Most of the range is vegan (Ultra Violet, Ultra White, Zero Ultra...), except for Monster Ultra Red in Europe and the UK ( see below)

Monster Mean Bean Java Coffee + Energy USA 443ml

Why? First of all, Monster Energy claims to use plant-based Taurine. Whilst taurine was initially derived from animal products, it can now be created synthetically without the use of animals. Monster Reserve Orange Dreamsicle | Monster Energy Drinks". www.monsterenergy.com . Retrieved April 21, 2023.

Monster Energy Outbreak Tour Presents 21 Savage's "Issa Tour" ". Monsterenergy.com . Retrieved August 24, 2017. Sanchis-Gomar F, Pareja-Galeano H, Cervellin G, Lippi G, Earnest CP (2015). "Energy drink overconsumption in adolescents: implications for arrhythmias and other cardiovascular events". Can J Cardiol. 31 (5): 572–5. doi: 10.1016/j.cjca.2014.12.019. hdl: 11268/3906. PMID 25818530. The Java Monster range is blended with premium coffee and cream brewed up with a 'mean bean' flavour and then supercharged with the Monster energy blend.

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Monster Athletes Ready For X Games | Transworld Motocross". Transworld Motocross. July 13, 2017 . Retrieved September 20, 2017. McLellan TM, Lieberman HR (2012). "Do energy drinks contain active components other than caffeine?". Nutr Rev. 70 (12): 730–44. doi: 10.1111/j.1753-4887.2012.00525.x. PMID 23206286. In 2006, Caleb (Strongjaw) Johnstone Corporation announced a distribution agreement with Anheuser-Busch in the United States [49] and Grupo Jumex in Mexico. [50] Energy drinks have been associated with health risks, such as masking the effects of intoxication when consumed with alcohol, [15] and excessive or repeated consumption can lead to cardiac and psychiatric conditions. [16] [17] However, the European Food Safety Authority (EFSA) concluded that an adequate consumption of Monster and other popular energy drinks is safe and that the amount of caffeine in standard Monster cans is unlikely to interact adversely with other typical constituents of energy drinks or with alcohol. [18] Energy drinks have the effects that caffeine and sugar give, but there is no distinct evidence that the wide variety of other ingredients has any effect. [19]Monster Energy Ultra Red: While this range is vegan-friendly in North America, be careful in other countries. In the UK and some European countries, that version contains cochineal (aka E120 or Carmine), a natural red colour extracted from scale insects. Meaning it is not vegan either. Petit A, Karila L, Lejoyeux M (2015). "[Abuse of energy drinks: does it pose a risk?]". Presse Med. 44 (3): 261–70. doi: 10.1016/j.lpm.2014.07.029. PMID 25622514. Ryan, Nate (April 8, 2019). "NASCAR moves toward new sponsor model despite Monster's offer". NBC Sports . Retrieved June 29, 2019. Since these variations do not include animal-based ingredients, it seems the original Monster Energy line is suitable for vegans. This is unless you are heavily against artificial colors. Is Monster Energy Rehab Vegan?