Skeletal formula of spermidine
Ball and stick model of spermidine
Preferred IUPAC name
3D model (JSmol)
ECHA InfoCard 100.004.264 Edit this at Wikidata
EC Number
  • 204-689-0
MeSH Spermidine
RTECS number
  • EJ7000000
UN number 2735
  • InChI=1S/C7H19N3/c8-4-1-2-6-10-7-3-5-9/h10H,1-9H2 ☒N
Molar mass 145.250 g·mol−1
Appearance Colourless liquid
Odor Ichtyal, ammoniacal
Density 925 mg mL−1
Melting point 22 to 25 °C (72 to 77 °F; 295 to 298 K)
145 g L−1 (at 20 °C)
log P −0.504
UV-vismax) 260 nm
Absorbance 0.1
GHS labelling:
GHS05: Corrosive
P280, P305+P351+P338, P310
Flash point 112 °C (234 °F; 385 K)
Related compounds
Related amines
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Spermidine is a polyamine compound (C
) found in ribosomes and living tissues and having various metabolic functions within organisms. It was originally isolated from semen.[1]


Spermidine is an aliphatic polyamine. Spermidine synthase (SPDS) catalyzes its formation from putrescine. It is a precursor to other polyamines, such as spermine and its structural isomer thermospermine.

Spermidine synchronizes an array of biological processes, (such as Ca2+, Na+, K+ -ATPase) thus maintaining membrane potential and controlling intracellular pH and volume. Spermidine regulates biological processes, such as Ca2+ influx by glutamatergic N-methyl-D-aspartate receptor (NMDA receptor), which has been associated with nitric oxide synthase (NOS) and cGMP/PKG pathway activation and a decrease of Na+,K+-ATPase activity in cerebral cortex synaptosomes.

Spermidine is a longevity agent in mammals due to various mechanisms of action, which are just beginning to be understood. Autophagy is the main mechanism at the molecular level, but evidence has been found for other mechanisms, including inflammation reduction, lipid metabolism, and regulation of cell growth, proliferation, and death.[2][3] Spermidine has been theorized to promote autophagy via the MAPK pathway by inhibiting phosphorylation of raf,[2] or possibly by inhibiting cytosolic autophagy-related protein acetylation by EP300 and thereby increasing acetylation of tubulin.[3]

Spermidine is known to regulate plant growth, assisting the in vitro process of transcribing RNA, and inhibition of NOS. Also, spermidine is a precursor to other polyamines, such as spermine and thermospermine, some of which contribute to tolerance against drought and salinity in plants.

Spermidine has been tested and discovered to encourage hair shaft elongation and lengthen hair growth. Spermidine has also been found to “upregulate expression of the epithelial stem cell-associated keratins K15 and K19, and dose-dependently modulated K15 promoter activity in situ and the colony forming efficiency, proliferation and K15 expression of isolated human K15-GFP+ cells in vitro.”[4]

Biosynthesis of spermidine and spermine from putrescine. Ado = 5'-adenosyl.

Biochemical actions

Spermidine's known actions include:


Good dietary sources of spermidine are aged cheese, mushrooms, soy products, legumes, corn, and whole grains.[14] Spermidine is plentiful in a Mediterranean diet.[3] For comparison: The spermidine content in human seminal plasma varies between approx. 15 and 50 mg/L (mean 31 mg/L).[15]

Food Spermidine
notes & refs
Wheat germ 243 [16]
Soybean, dried 207 Japanese[14]
Cheddar, 1yr old 199 [14]
Soybean, dried 128 German[14]
Mushroom 89 Japanese[14]
Rice bran 50 [14]
Chicken liver 48 [14]
Green peas 46 [14]
Mango 30 [14]
Chickpea 29 [14]
Cauliflower (cooked) 25 [14]
Broccoli (cooked) 25 [14]

Note: spermidine content varies by source and age. See ref for details.

In grains, the endosperm contains most of the spermidine. One of the best known grain dietary sources is wheat germ, containing as much as 243 mg/kg.[16]


See also


  1. ^ American Heritage Dictionary Retrieved 2014-11-18.
  2. ^ a b Minois N (28 January 2014). "Molecular Basis of the "Anti-Aging" Effect of Spermidine and Other Natural Polyamines – A Mini-Review". Gerontology. 60 (4): 319–326. doi:10.1159/000356748. PMID 24481223.
  3. ^ a b c Madeo F, Eisenberg T, Pietrocola F, Kroemer G (2018). "Spermidine in health and disease". Science. 359 (6374): eaan2788. doi:10.1126/science.aan2788. PMID 29371440.
  4. ^ Ramot Y, Tiede S, Bíró T, Abu Bakar MH, Sugawara K, Philpott MP, Harrison W, Pietilä M, Paus R (27 July 2011). "Spermidine Promotes Human Hair Growth and Is a Novel Modulator of Human Epithelial Stem Cell Functions". PLOS ONE. 6 (7): e22564. Bibcode:2011PLoSO...622564R. doi:10.1371/journal.pone.0022564. ISSN 1932-6203. PMC 3144892. PMID 21818338.
  5. ^ Hu J, Mahmoud MI, El-Fakahany EE (1994). "Polyamines inhibit nitric oxide synthase in rat cerebellum". Neuroscience Letters. 175 (1–2): 41–5. doi:10.1016/0304-3940(94)91073-1. PMID 7526294. S2CID 37856308.
  6. ^ Wan CY, Wilkins TA (1993). "Spermidine facilitates PCR amplification of target DNA". PCR Methods and Applications. 3 (3): 208–10. doi:10.1101/gr.3.3.208. PMID 8118404.
  7. ^ Cull M, McHenry CS (1990). "Preparation of extracts from prokaryotes". Guide to Protein Purification. Methods in Enzymology. Vol. 182. pp. 147–53. doi:10.1016/0076-6879(90)82014-S. ISBN 978-0-12-182083-1. PMID 2107372.
  8. ^ Blethen SL, Boeker EA, Snell EE (1968). "Arginine decarboxylase from Escherichia coli. I. Purification and specificity for substrates and coenzyme". The Journal of Biological Chemistry. 243 (8): 1671–7. doi:10.1016/S0021-9258(18)93498-8. PMID 4870599.
  9. ^ Wu WH, Morris DR (1973). "Biosynthetic arginine decarboxylase from Escherichia coli. Subunit interactions and the role of magnesium ion". The Journal of Biological Chemistry. 248 (5): 1696–9. doi:10.1016/S0021-9258(19)44246-4. PMID 4571774.
  10. ^ Tabor CW, Tabor H (1984). "Polyamines". Annual Review of Biochemistry. 53: 749–90. doi:10.1146/annurev.bi.53.070184.003533. PMID 6206782.
  11. ^ Krug MS, Berger SL (1987). "First-strand cDNA synthesis primed with oligo(dT)". Guide to Molecular Cloning Techniques. Methods in Enzymology. Vol. 152. pp. 316–25. doi:10.1016/0076-6879(87)52036-5. ISBN 978-0-12-182053-4. PMID 2443800.
  12. ^ Karkas JD, Margulies L, Chargaff E (1975). "A DNA polymerase from embryos of Drosophila melanogaster. Purification and properties". The Journal of Biological Chemistry. 250 (22): 8657–63. doi:10.1016/S0021-9258(19)40721-7. PMID 241752.
  13. ^ Bouché JP (1981). "The effect of spermidine on endonuclease inhibition by agarose contaminants". Analytical Biochemistry. 115 (1): 42–5. doi:10.1016/0003-2697(81)90519-4. PMID 6272602.
  14. ^ a b c d e f g h i j k l Ali MA, Poortvliet E, Strömberg R, Yngve A (2011). "Polyamines in foods: development of a food database". Food Nutr Res. 55: 5572. doi:10.3402/fnr.v55i0.5572. PMC 3022763. PMID 21249159.
  15. ^ Ciba-Geigy, ed. (1977), "Sperma", Wissenschaftliche Tabellen Geigy (in German) (8 ed.), Basel: CIBA-GEIGY Limited, vol. Teilband Körperflüssigkeiten, pp. 181-189
  16. ^ a b "Brochure on Polyamines, rev. 2" (PDF). Japan: Oryza Oil & Fat Chemocial Co., Ltd. 2011-12-26. Retrieved 2013-11-06.
  17. ^ T.M. Klein, T. Gradziel, M.E. Fromm, J.C. Sanford (1988). "Factors influencing gene delivery into Zea mays cells by high–velocity microprojectiles". Nature Biotechnology. 6 (5): 559–63. doi:10.1038/nbt0588-559. S2CID 32178592.
  18. ^ Eisenberg T, Abdellatif M, Schroeder S, Primessnig U, Stekovic S, Pendl T, Harger A, Schipke J, Zimmermann A (2016). "Cardioprotection and lifespan extension by the natural polyamine spermidine". Nature Medicine. 22 (12): 1428–1438. doi:10.1038/nm.4222. PMC 5806691. PMID 27841876.
  19. ^ Eisenberg T, Knauer H, Schauer A, Büttner S, Ruckenstuhl C, Carmona-Gutierrez D, et al. (November 2009). "Induction of autophagy by spermidine promotes longevity". Nat. Cell Biol. 11 (11): 1305–14. doi:10.1038/ncb1975. PMID 19801973. S2CID 3126330.
  20. ^ "The Ultimate Spermidine Guide: Benefits, Side Effects & How To Take". Prohormones. Retrieved 2022-07-29.
  21. ^ "Polyamines on the Reproductive Landscape". academic.oup.com. Retrieved 2022-07-29.
  22. ^ Li B, Hu X, Yang Y, Zhu M, Zhang J, Wang Y, Pei X, Zhou H, Wu J (2019-09-06). "GAS5/miR-21 Axis as a Potential Target to Rescue ZCL-082-Induced Autophagy of Female Germline Stem Cells In Vitro". Molecular Therapy. Nucleic Acids. 17: 436–447. doi:10.1016/j.omtn.2019.06.012. ISSN 2162-2531. PMC 6637212. PMID 31319247.
  23. ^ Frugier M, Florentz C, Hosseini MW, Lehn JM, Giegé R (July 1994). "Synthetic polyamines stimulate in vitro transcription by T7 RNA polymerase". Nucleic Acids Res. 22 (14): 2784–90. doi:10.1093/nar/22.14.2784. PMC 308248. PMID 8052534.
  24. ^ Mertelsmann R (June 1969). "Purification and some properties of a soluble DNA-dependent RNA polymerase from nuclei of human placenta". Eur. J. Biochem. 9 (3): 311–8. doi:10.1111/j.1432-1033.1969.tb00610.x. PMID 5795512.