Class, Health and Universe 25
OnIn the USA, and in many other developed nations, diet quality used to follow a socioeconomic gradient. Those at the top table ate a more diverse and generally healthier diet with more whole grains, lean meats, fish, low-fat dairy products, and more fresh vegetables and fruit (1, 2).
Those who sat below the salt ate foods containing more salt. Their diet also had a higher energy density, a lower nutrient density, and was crammed with more refined carbohydrates and more fats. In other words, it contained more ultra-processed foods (UPFs) (1, 2).
This is one reason why obesity is more prevalent in lower socioeconomic groups (3, 4), and why health also shows a clear socioeconomic gradient (5-7), with effects that pass beyond pregnancy and childbirth (8, 9) and reach far into the declining health prospects of the next generation (10, 11); undermining their sexuality (12, 13) and, in middle and older age, their faltering central nervous systems (14, 15).
The food landscape has changed. Thanks to the vigorous marketing of UPF’s and their universal presence, convenience and hyper-palatability, they have latterly invaded the upper socioeconomic strata (16). And as our cultural and metabolic sea walls continue to erode under this nutritional onslaught, we will see waves of disease crash higher up on the beach.
This blog fixes myopically on nutrition, but the long-term harms listed above are not solely due to diet. The perception of lower socioeconomic status is harmful in itself (17, 18), likely because it correlates with the overlapping constructs of powerlessness, loss of autonomy and social defeat (189.
These constructs are overwhelming ever more of us, as evidenced by spiralling rates of emotional distress (20, 21). The tailored boorishness of our elites, the fast-approaching singularity and the slow culling of white-collar workers with their imprecise sense of collective security are all, I believe, driving this imperfect storm.
As the storm gathers, quantity starts to acquire a quality all of its own. There is emerging evidence that as more of us succumb to the madness, it becomes harder to remain unaffected. This alarming hypothesis (22) comes out of the Department of Surgery at the University of Pittsburgh, one of many US cities tacking into a financial crisis (23) which is part of the polycrisis of our time.
The toxic modern exposome creates neuroinflammatory stress, particularly in those who eat the worst diet (24), and this increases the likelihood of irrationally aggressive behaviours (25). According to the Pittsburgh model, when the level of these behaviours reaches a critical mass among the population, the resulting social tensions spread psychological and therefore neuroinflammatory stress (26) among the bystanders, and drag increasing numbers of us into the maelstrom.
The food industry may have been the moon that started this tidal relay (ie 27), but the baton is now in other hands. Over-urbanisation, collapsing economies, mass social defeat and subsequent epigenetic mal-programming are all in the race toward a drowned world (28).
According to David Crepaz-Keay, head of research and applied learning at the UK’s Mental Health Foundation (29), “The reduction in spaces available for a ‘flight’ response increases the likelihood of a ‘fight’ response; and the stabilizing forces that tend us to equilibrium are slower than the mechanisms that translate perceived threat into elevated stress”.
Lead author of the Pittsburgh paper Professor Yoram Vodovotz adds a turn to the screw when he points out that modern technology such as the internet has broken down all the bulkheads that in an earlier age allowed escape. At NYU, Jonathan Haidt makes a broadly similar and, I think persuasive, case (30), with electronically-induced re-wiring being imposed on our children’s already nutritionally compromised brains.
Madness is thus likely contagious and certainly spreading, and we appear to be entering a pandemic phase that must eventually lead, if unchecked, to social breakdown. Welcome to Universe 26.
Universe 25 is a famous behavioral study of captive mice conducted by American ethologist John B. Calhoun, which ran between 1968 and 1970 (31). The purpose-built environment provided unlimited access to food and water, and enough space to accommodate up to 3,800 animals. After completion, 4 breeding pairs of mice were injected into this murine universe.
On the 7th day Dr Calhoun rested, and on the 8th day he took out his clipboard.
The mouse population never reached 3800. It peaked at 2,200 and, roughly 18 months in, started a slow and irreversible collapse with the colony becoming extinct at around 4 years. The experiment’s results were consistent with Calhoun’s previous findings: overpopulation leads to explosive violence and hypersexual activity, followed by asexuality, self-destruction, reproductive failure and extinction.
Calhoun was an ethologist, not a neurochemist, and I can’t help but wonder whether a significant amount of neuroinflammatory stress was involved on the way down. I’d bet good research funds on it … and I’m fairly confident that if the mice had been fed a cafeteria (pro-inflammatory) diet, the collapse would have started sooner and fallen faster.
In the spring of ‘73 my mother gave me a copy of Calhoun’s then-new JRSM paper, and we spent hours discussing the possible relevance of mice to men. In the end, we felt that this darkly fascinating future was one we would be unlikely to experience; the future was brighter in Britain’s past than it is at present. Today’s news, however, or what passes for news from the degraded MSM, increasingly seems to reinforce Calhoun’s dystopian findings.
And it fits other medical trends. The robust and continuing increase in cancer (32), for example, can be linked not only to our diet but also to increased levels of social stress, which facilitate the growth and spread of tumors (33). This stress also contributes to neurotoxicity, depression, anxiety and increasing levels of sub-clinical and clinically overt brain damage (14, 34).
Oh – and the world’s human population is on track to collapse (35).
Better nutrition cannot be the answer to all of this, but a change as small as partly replacing refined carbohydrates with fermentable ones could, even now, set us on a slightly better course, and reduce the burdens of cancer, cardiovascular and neurodegenerative disease (36-38). This is currently being considered by a major food player, and I hope to report on this next year.
In the meantime, before you take your disease to the doctor, look it up on the internet by all means – but then try reducing your internet time. Cut the cord, even if only for a day or two. Get healthier and less inflamed by taking a step back, if you can, from our simultaneously fevered and drowning world.
Next week: From Lupus to Lexus: the sound of one car crashing.
References
-
- Darmon N, Drewnowski A. Does social class predict diet quality? Am J Clin Nutr. 2008 May;87(5):1107-17.
- Monsivais P, Drewnowski A. Lower-energy-density diets are associated with higher monetary costs per kilocalorie and are consumed by women of higher socioeconomic status. J Am Diet Assoc. 2009 May;109(5):814-22.
- Zhang Q, Wang Y. Trends in the association between obesity and socioeconomic status in U.S. adults: 1971 to 2000. Obes Res. 2004 Oct;12(10):1622-32.
- Mayor S. Socioeconomic disadvantage is linked to obesity across generations, UK study finds. BMJ. 2017 Jan 10;356:j163.
- McMaughan DJ, Oloruntoba O, Smith ML. Socioeconomic Status and Access to Healthcare: Interrelated Drivers for Healthy Aging. Front Public Health. 2020 Jun 18;8:231.
- Stringhini S, Carmeli C, Jokela M, Avendaño M, McCrory C, d’Errico A, Bochud M, Barros H, Costa G, Chadeau-Hyam M, Delpierre C, Gandini M, Fraga S, Goldberg M, Giles GG, Lassale C, Kenny RA, Kelly-Irving M, Paccaud F, Layte R, Muennig P, Marmot MG, Ribeiro AI, Severi G, Steptoe A, Shipley MJ, Zins M, Mackenbach JP, Vineis P, Kivimäki M; LIFEPATH Consortium. Socioeconomic status, non-communicable disease risk factors, and walking speed in older adults: multi-cohort population based study. BMJ. 2018 Mar 23;360:k1046.
- Stringhini S, Carmeli C, Jokela M, Avendaño M, Muennig P, Guida F, Ricceri F, d’Errico A, Barros H, Bochud M, Chadeau-Hyam M, Clavel-Chapelon F, Costa G, Delpierre C, Fraga S, Goldberg M, Giles GG, Krogh V, Kelly-Irving M, Layte R, Lasserre AM, Marmot MG, Preisig M, Shipley MJ, Vollenweider P, Zins M, Kawachi I, Steptoe A, Mackenbach JP, Vineis P, Kivimäki M; LIFEPATH consortium. Socioeconomic status and the 25 × 25 risk factors as determinants of premature mortality: a multicohort study and meta-analysis of 1·7 million men and women. Lancet. 2017 Mar 25;389(10075):1229-1237.
- Nanninga EK, Menting MD, van der Hijden EJE, Portrait FRM. Do women living in a deprived neighborhood have higher maternity care costs and worse pregnancy outcomes? A retrospective population-based study. BMC Health Serv Res. 2024 Mar 20;24(1):360.
- Hesselman S, Wikström AK, Skalkidou A, Sundström-Poromaa I, Wikman A. Neighborhood deprivation and adverse perinatal outcomes in Sweden: A population-based register study. Acta Obstet Gynecol Scand. 2019 Aug;98(8):1004-1013.
- Woo JMP, Bookwalter DB, Green GY, Sandler DP. Early life socioeconomic position contributes to adult obesity independent of adult socioeconomic factors: Findings from the sister study cohort. SSM Popul Health. 2023 Nov 10;24:101556.
- Poulain T, Vogel M, Sobek C, Hilbert A, Körner A, Kiess W. Associations Between Socio-Economic Status and Child Health: Findings of a Large German Cohort Study. Int J Environ Res Public Health. 2019 Feb 26;16(5):677.
- Hansel MC, Murphy HR, Brunner J, Wang C, Miller RK, O’Connor TG, Barrett ES, Rivera-Núñez Z. Associations between neighborhood stress and maternal sex steroid hormones in pregnancy. BMC Pregnancy Childbirth. 2023 Oct 16;23(1):730.
- Ellman LM, Schetter CD, Hobel CJ, Chicz-Demet A, Glynn LM, Sandman CA. Timing of fetal exposure to stress hormones: effects on newborn physical and neuromuscular maturation. Dev Psychobiol. 2008 Apr;50(3):232-41.
- Reuben A, Richmond-Rakerd LS, Milne B, Shah D, Pearson A, Hogan S, Ireland D, Keenan R, Knodt AR, Melzer T, Poulton R, Ramrakha S, Whitman ET, Hariri AR, Moffitt TE, Caspi A. Dementia, dementia’s risk factors and premorbid brain structure are concentrated in disadvantaged areas: National register and birth-cohort geographic analyses. Alzheimers Dement. 2024 Mar 14. doi: 10.1002/alz.13727. Epub ahead of print.
- Zhang L, Sun H, Liu Z, Yang J, Liu Y. Association between dietary sugar intake and depression in US adults: a cross-sectional study using data from the National Health and Nutrition Examination Survey 2011-2018. BMC Psychiatry. 2024 Feb 8;24(1):110.
- Juul F, Parekh N, Martinez-Steele E, Monteiro CA, Chang VW. Ultra-processed food consumption among US adults from 2001 to 2018. Am J Clin Nutr. 2022 Jan 11;115(1):211-221.
- Navarro-Carrillo G, Alonso-Ferres M, Moya M, Valor-Segura I. Socioeconomic Status and Psychological Well-Being: Revisiting the Role of Subjective Socioeconomic Status. Front Psychol. 2020 Jun 10;11:1303.
- Galvan MJ, Payne BK, Hannay J, Georgeson AR, Muscatell KA. What Does the MacArthur Scale of Subjective Social Status Measure? Separating Economic Circumstances and Social Status to Predict Health. Ann Behav Med. 2023 Oct 16;57(11):929-941.
- https://drpaulclayton.eu/blog/a-cure-for-work/
- Goodwin RD, Dierker LC, Wu M, Galea S, Hoven CW, Weinberger AH. Trends in U.S. Depression Prevalence From 2015 to 2020: The Widening Treatment Gap. Am J Prev Med. 2022 Nov;63(5):726-733.
- COVID-19 Mental Disorders Collaborators. Global prevalence and burden of depressive and anxiety disorders in 204 countries and territories in 2020 due to the COVID-19 pandemic. Lancet. 2021 Nov 6;398(10312):1700-1712.
- Vodovotz Y, Arciero J, Verschure PFMJ, Katz DL. A multiscale inflammatory map: linking individual stress to societal dysfunction. Front. Sci., 11 March 2024 Vol 1 – 2023 | https://doi.org/10.3389/fsci.2023.1239462
- https://www.cbsnews.com/pittsburgh/news/pittsburgh-city-controller-major-financial-crisis-warning/
- https://drpaulclayton.eu/blog/innately-trained/
- https://drpaulclayton.eu/blog/hothead/
- Hassamal S. Chronic stress, neuroinflammation, and depression: an overview of pathophysiological mechanisms and emerging anti-inflammatories. Front Psychiatry. 2023 May 11;14:1130989.
- Chourpiliadis C, Zeng Y, Lovik A, Wei D, Valdimarsdóttir U, Song H, Hammar N, Fang F. Metabolic Profile and Long-Term Risk of Depression, Anxiety, and Stress-Related Disorders. JAMA Netw Open. 2024 Apr 1;7(4):e244525.
- https://en.wikipedia.org/wiki/The_Drowned_World (JG Ballard is one of my favourite writers. Having worked briefly in Sophia Antipolis, I recommend a dip into Super-Cannes).
- https://www.medscape.co.uk/viewarticle/can-individual-stress-lead-mass-societal-inflammation-2024a10005e5
- https://www.amazon.com/Anxious-Generation-Rewiring-Childhood-Epidemic/dp/0593655036.
- Calhoun JB. Death squared: the explosive growth and demise of a mouse population. Proc R Soc Med. 1973 Jan;66(1 Pt 2):80-8.
- Ugai T, Sasamoto N, Lee HY, Ando M, Song M, Tamimi RM, Kawachi I, Campbell PT, Giovannucci EL, Weiderpass E, Rebbeck TR, Ogino S. Is early-onset cancer an emerging global epidemic? Current evidence and future implications. Nat Rev Clin Oncol. 2022 Oct;19(10):656-673.
- He XY, Gao Y, Ng D, Michalopoulou E, George S, Adrover JM, Sun L, Albrengues J, Daßler-Plenker J, Han X, Wan L, Wu XS, Shui LS, Huang YH, Liu B, Su C, Spector DL, Vakoc CR, Van Aelst L, Egeblad M. Chronic stress increases metastasis via neutrophil-mediated changes to the microenvironment. Cancer Cell. 2024 Mar 11;42(3):474-486.e12.
- https://drpaulclayton.eu/blog/controlled-flight-into-terrain/
- https://drpaulclayton.eu/blog/crowd-control/
- Zhang L, Sun H, Liu Z, Yang J, Liu Y. Association between dietary sugar intake and depression in US adults: a cross-sectional study using data from the National Health and Nutrition Examination Survey 2011-2018. BMC Psychiatry. 2024 Feb 8;24(1):110.
- Ni Lochlainn M, Bowyer RCE, Moll JM, García MP, Wadge S, Baleanu AF, Nessa A, Sheedy A, Akdag G, Hart D, Raffaele G, Seed PT, Murphy C, Harridge SDR, Welch AA, Greig C, Whelan K, Steves CJ. Effect of gut microbiome modulation on muscle function and cognition: the PROMOTe randomised controlled trial. Nat Commun. 2024 Feb 29;15(1):1859.
- McRae MP. Dietary Fiber Is Beneficial for the Prevention of Cardiovascular Disease: An Umbrella Review of Meta-analyses. J Chiropr Med. 2017 Dec;16(4):289-299.