I can’t tell you why except they showed up on a wiki search.

Climate change has a negative effect on this bird, and reproductive performance decreases with increased temperatures.

•  Sydeman, William J; Hester, Michelle M; Thayer, Julie A; Gress, Franklin; Martin, Paige; Buffa, Joelle (2001). “Climate change, reproductive performance and diet composition of marine birds in the southern California current system, 1969–1997”. Progress in Oceanography. 49 (1–4): 309–329. Bibcode:2001PrOce..49..309S. doi:10.1016/S0079-6611(01)00028-3. ISSN 0079-6611.

It is also particularly vulnerable to oil, and adults near oiled shores display symptoms of hepatocellular injury, where elevated levels of aspartate aminotransferase can be found in the liver. Otherwise, the effects of oil spills on the pigeon guillemot are unclear.

• Oakley, K. L.; Kuletz, Kathy J. (1996). “Population, reproduction and foraging of pigeon guillemots at Naked Island, Alaska, before and after the Exxon Valdez oil spill”. American Fisheries Society Symposium. 18: 759–769. ISSN 0892-2284.
• Seiser, Pamela E; Duffy, Lawrence K; David McGuire, A; Roby, Daniel D; Golet, Gregory H; Litzow, Michael A (2000). “Comparison of pigeon guillemot, Cepphus columba, blood parameters from oiled and unoiled areas of Alaska eight years after the Exxon Valdez Oil Spill”. Marine Pollution Bulletin. 40 (2): 152–164. doi:10.1016/S0025-326X(99)00194-0. ISSN 0025-326X.
• Nettleship, D.N. (2017). Pigeon Guillemot (Cepphus columba). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from http://www.hbw.com/node/54064 on 19 March 2017).

Unlike some seabirds, ingestion of plastic does not seem to be a problem for this species.

• Avery-Gomm, S.; Provencher, J.F.; Morgan, K.H.; Bertram, D.F. (July 2013). “Plastic ingestion in marine-associated bird species from the eastern North Pacific”. Marine Pollution Bulletin. 72 (1): 257–259. doi:10.1016/j.marpolbul.2013.04.021. PMID 23683586.

https://en.wikipedia.org/wiki/Pigeon_guillemot

And the “food” is not good for rodents either

Chronic aspartame intake causes changes in the trans-sulphuration pathway, glutathione depletion and liver damage in mice

Mice were divided into three groups: control; treated daily with aspartame for 90 days; and treated with aspartame plus N-acetylcysteine (NAC).

Chronic administration of aspartame increased plasma alanine aminotransferase (ALT) and aspartate aminotransferase activities and caused liver injury as well as marked decreased hepatic levels of reduced glutathione (GSH), oxidized glutathione (GSSG), γ-glutamylcysteine ​​(γ-GC), and most metabolites of the trans-sulphuration pathway, such as cysteine, S-adenosylmethionine (SAM), and S-adenosylhomocysteine ​​(SAH). Aspartame also triggered a decrease in mRNA and protein levels of the catalytic subunit of glutamate cysteine ligase (GCLc) and cystathionine γ-lyase, and in protein levels of methionine adenosyltransferase 1A and 2A. N-acetylcysteine prevented the aspartame-induced liver injury and the increase in plasma ALT activity as well as the decrease in GSH, γ-GC, cysteine, SAM and SAH levels and GCLc protein levels. In conclusion, chronic administration of aspartame caused marked hepatic GSH depletion, which should be ascribed to GCLc down-regulation and decreased cysteine levels. Aspartame triggered blockade of the trans-sulphuration pathway at two steps, cystathionine γ-lyase and methionine adenosyltransferases. NAC restored glutathione levels as well as the impairment of the trans-sulphuration pathway. Keywords: Aspartame, Cysteine, S-adenosylmethionine, N–acetylcysteine

Finamor I, Pérez S, Bressan CA, et al. Chronic aspartame intake causes changes in the trans-sulphuration pathway, glutathione depletion and liver damage in mice. Redox Biol. 2017;11:701-707. doi:10.1016/j.redox.2017.01.019

What is NAC?

Acetylcysteine, also known as N-acetylcysteine (NAC), is a medication that is used to treat acetaminophen overdose and to loosen thick mucus in individuals with chronic bronchopulmonary disorders like pneumonia and bronchitis. It has been used to treat lactobezoar in infants. It can be taken intravenously, by mouth, or inhaled as a mist. Some people use it as a dietary supplement. (Wikipedia)

• “Acetylcysteine”. The American Society of Health-System Pharmacists. Archived from the original on 23 September 2015. Retrieved 22 August 2015.
• Talbott, Shawn M. (2012). A Guide to Understanding Dietary Supplements. Routledge. p. 469. ISBN 9781136805707. Archived from the original on 8 September 2017.
• “Cysteine”. University of Maryland Medical Center. Archived from the original on 1 July 2017. Retrieved 23 June 2017.

COVID-19

The World Health Organization (WHO) declared the outbreak a public health emergency of international concern on 30 January 2020 and a pandemic on 11 March 2020. As of 15 August 2022, the pandemic had caused more than 590 million cases and 6.43 million confirmed deaths, making it one of the deadliest in history. (Wikipedia)

NAC is being considered as a possible treatment for COVID-19. (Wikipedia)

• “N-Acetylcysteine as Adjuvant Therapy for COVID-19 – A Perspective on the Current State of the Evidence”.
• “N-acetyl-cysteine reduces the risk for mechanical ventilation and mortality in patients with COVID-19 pneumonia: a two-center retrospective cohort study”.
• “Therapeutic potential of N-acetyl cysteine during COVID-19 epoch”.

In July 2020, FDA sent warning letters to companies declaring that NAC is not a lawful dietary ingredient per the FD&C Act’s drug-exclusion clause because the ingredient was first authorized for investigation as a new drug before it was marketed as a dietary supplement. Dec 7, 2021

NPA sues FDA for trying to ban NAC supplements, warns industry …

Is NAC illegal now?

The FDA claims that there’s no evidence that NAC was used as a supplement prior to its use as a drug – so including NAC in a supplement makes the product an unapproved drug and thus illegal.

N-Acetyl Cysteine: Supplement, Drug, or Both? – Natural Medicines

Is NAC now banned?

In a March 31, 2022 Constituent Update, FDA announced it has confirmed that NAC is excluded from the definition of a dietary supplement.Apr 4, 2022

FDA Confirms NAC is Excluded From Dietary Supplement Definition

What is a racket?

an organized illegal activity, such as bootlegging or the extortion of money from legitimate business people by threat or violence. a dishonest scheme, trick, business, activity, etc.: the latest weight-reducing racket. (Dictionary.com)

On October 15, 1970, the Racketeer Influenced and Corrupt Organizations Act (18 U.S.C. §§ 1961–1968), commonly referred to as the “RICO Act”, became United States law. The RICO Act allowed law enforcement to charge a person or group of people with racketeering, defined as committing multiple violations of certain varieties within a ten-year period. The purpose of the RICO Act was stated as “the elimination of the infiltration of organized crime and racketeering into legitimate organizations operating in interstate commerce“. S.Rep. No. 617, 91st Cong., 1st Sess. 76 (1968). However, the statute is sufficiently broad to encompass illegal activities relating to any enterprise affecting interstate or foreign commerce. Under the law, the meaning of racketeering activity is set out at 18 U.S.C. § 1961.(Wikipedia)

https://en.wikipedia.org/wiki/Title_21_of_the_United_States_Code

This seems ridiculously simple. Hm…