Nicotinamide (Vitamin B3)

For research use only.

Catalog No.S1899 Synonyms: Niacinamide, Vitamin PP, Nicotinic acid amide

16 publications

Nicotinamide (Vitamin B3) Chemical Structure

CAS No. 98-92-0

Nicotinamide (Vitamin B3, Niacinamide, Vitamin PP, Nicotinic acid amide), a water-soluble vitamin, is an active component of coenzymes NAD and NADP, and also act as an inhibitor of sirtuins.

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10mM (1mL in DMSO) USD 130 In stock
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Selleck's Nicotinamide (Vitamin B3) has been cited by 16 publications

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  • Immunoprecipitation-western blot for analyzing acetylated Snail in Snail-transfected 293T cells (upper) and FaDu-Snail cells (lower) treated with a vehicle control (Ctrl), a HDAC inhibitor TSA 5 nM for 8 hr, a SIRT1 inhibitor NAM(Nicotinamide) 10 mM for 8 hr, or in combination.

    Cancer Cell,2014, 26(4):534-48.. Nicotinamide (Vitamin B3) purchased from Selleck.

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Biological Activity

Description Nicotinamide (Vitamin B3, Niacinamide, Vitamin PP, Nicotinic acid amide), a water-soluble vitamin, is an active component of coenzymes NAD and NADP, and also act as an inhibitor of sirtuins.
Sirtuin [1]
In vitro

Nicotinamide strongly inhibits yeast silencing, increases rDNA recombination, and shortens replicative life span to that of a sir2 mutant. Nicotinamide abolishes silencing and leads to an eventual delocalization of Sir2 even in G(1)-arrested cells, demonstrating that silent heterochromatin requires continual Sir2 activity. [1] Nicotinamide results in a twofold increase in DNA content and a threefold increase in insulin content in the fetal cells. Nicotinamide induces differentiation and maturation of human fetal pancreatic islet cells. [2] Nicotinamide regulates sirtuins by switching between deacetylation and base exchange. Nicotinamide switching is quantitated for the Sir2s from Archeaglobus fulgidus (Sir2Af2), Saccharomyces cerevisiae (Sir2p), and mouse (Sir2alpha). [3] Nicotinamide selectively reduces a specific phospho-species of tau (Thr231) that is associated with microtubule depolymerization in Alzheimer's disease transgenic mice, in a manner similar to inhibition of SirT1. Nicotinamide also dramatically increases acetylated alpha-tubulin, a primary substrate of SirT2, and MAP2c in Alzheimer's disease transgenic mice, both of which are linked to increased microtubule stability. [4] Nicotinamide fosters DNA integrity and maintains phosphatidylserine membrane asymmetry to prevent cellular inflammation, cellular phagocytosis and vascular thrombosis. Nicotinamide both prevents and reverses neuronal and vascular cell injury. [5]

Cell Data
Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
Escherichia coli BL21 (DE3) cells M{[5[mZ2dmO2aX;uJIF{e2G7 NH3RPHlKdmirYnn0bY9vKG:oIHPheIFtgXSrY3HscJkh[WO2aY\lJIh2dWGwIGPJVnQ{KChzMEKgeI8hOzl7IHHtbY5wKGGlaXTzLUBmgHC{ZYPz[YQhcW5iRYPjbIVzcWOqaXGgZ49tcSCETEKxJEhFTTNrIHPlcIx{KHW|aX7nJIZtfW:{b3flcolkKDdvYX3pco8uPC2vZYTofYxkd3WvYYLpckApSU2FKT3sZYJmdGWmIIDldJRq\GViYomg[ox2d3Knc3PlcoNmKGG|c3H5MEBKSzVyPU[uNkDPxE1? M4mzR|I2Ojd3OEK0
human SK-MEL-28 cells MX;GeY5kfGmxbjDhd5NigQ>? MnrKNVAxKM7:TR?= M2HkUFI1KGh? NWTUV2xNWmWmdXP0bY9vKGmwIFHUVEBt\X[nbDDpckBpfW2jbjDTT{1OTUxvMkigZ4VtdHNiYYSgNVAxKHWPIH3hbY51[WmwZXSgbY4hVG:la3Wnd{B{d2y3dHnvckBi\nSncjCyOEBpenNiYomgcJVkcW[ncnHz[U1j[XOnZDDhd5NigSCrbjDhZpNmdmOnIH;mJGdHKGGwZDDncJVkd3On NWjwe2VKOjJ6M{W3NVk>

... Click to View More Cell Line Experimental Data

Methods Test Index PMID
Western blot
p-MLC / MLC / p-MYPT1 / MYPT1 ; 

PubMed: 30503259     

Dose-dependent effect of nicotinamide on the phosphorylation of MYPT1 (Thr 696) and MLC (Ser 19). Individualized hESCs were treated with nicotinamide at indicated concentrations for 1 hr. Top, western blot image. Bottom, quantification of the western blot results (n = 3).

p-β-catenin / β-catenin ; 

PubMed: 30503259     

The phosphorylation of β-catenin was decreased by 10 mM nicotinamide or 5 μM CK1 inhibitor D4476 treatment for 6 hr (n = 3) as shown by western blot.

Sp1 / ERK ; 

PubMed: 18446063     

Cells were either mock-treated or treated with nicotinamide at the concentration either of 10 or 20 mM, collected at the indicated time points, and applied to Western blotting analysis.

30503259 18446063

PubMed: 30503259     

Confocal images of individualized hESCs treated with 10 mM nicotinamide (Nam) or 10 μM ROCK inhibitor Y27632 (ROCKi). Red, phalloidin 594; green, p-MLC (Ser19). Scale bar, 10 μm.

In vivo In the mouse, nicotinamide given i.p. at doses of 100-500 mg/kg showed biphasic elimination with dose-dependent changes in half-life. The initial half-life increased significantly (P <0.05) from 0.8 to 2 h and the terminal half-life increased from 3.4 to 5.6 h over the dose range studied. Clearance, however, decreased significantly from 0.3 to 0.24 L/kg/h only at the highest dose. Peak concentrations increased in a dose-dependent manner from 1,000 to 4,800 nmol/ml. The bioavailability given via the i.p. as compared with the i. v. route was close to 100%[6].


Cell Research:


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  • Cell lines: HaCaT cells
  • Concentrations: 33 μM
  • Incubation Time: 7 days and 14 days
  • Method:

    The established cell line of human epidermal keratinocytes (HaCaT cells) was routinely cultured in Dulbecco's modified Eagle medium (DMEM) containing 10% fetal bovine serum and kept in a humidified atmosphere containing 5% CO2 at 37°C. For NAD(P) modulation, cells were grown in DMEM and 10% dialyzed fetal bovine serum and with addition of 33 μM nicotinamide (33 μM Nam) or without added nicotinamide (0 μM Nam). Cell number was measured by counting. Sensitivity to glutaminase inhibition was performed using 0.1 μM 6-diazo-5-oxo-L-norleucine (DON) on cells grown in 33 μM Nam or 0 μM Nam for 7 days.

    (Only for Reference)
Animal Research:


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  • Animal Models: Mice (strain CBA/Ht/GyfBSVS)
  • Dosages: 100, 200, 300 and 500 mg/kg
  • Administration: i.p.
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 24 mg/mL (196.52 mM)
Water 24 mg/mL (196.52 mM)
Ethanol 24 mg/mL (196.52 mM)

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 122.12


CAS No. 98-92-0
Storage powder
in solvent
Synonyms Niacinamide, Vitamin PP, Nicotinic acid amide
Smiles C1=CC(=CN=C1)C(=O)N

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Clinical Trial Information

NCT Number Recruitment interventions Conditions Sponsor/Collaborators Start Date Phases
NCT04641663 Not yet recruiting Dietary Supplement: Multi-target Dietary Supplement (MTDS) Aging|Age-related Cognitive Decline Douglas Boreham|McMaster University|Northern Ontario School of Medicine January 4 2021 Not Applicable
NCT04387201 Recruiting Drug: Dulaglutide|Drug: Cyanocobalamin Glucose Intolerance|Overweight and Obesity|Drug Effect|Adiposity The University of Texas Health Science Center Houston November 18 2020 Phase 4
NCT04342975 Recruiting Drug: Nicotinamide Riboside + Pterostilbene|Drug: Placebo AKI Mayo Clinic|Elysium Health October 30 2020 Phase 2
NCT04110028 Recruiting Drug: Nicotinamide riboside|Drug: Placebo Inflammation|Acute Illness Oslo University Hospital|ChromaDex Inc. October 1 2019 Phase 1|Phase 2
NCT03975777 Recruiting Other: LO|Other: HI Mitochondrial Biogenesis Brendon Gurd PhD|Queen''s University June 1 2019 Not Applicable
NCT03870035 Not yet recruiting -- PCOS Assiut University May 1 2019 --

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID