Scientific Sources

Card Deck "Hormones, Cell Energy & Longevity"

This directory documents the scientific literature that forms the basis of the cards in this deck. It is organized by card theme: for each theme, you will find the relevant publications with a direct link to the original source. Relevant content statements should be traceable to verifiable, peer-reviewed journal articles. Commonly known statements are not referenced here.

The listed sources serve for scientific classification and traceability. They do not constitute medical advice and do not replace consultation with a physician. The citation of a study does not imply a claim of healing or efficacy.

Status: July 2026 · 149 References

Most Important Fundamentals

Topics: recommended exercise volume, sleep duration, social inclusion, meaning of life, nutritional quality, role of mitochondria.

  • Bull, F. C., et al. (2020). World Health Organization 2020 guidelines on physical activity and sedentary behaviour. British Journal of Sports Medicine, 54(24), 1451–1462.
  • Shailendra, P., et al. (2022). Resistance training and mortality risk: a systematic review and meta-analysis. American Journal of Preventive Medicine, 63(2), 277–285.
  • Hirshkowitz, M., et al. (2015). National Sleep Foundation's updated sleep duration recommendations. Sleep Health, 1(4), 233–243. https://doi.org/10.1016/j.sleh.2015.10.004
  • Holt-Lunstad, J., et al. (2015). Loneliness and social isolation as risk factors for mortality. Perspectives on Psychological Science, 10(2), 227–237. https://doi.org/10.1177/1745691614568352
  • Holt-Lunstad, J., et al. (2010). Social relationships and mortality risk. PLOS Medicine, 7(7), e1000316. https://doi.org/10.1371/journal.pmed.1000316
  • Cohen, R., et al. (2016). Purpose in life and its relationship to all-cause mortality and cardiovascular events. Psychosomatic Medicine, 78(2), 122–133. https://doi.org/10.1097/PSY.0000000000000274
  • Lane, M. M., et al. (2024). Ultra-processed food exposure and adverse health outcomes. BMJ, 384, e077310. https://doi.org/10.1136/bmj-2023-077310
  • Barbaresko, J., et al. (2024). Ultra-processed food consumption and human health. Critical Reviews in Food Science and Nutrition, 65(11), 1999–2007. https://doi.org/10.1080/10408398.2024.2317877
  • Brand, M. D., et al. (2013). The role of mitochondrial function and cellular bioenergetics in ageing and disease. British Journal of Dermatology, 169(Suppl. 2), 1–8. https://doi.org/10.1111/bjd.12208
  • Lanza, I. R., et al. (2010). Mitochondrial function as a determinant of life span. Pflügers Archiv – European Journal of Physiology, 459(2), 277–289.
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Biological Regulation

Topics: Allostasis and resource prioritization under stress, low-grade chronic inflammation, omega-3 and cell membrane function.

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Cholecalciferol (Sun Hormone & Gene Regulator)

Topics: VDR and gene regulation, latitude and seasonally dependent requirements, DGE and EFSA reference values, magnesium as a cofactor, vitamin K2 and calcium distribution.

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Thyroid Hormones (Metabolic Pacemakers)

Topics: thyroid hormones in energy metabolism, T4-to-T3 conversion and reverse T3, thyroid and lipid metabolism, ferritin and thyroid function.

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Insulin (Energy Distribution & Fat Storage)

Topics: insulin action and insulin resistance, vinegar and postprandial glucose response, HOMA-IR as a measure.

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Cortisol (Chronic Stress & Energy Provision)

Topics: circadian cortisol rhythm and cortisol awakening response, consequences of chronic stress, vitamin C in the adrenal gland, slow breathing and parasympathetic nervous system.

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Adrenaline (Acute Alarm & Fight/Flight)

Topics: acute stress response to psychosocial stimuli, diving reflex and heart rate, cognitive reappraisal, slow exhalation.

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Dopamine (Drive & Goal Pursuit)

Topics: reward system and receptor sensitivity, reward prediction and sub-goals, physical activity, cold exposure.

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Norepinephrine (Alertness & Focus)

Topics: Locus coeruleus activity and attention (inverted U-curve), daylight and activation, cold stimulus.

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Acetylcholine (Learning & Memory)

Topics: Attention, encoding and neuroplasticity, signal-to-noise modulation, memory consolidation during sleep, anticholinergic substances.

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GABA (Stimulus Filter & Inner Peace)

Topics: GABA as an inhibitory neurotransmitter, Vitamin B6 in GABA synthesis, Magnesium and NMDA modulation, L-Theanine and alpha activity, alcohol and GABA receptors.

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Serotonin (Satisfaction & Inner Stability)

Topics: Enteral serotonin production and separate pools, microbiome and short-chain fatty acids, tryptophan transport to the brain, kynurenine pathway, omega-3 and mood.

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Melatonin (Sleep-Wake Rhythm)

Topics: Pineal gland and internal clock, light and melatonin production, antioxidant properties, dosage issues.

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Growth Hormones (Repair & Fat Burning)

Topics: Deep sleep and GH secretion, fasting and GH, insulin and visceral fat as antagonists, heat and stress stimuli, age-related decline.

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DHEA (Stress Buffer & Hormone Precursor)

Topics: DHEA as antiglucocorticoid antagonist, DHEA-S under chronic stress, cortisol-DHEA ratio, age-related decline, glucose metabolism in muscle.

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Progesterone (Calm & Hormonal Balance)

Topics: Allopregnanolone at the GABA-A receptor, luteal phase and cycle dynamics, basal body temperature, Vitex agnus-castus for PMS.

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Testosterone (Status & Assertiveness)

Topics: Testosterone, behavior and physical characteristics; causes of low levels; zinc; strength training; diet and testosterone levels.

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Estrogens (Cycle Regulation & Neuroplasticity)

Topics: Synaptic plasticity and neurogenesis, aromatase and body fat, insulin sensitivity and fat distribution, endocrine-disrupting environmental chemicals.

  • Sheppard, P. A. S., et al. (2019). Estrogenic modulation of memory and the structural plasticity of the hippocampus. Molecular Brain, 12, 86. https://doi.org/10.1186/s13041-019-0442-7
  • Lizcano, F., et al. (2014). Estrogen deficiency and the origin of obesity during menopause. BioMed Research International, 2014, 757461. https://doi.org/10.1155/2014/757461
  • Mauvais-Jarvis, F., et al. (2013). The role of estrogens in control of energy balance and glucose homeostasis. Endocrine Reviews, 34(3), 309–338. https://doi.org/10.1210/er.2012-1055
  • Diamanti-Kandarakis, E., et al. (2009). Endocrine-disrupting chemicals: an Endocrine Society scientific statement. Endocrine Reviews, 30(4), 293–342. https://doi.org/10.1210/er.2009-0002
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Oxytocin (Bonding & Security)

Topics: Oxytocin and stress reduction through social security, cardiovascular effects, context and person dependency, group dynamics.

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Endorphins (Pain & Stress Tolerance)

Topics: endogenous opioid peptides (POMC/β-lipotropin), intense exertion and β-endorphin, social laughter and pain threshold.

  • Chrétien, M., et al. (1979). From β-lipotropin to β-endorphin and „pro-opio-melanocortin". Canadian Journal of Biochemistry, 57(9), 1111–1121. https://doi.org/10.1139/o79-143
  • Heitkamp, H. C., et al. (1993). β-endorphin and adrenocorticotropic hormone production during marathon and incremental exercise. European Journal of Applied Physiology and Occupational Physiology, 66(3), 269–274. https://doi.org/10.1007/BF00235105
  • Dunbar, R. I. M., et al. (2012). Social laughter is correlated with an elevated pain threshold. Proceedings of the Royal Society B, 279(1731), 1161–1167. https://doi.org/10.1098/rspb.2011.1373
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Endocannabinoids (Stress buffer & balancing regulator)

Topics: fatty acid origin and omega-6 to omega-3 ratio, exercise and anandamide, immune and inflammation regulation.

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Gut Microbiome (Regulatory Hub)

Topics: microbiome in health and disease, short-chain fatty acids and gut-brain axis, estrobolome and estrogen recycling.

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Nourishing Mitochondria

Topics: mitochondrial function and bioenergetics, B vitamins as cofactors in energy production.

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Mitochondrial Biogenesis

Topics: endurance training and mitochondrial biogenesis (PGC-1α), training dose, strength training in comparison.

  • Abrego-Guandique, D. M., et al. (2025). The impact of exercise on mitochondrial biogenesis in skeletal muscle: a systematic review and meta-analysis. Biomolecular Concepts, 16(1), 20250055. https://doi.org/10.1515/bmc-2025-0055
  • Bishop, D. J., et al. (2014). Can we optimise the exercise training prescription to maximise improvements in mitochondria function and content? Biochimica et Biophysica Acta – General Subjects, 1840(4), 1266–1275. https://doi.org/10.1016/j.bbagen.2013.10.012
  • Groennebaek, T., et al. (2017). Impact of resistance training on skeletal muscle mitochondrial biogenesis, content, and function. Frontiers in Physiology, 8, 713. https://doi.org/10.3389/fphys.2017.00713
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Maintaining Mitochondria

Topics: reactive oxygen species and aging, deep sleep and mitochondrial repair, B vitamins, advanced glycation end-products.

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Mitochondrial Maintenance – Smoothie

Topics: polyphenols and mitochondrial function, functional foods and healthy aging, mitochondrial DNA copy number, cocoa ingredients.

  • Gibellini, L., et al. (2015). Natural compounds modulating mitochondrial functions. Evidence-Based Complementary and Alternative Medicine, 2015, 527209. https://doi.org/10.1155/2015/527209
  • Navarro-Hortal, M. D., et al. (2023). Molecular bases for the use of functional foods in the management of healthy aging. Critical Reviews in Food Science and Nutrition, 63(33), 11967–11986. https://doi.org/10.1080/10408398.2022.2098244
  • Kim, M. B., et al. (2024). Targeting mitochondrial dysfunction by bioactive food components. Journal of Lipid and Atherosclerosis, 13(3), 306–327. https://doi.org/10.12997/jla.2024.13.3.306
  • Perri, M. R., et al. (2026). Modulation of mitochondrial DNA copy number: therapeutic potential of phytochemicals and plant extracts. Archives of Pharmacal Research. https://doi.org/10.1007/s12272-026-01620-1
  • Chidambaram, S. B., et al. (2018). Cocoa beans improve mitochondrial biogenesis via PPARγ/PGC1α dependent signalling. Nutritional Neuroscience, 23(6), 471–480. https://doi.org/10.1080/1028415X.2018.1521088
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External Stimuli for Mitochondrial Activation

Topics: passive heat (sauna) and heat shock proteins, cold and brown adipose tissue, photobiomodulation (red and near-infrared light).

  • Laukkanen, J. A., et al. (2024). The multifaceted benefits of passive heat therapies for extending the healthspan. Temperature, 11(1), 27–51. https://doi.org/10.1080/23328940.2023.2300623
  • Blondin, D. P., et al. (2014). Increased brown adipose tissue oxidative capacity in cold-acclimated humans. The Journal of Clinical Endocrinology & Metabolism, 99(3), E438–E446. https://doi.org/10.1210/jc.2013-3901
  • Hamblin, M. R. (2018). Mechanisms and mitochondrial redox signaling in photobiomodulation. Photochemistry and Photobiology, 94(2), 199–212. https://doi.org/10.1111/php.12864
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Mitochondrial Supplements – Basic

Topics: magnesium in energy metabolism, vitamin D and mitochondrial function, B vitamins.

  • Liu, M., et al. (2025). Magnesium homeostasis and magnesium transporters in human health. Nutrients, 17(5), 920. https://doi.org/10.3390/nu17050920
  • Sinha, A., et al. (2013). Improving the vitamin D status of vitamin D deficient adults is associated with improved mitochondrial oxidative function in skeletal muscle. The Journal of Clinical Endocrinology & Metabolism, 98(3), E509–E513. https://doi.org/10.1210/jc.2012-3592
  • Depeint, F., et al. (2006). Mitochondrial function and toxicity: role of the B vitamin family on mitochondrial energy metabolism. Chemico-Biological Interactions, 163(1–2), 94–112. https://doi.org/10.1016/j.cbi.2006.04.014
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Mitochondrial Supplements – Advanced

Topics: creatine for strength and cognition, coenzyme Q10 in the respiratory chain, PQQ and biogenesis, acetyl-L-carnitine, N-acetylcysteine, lutein and zeaxanthin, alpha-lipoic acid.

  • Kazeminasab, F., et al. (2025). The effects of creatine supplementation on upper- and lower-body strength and power. Nutrients, 17(17), 2748. https://doi.org/10.3390/nu17172748
  • Xu, C., et al. (2024). The effects of creatine supplementation on cognitive function in adults. Frontiers in Nutrition, 11, 1424972. https://doi.org/10.3389/fnut.2024.1424972
  • Hernández-Camacho, J. D., et al. (2018). Coenzyme Q10 supplementation in aging and disease. Frontiers in Physiology, 9, 44. https://doi.org/10.3389/fphys.2018.00044
  • Chowanadisai, W., et al. (2010). Pyrroloquinoline quinone stimulates mitochondrial biogenesis through CREB phosphorylation and increased PGC-1α expression. Journal of Biological Chemistry, 285(1), 142–152. https://doi.org/10.1074/jbc.M109.030130
  • Jones, L. L., et al. (2010). Acylcarnitines: role in brain. Progress in Lipid Research, 49(1), 61–75. https://doi.org/10.1016/j.plipres.2009.08.004
  • Medved, I., et al. (2004). N-acetylcysteine enhances muscle cysteine and glutathione availability and attenuates fatigue during prolonged exercise. Journal of Applied Physiology, 97(4), 1477–1485. https://doi.org/10.1152/japplphysiol.00371.2004
  • Merry, T. L., et al. (2016). Do antioxidant supplements interfere with skeletal muscle adaptation to exercise training? The Journal of Physiology, 594(18), 5135–5147. https://doi.org/10.1113/JP270654
  • Bernstein, P. S., et al. (2016). Lutein, zeaxanthin, and meso-zeaxanthin: the basic and clinical science underlying carotenoid-based nutritional interventions against ocular disease. Progress in Retinal and Eye Research, 50, 34–66. https://doi.org/10.1016/j.preteyeres.2015.10.003
  • Age-Related Eye Disease Study 2 (AREDS2) Research Group. (2013). Lutein + zeaxanthin and omega-3 fatty acids for age-related macular degeneration. JAMA, 309(19), 2005–2015. https://doi.org/10.1001/jama.2013.4997
  • Shay, K. P., et al. (2009). Alpha-lipoic acid as a dietary supplement: molecular mechanisms and therapeutic potential. Biochimica et Biophysica Acta – General Subjects, 1790(10), 1149–1160. https://doi.org/10.1016/j.bbagen.2009.07.026
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Systemic Control of Cellular Energy

Topics: stress and mitochondrial efficiency, thyroid and energy metabolism. For mitophagy and Urolithin A, see "Improving Metabolism".

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Improving Metabolism

Topics: fasting and metabolic switch (mTOR, autophagy, AMPK), sirtuins and NAD⁺, Urolithin A and mitophagy.

  • de Cabo, R., et al. (2019). Effects of intermittent fasting on health, aging, and disease. New England Journal of Medicine, 381(26), 2541–2551. https://doi.org/10.1056/NEJMra1905136
  • Kincaid, B., et al. (2013). Forever young: SIRT3 – a shield against mitochondrial meltdown, aging, and neurodegeneration. Frontiers in Aging Neuroscience, 5, 48. https://doi.org/10.3389/fnagi.2013.00048
  • Ryu, D., et al. (2016). Urolithin A induces mitophagy and prolongs lifespan in C. elegans and increases muscle function in rodents. Nature Medicine, 22(8), 879–888. https://doi.org/10.1038/nm.4132
  • Andreux, P. A., et al. (2019). The mitophagy activator urolithin A is safe and induces a molecular signature of improved mitochondrial and cellular health in humans. Nature Metabolism, 1(6), 595–603. https://doi.org/10.1038/s42255-019-0073-4
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Molecular Switches

Topics: mTOR and AMPK as growth and energy sensors, NRF2 and antioxidant enzymes (sulforaphane), sirtuins and DNA repair.

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Common Unfavorable Gene Variants I

Topics: MTHFR C677T and folate metabolism, PEMT and choline requirements, APOE4 and fat metabolism, CYP1A2 and caffeine degradation, glutathione peroxidases and selenium.

  • Liew, S.-C., et al. (2015). Methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism: epidemiology, metabolism and associated diseases. European Journal of Medical Genetics, 58(1), 1–10. https://doi.org/10.1016/j.ejmg.2014.10.004
  • Tan, X., et al. (2016). PEMT gene rs7946 polymorphism plays a role in risk of non-alcoholic fatty liver disease. Pharmacogenetics and Genomics, 26(2), 88–95. https://doi.org/10.1097/FPC.0000000000000193
  • Carvalho-Wells, A. L., et al. (2012). APOE genotype influences triglyceride and C-reactive protein responses to altered dietary fat intake. The American Journal of Clinical Nutrition, 96(6), 1447–1453. https://doi.org/10.3945/ajcn.112.043240
  • Cornelis, M. C., et al. (2006). Coffee, CYP1A2 genotype, and risk of myocardial infarction. JAMA, 295(10), 1135–1141. https://doi.org/10.1001/jama.295.10.1135
  • Lubos, E., et al. (2011). Glutathione peroxidase-1 in health and disease: from molecular mechanisms to therapeutic opportunities. Antioxidants & Redox Signaling, 15(7), 1957–1997. https://doi.org/10.1089/ars.2010.3586
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Common Unfavorable Gene Variants II

Topics: NOS3 and nitric oxide, DAO/AOC1 and histamine degradation, COMT Val158Met and catecholamines, MAOA and monoamines, SOD2 and mitochondrial radical defense.

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Monitoring & Biofeedback (Sleep)

Topics: Accuracy of commercial wearables in sleep tracking.

  • Robbins, R., et al. (2024). Accuracy of three commercial wearable devices for sleep tracking in healthy adults. Sensors, 24(20), 6532. https://doi.org/10.3390/s24206532
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All sources were taken from peer-reviewed journals and referenced with a link to the original publication. Please contact us if you have any questions about individual details.