, Rhodiola Rosea Extract Roseroot Extract, Argania Spinosa Kernel Oil Argan Kernel Oil, Camellia Oleifera Leaf Extract Camellia Sinensis Leaf Extract, Euterpe Oleracea Fruit Extract, Diamond Powder, Polymethylsilsesquioxane, Ethylhexylglycerin, Caprylhydroxamic Acid, Caprylyl Glycol, Parfum, Blueberry Fruit Extract, Xanthan Gum, Pullulan, Sclerotium Gum, Tetrasodium Glutamate Diacetate, Citric Acid

Behind this fit score

Lovi calculates every fit score from the full ingredient list with brand-independent rules our dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update.