{"id":12446,"date":"2026-02-19T11:45:31","date_gmt":"2026-02-19T14:45:31","guid":{"rendered":"https:\/\/www.robertofrancodoamaral.com.br\/blog\/?p=12446"},"modified":"2026-02-19T18:43:22","modified_gmt":"2026-02-19T21:43:22","slug":"luz-solar-hormonios-humor","status":"publish","type":"post","link":"https:\/\/www.robertofrancodoamaral.com.br\/blog\/luz-solar-hormonios-humor\/","title":{"rendered":"Como a Luz Solar Influencia os Horm\u00f4nios, Energia e o Humor?"},"content":{"rendered":"
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Como a exposi\u00e7\u00e3o solar influencia horm\u00f4nios al\u00e9m da vitamina D?<\/h1>\n<\/div>\n
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________________________________________________________________________<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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A luz solar regula v\u00e1rios eixos hormonais al\u00e9m da vitamina D, via retina\u2013SCN (rel\u00f3gio central) e tamb\u00e9m por um \u201csistema neuroend\u00f3crino cut\u00e2neo\u201d ativado por UV, com efeitos sist\u00eamicos mensur\u00e1veis\u00a0[1]<\/span>1<\/span><\/span>[2]<\/span>2<\/span><\/span><\/p>\n

Melatonina e ciclo circadiano:<\/strong><\/span><\/h3>\n

A luz BLOQEIA rapidamente a melatonina noturna: quedas come\u00e7am em ~5\u201318 minutos sob luz intensa, com recupera\u00e7\u00e3o lenta quando a luz cessa\u00a0\u00a0A luz da manh\u00e3 reduz melatonina e alinha ritmos, enquanto aus\u00eancia de luz (p.ex., ambientes sem janela) associa-se a melatonina mais baixa \u00e0 noite e pior sono\/humor<\/p>\n

Exposi\u00e7\u00e3o ocular, n\u00e3o \u201cextraocular\u201d na pele, \u00e9 necess\u00e1ria para fasear ritmos de melatonina\/cortisol<\/p>\n

Cortisol e eixo HPA (adrenal)<\/strong> :<\/span><\/h3>\n

Transi\u00e7\u00f5es de luz fraca para forte no in\u00edcio da manh\u00e3 elevam cortisol imediatamente (>50%) e modulam alerta; efeitos dependem do hor\u00e1rio e do espectro, com azul\/verde produzindo aumentos maiores que vermelho\u00a0\u00a0De manh\u00e3, luz intensa e azul aumentam cortisol salivar versus luz fraca\/vermelha; a intensidade importa<\/p>\n

\u00c0 noite, a luz gera padr\u00f5es distintos de ativa\u00e7\u00e3o\/inibi\u00e7\u00e3o do cortisol conforme dura\u00e7\u00e3o e intermit\u00eancia da exposi\u00e7\u00e3o<\/p>\n

Serotonina, humor e SOL:<\/strong><\/span><\/h3>\n

A luz diurna est\u00e1 ligada a maior libera\u00e7\u00e3o central de serotonina e melhor humor; redu\u00e7\u00e3o sazonal de luz relaciona-se a queda de serotonina e depress\u00e3o sazonal .<\/p>\n

Em humanos, UVA pode elevar transitoriamente serotonina s\u00e9rica e reduzir melatonina, com melhora subjetiva de equil\u00edbrio\/ansiedade, sugerindo via cut\u00e2nea al\u00e9m da retina<\/p>\n

Eixos cut\u00e2neos e esteroides sexuais<\/strong><\/span><\/h3>\n

RAIOP\u00a0 UVB ativam no pele um \u201cHPA cut\u00e2neo\u201d (CRH, POMC, ACTH, \u03b2\u2011endorfina) e produ\u00e7\u00e3o local de cortisol, com sinais que podem alcan\u00e7ar o eixo central; efeitos variam por comprimento de onda\u00a0\u00a0A<\/p>\n

A pele tamb\u00e9m sintetiza precursores esteroides (via CYP11A1), modulados por UVB, potencialmente influenciando horm\u00f4nios sist\u00eamicos\u00a0\u00a0Em modelos murinos e dados humanos observacionais, UVB aumentou horm\u00f4nios sexuais e correlacionou-se com maior testosterona\/agressividade\/paix\u00e3o, implicando um eixo pele\u2011c\u00e9rebro\u2011g\u00f4nadas mediado por p53 epid\u00e9rmico<\/p>\n

Em mulheres p\u00f3s\u2011menopausa, maior UVR associou-se a estrog\u00eanios mais baixos e gonadotrofinas mais altas, indicando que UV pode alterar o balan\u00e7o reprodutivo<\/p>\n

Em s\u00edntese, a luz solar influencia melatonina (sono), cortisol (estresse\/ritmos), serotonina (humor) e at\u00e9 esteroides sexuais atrav\u00e9s de vias oculares e cut\u00e2neas, al\u00e9m da cl\u00e1ssica produ\u00e7\u00e3o de vitamina D\u00a0[2]<\/span>2<\/span><\/span><\/p>\n

_____________________________________________________________________________________<\/p>\n

COMO A LUZ PELA MANHA INFLUENCIA O CORTISOL?<\/strong><\/span><\/h2>\n<\/div>\n
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A luz azul de manh\u00e3 pode aumentar a resposta de despertar do cortisol, especialmente quando a exposi\u00e7\u00e3o \u00e9 brilhante e nas primeiras 1\u20133 horas ap\u00f3s acordar, em compara\u00e7\u00e3o com luz fraca ou vermelha [1]<\/span>1<\/span><\/span>[2]<\/span>2<\/span>.<\/span><\/p>\n

Em estudos controlados, luz azul ou azul\u2011enriquecida elevou a \u00e1rea sob a curva do cortisol e a sensibilidade da resposta, indicando maior produ\u00e7\u00e3o e subida mais acentuada ap\u00f3s o despertar<\/p>\n

A intensidade importa: luz brilhante aumenta o cortisol mais do que luz fraca, e espectros com mais componentes de onda curta (azul\/verde) tendem a provocar respostas maiores do que vermelho\u00a0[1]<\/span>1<\/span><\/span>[2]<\/span>2<\/span><\/span><\/p>\n

O que os dados mostram:<\/strong><\/span><\/p>\n

    \n
  • Compara\u00e7\u00f5es espectrais:<\/strong>\u00a0Exposi\u00e7\u00e3o p\u00f3s\u2011despertar a azul\/verde elevou o CAR versus vermelho; efeitos consistentes em desenhos cruzados com 1 hora de luz<\/li>\n
  • Magnitude\/\u00e1rea:<\/strong>\u00a0Maior sa\u00edda total (AUCg, \u00e1rea sob a curva \u201cground\u201d) e maior aumento (AUCi) com azul, sugerindo impacto tanto no total quanto na din\u00e2mica da resposta<\/li>\n
  • Intensidade:<\/strong>\u00a0Luz brilhante provoca os n\u00edveis mais altos de cortisol versus luz fraca, vermelha ou azul de baixa intensidade, destacando o papel da ilumin\u00e2ncia al\u00e9m do espectro<\/li>\n
  • Contexto adicional:<\/strong>\u00a0Em manh\u00e3s com luz azul\u2011enriquecida, altera\u00e7\u00f5es metab\u00f3licas ocorrem sem diferen\u00e7as claras no cortisol entre manh\u00e3 e noite em alguns protocolos; por\u00e9m a literatura sistem\u00e1tica conclui aumento do cortisol em manh\u00e3s com luz brilhante rica em azul\/verde<\/li>\n<\/ul>\n

    Em s\u00edntese, luz azul matinal, especialmente brilhante, tende a amplificar o pico fisiol\u00f3gico de cortisol do despertar, com efeitos quantific\u00e1veis na \u00e1rea e no gradiente da resposta<\/p>\n

     <\/p>\n\n\n\n\n\n\n\n\n\n
    Aspecto Avaliado<\/strong><\/th>\nO que foi comparado<\/strong><\/th>\nO que os dados mostram<\/strong><\/th>\nInterpreta\u00e7\u00e3o Cl\u00ednica\/Fisiol\u00f3gica<\/strong><\/th>\n<\/tr>\n<\/thead>\n
    Compara\u00e7\u00f5es espectrais<\/strong><\/td>\nLuz azul\/verde vs. luz vermelha (1h p\u00f3s-despertar, desenhos cruzados)<\/td>\nAzul\/verde aumentam o CORTISOL em rela\u00e7\u00e3o ao vermelho<\/td>\nEspectros de menor comprimento de onda estimulam mais fortemente o eixo HPA no in\u00edcio da manh\u00e3<\/td>\n<\/tr>\n
    Magnitude total (AUCg)<\/strong><\/td>\n\u00c1rea total sob a curva de cortisol<\/td>\nMaior AUCg com luz azul<\/td>\nAumenta a produ\u00e7\u00e3o total de cortisol no per\u00edodo avaliado<\/td>\n<\/tr>\n
    Din\u00e2mica da resposta (AUCi)<\/strong><\/td>\nIncremento da resposta ap\u00f3s despertar<\/td>\nMaior AUCi com luz azul<\/td>\nIntensifica a velocidade e amplitude da resposta ao despertar<\/td>\n<\/tr>\n
    Intensidade luminosa<\/strong><\/td>\nLuz brilhante vs. luz fraca, vermelha ou azul de baixa intensidade<\/td>\nLuz brilhante gera os n\u00edveis mais altos de cortisol<\/td>\nA ilumin\u00e2ncia \u00e9 fator determinante, al\u00e9m do espectro<\/td>\n<\/tr>\n
    Contexto metab\u00f3lico<\/strong><\/td>\nManh\u00e3s com luz azul-enriquecida<\/td>\nAltera\u00e7\u00f5es metab\u00f3licas observadas; alguns protocolos n\u00e3o mostram diferen\u00e7a clara manh\u00e3 vs. noite<\/td>\nApesar de varia\u00e7\u00f5es metodol\u00f3gicas, revis\u00f5es sistem\u00e1ticas indicam aumento do cortisol com luz brilhante rica em azul\/verde<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    \n
    _________________________________________________________________________<\/div>\n<\/div>\n

     <\/p>\n

    REFER\u00caNCIAS BIBLIOGRAFICAS<\/strong><\/p>\n<\/div>\n

    [1] Slominski et al., “How UV Light Touches the Brain and Endocrine System Through Skin, and Why.”,
    \nEndocrinology (2018).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/29546369\/<\/p>\n

    [2] Slominski et al., “Photo-neuro-immuno-endocrinology: How the ultraviolet radiation regulates the body, brain, and immune system.”,
    \nProceedings of the National Academy of Sciences of the United States of America (2024).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/38489380\/<\/p>\n

    [3] Skobowiat et al., “Cutaneous hypothalamic-pituitary-adrenal axis homolog: regulation by ultraviolet radiation.”,
    \nAmerican journal of physiology. Endocrinology and metabolism (2011).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/21673307\/<\/p>\n

    [4] Rahman et al., “Characterizing the temporal Dynamics of Melatonin and Cortisol Changes in Response to Nocturnal Light Exposure.”,
    \nScientific reports (2019).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/31873098\/<\/p>\n

    [5] Campbell and Jialal, “Physiology, Endocrine Hormones”,
    \nStatPearls Publishing (2022).
    \nhttps:\/\/www.ncbi.nlm.nih.gov\/books\/n\/statpearls\/article-814\/<\/p>\n

    [6] Harb et al., “Lack of exposure to natural light in the workspace is associated with physiological, sleep and depressive symptoms.”,
    \nChronobiology international (2015).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/25424517\/<\/p>\n

    [7] Lindblom et al., “No evidence for extraocular light induced phase shifting of human melatonin, cortisol and thyrotropin rhythms.”,
    \nNeuroreport (2000).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/10757506\/<\/p>\n

    [8] Leproult et al., “Transition from dim to bright light in the morning induces an immediate elevation of cortisol levels.”,
    \nThe Journal of clinical endocrinology and metabolism (2001).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/11231993\/<\/p>\n

    [9] Robertson-Dixon et al., “The Influence of Light Wavelength on Human HPA Axis Rhythms: A Systematic Review.”,
    \nLife (Basel, Switzerland) (2023).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/37895351\/<\/p>\n

    [10] Petrowski et al., “The effects of light exposure on the cortisol stress response in human males.”,
    \nStress (Amsterdam, Netherlands) (2021).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/32160826\/<\/p>\n

    [11] Petrowski et al., “Increase in cortisol concentration due to standardized bright and blue light exposure on saliva cortisol in the morning following sleep laboratory.”,
    \nStress (Amsterdam, Netherlands) (2021).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/32723201\/<\/p>\n

    [12] Munir and Abbas, “Seasonal Depressive Disorder”,
    \nStatPearls Publishing (2023).
    \nhttps:\/\/www.ncbi.nlm.nih.gov\/books\/n\/statpearls\/article-126883\/<\/p>\n

    [13] Munir and Abbas, “Seasonal Depressive Disorder”,
    \nStatPearls Publishing (2023).
    \nhttps:\/\/www.ncbi.nlm.nih.gov\/books\/n\/statpearls\/article-126883\/<\/p>\n

    [14] Gambichler et al., “Impact of UVA exposure on psychological parameters and circulating serotonin and melatonin.”,
    \nBMC dermatology (2002).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/11952999\/<\/p>\n

    [15] Jozic et al., “Skin under the (Spot)-Light: Cross-Talk with the Central Hypothalamic-Pituitary-Adrenal (HPA) Axis.”,
    \nThe Journal of investigative dermatology (2015).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/25964265\/<\/p>\n

    [16] Slominski et al., “On the role of skin in the regulation of local and systemic steroidogenic activities.”,
    \nSteroids (2015).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/25988614\/<\/p>\n

    [17] Parikh et al., “Skin exposure to UVB light induces a skin-brain-gonad axis and sexual behavior.”,
    \nCell reports (2021).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/34433056\/<\/p>\n

    [18] Triebner et al., “Ultraviolet radiation as a predictor of sex hormone levels in postmenopausal women: A European multi-center study (ECRHS).”,
    \nMaturitas (2021).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/33541562\/<\/p>\n

    __________________________________________________________________<\/p>\n

    COMO A LUZ PELA MANHA INFLUENCIA O CORTISOL?<\/strong><\/span><\/h5>\n

    Leproult et al., “Transition from dim to bright light in the morning induces an immediate elevation of cortisol levels.”,
    \nThe Journal of clinical endocrinology and metabolism (2001).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/11231993\/<\/p>\n

    [2] Scheer and Buijs, “Light affects morning salivary cortisol in humans.”,
    \nThe Journal of clinical endocrinology and metabolism (1999).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/10487717\/<\/p>\n

    [3] Petrowski et al., “The effects of post-awakening light exposure on the cortisol awakening response in healthy male individuals.”,
    \nPsychoneuroendocrinology (2019).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/31220690\/<\/p>\n

    [4] Mekschrat et al., “IL-6 after wake-up in human males: Exposure to red versus blue light and the interplay with cortisol.”,
    \nBrain, behavior, & immunity – health (2024).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/39252985\/<\/p>\n

    [5] Petrowski et al., “The inflammatory immune system after wake up in healthy male individuals: A highly standardized and controlled study.”,
    \nBrain, behavior, & immunity – health (2022).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/36093437\/<\/p>\n

    [6] Robertson-Dixon et al., “The Influence of Light Wavelength on Human HPA Axis Rhythms: A Systematic Review.”,
    \nLife (Basel, Switzerland) (2023).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/37895351\/<\/p>\n

    [7] Petrowski et al., “Increase in cortisol concentration due to standardized bright and blue light exposure on saliva cortisol in the morning following sleep laboratory.”,
    \nStress (Amsterdam, Netherlands) (2021).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/32723201\/<\/p>\n

    [8] Petrowski et al., “The effects of light exposure on the cortisol stress response in human males.”,
    \nStress (Amsterdam, Netherlands) (2021).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/32160826\/<\/p>\n

    [9] Clodor\u00e9 et al., “Psychophysiological effects of early morning bright light exposure in young adults.”,
    \nPsychoneuroendocrinology (1990).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/2255748\/<\/p>\n

    [10] Foret et al., “Effect of morning bright light on body temperature, plasma cortisol and wrist motility measured during 24 hour of constant conditions.”,
    \nNeuroscience letters (1993).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/8377945\/<\/p>\n

    [11] Lemmer et al., “Effects of bright light on circadian patterns of cyclic adenosine monophosphate, melatonin and cortisol in healthy subjects.”,
    \nEuropean journal of endocrinology (1994).
    \nhttps:\/\/pubmed.ncbi.nlm.nih.gov\/8180675\/<\/p>\n","protected":false},"excerpt":{"rendered":"

    Como a exposi\u00e7\u00e3o solar influencia horm\u00f4nios al\u00e9m da vitamina D? ________________________________________________________________________ A luz solar regula v\u00e1rios eixos hormonais al\u00e9m da vitamina D, via retina\u2013SCN (rel\u00f3gio central) e tamb\u00e9m por um \u201csistema neuroend\u00f3crino cut\u00e2neo\u201d ativado por UV, com efeitos sist\u00eamicos mensur\u00e1veis\u00a0[1]1[2]2 Melatonina e ciclo circadiano: A luz BLOQEIA rapidamente a melatonina noturna: quedas come\u00e7am em ~5\u201318 […]<\/p>\n","protected":false},"author":4,"featured_media":12451,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[654,656,661],"tags":[],"yoast_head":"\nComo a Luz Solar Influencia os Horm\u00f4nios, Energia e o Humor? - Dr. Roberto Franco do Amaral Neto<\/title>\n<meta name=\"description\" content=\"Descubra como a luz solar regula melatonina, cortisol, serotonina e horm\u00f4nios sexuais atrav\u00e9s da retina e da pele, al\u00e9m da vitamina D.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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