Prozac Side Effects & Health Impacts

Chromium deficiency has been linked to higher cardiovascular risk because low chromium status can impair both glucose and lipid metabolism, driving compensatory hyperinsulinemia that promotes atherogenic changes over time. Studies have reported markedly lower plasma chromium levels in patients with established coronary artery disease compared with healthy controls, suggesting that inadequate chromium may be more common in people with overt atherosclerosis. Mechanistically, chromium insufficiency can worsen insulin resistance, elevate circulating insulin, and contribute to dyslipidemia, supporting the idea that unrecognized chromium deficiency may act as an upstream, modifiable risk factor in the development and progression of cardiovascular disease.

Research: Guallar E, Jiménez FJ, van 't Veer P, Bode P, Riemersma RA, Gómez-Aracena J, Kark JD, Arab L, Kok FJ, Martín-Moreno JM; EURAMIC-Heavy Metals and Myocardial Infraction Study Group. Low toenail chromium concentration and increased risk of nonfatal myocardial infarction. Am J Epidemiol. 2005 Jul 15;162(2):157-64. Bai J, Xun P, Morris S, Jacobs DR Jr, Liu K, He K. Chromium exposure and incidence of metabolic syndrome among American young adults over a 23-year follow-up: the CARDIA Trace Element Study. Sci Rep. 2015 Oct 22;5:15606. Simonoff M. Chromium deficiency and cardiovascular risk. Cardiovasc Res. 1984 Oct;18(10):591-6. Chen J, Kan M, Ratnasekera P, Deol LK, Thakkar V, Davison KM. Blood Chromium Levels and Their Association with Cardiovascular Diseases, Diabetes, and Depression: National Health and Nutrition Examination Survey (NHANES) 2015-2016. Nutrients. 2022 Jun 28;14(13):2687.

Low folate status contributes to elevated homocysteine, a metabolite that has been associated with endothelial dysfunction, arterial stiffness, and a higher risk of stroke and coronary heart disease. Large observational studies consistently show that individuals with higher homocysteine levels have greater rates of cardiovascular events, and folate intake is one of the key nutritional determinants of homocysteine. Clinically, folic acid supplementation (often combined with vitamins B6 and B12) can lower homocysteine and appears to modestly reduce stroke risk in some populations, making the identification and correction of folate deficiency an important part of broader cardiovascular risk reduction.

Research: Yanping Li, et al. Folic Acid Supplementation and the Risk of Cardiovascular Diseases: A Meta‐Analysis of Randomized Controlled Trials. Journal of the American Heart Association. Volume 5, Number 8. August 15 2016.Yi X, Zhou Y, Jiang D, Li X, Guo Y, Jiang X. Efficacy of folic acid supplementation on endothelial function and plasma homocysteine concentration in coronary artery disease: A meta-analysis of randomized controlled trials. Exp Ther Med. 2014 May;7(5):1100-1110. Kaye AD, Jeha GM, Pham AD, Fuller MC, Lerner ZI, Sibley GT, Cornett EM, Urits I, Viswanath O, Kevil CG. Folic Acid Supplementation in Patients with Elevated Homocysteine Levels. Adv Ther. 2020 Oct;37(10):4149-4164. Lonn E, Yusuf S, Arnold MJ, Sheridan P, Pogue J, Micks M, McQueen MJ, Probstfield J, Fodor G, Held C, Genest J Jr; Heart Outcomes Prevention Evaluation (HOPE) 2 Investigators. Homocysteine lowering with folic acid and B vitamins in vascular disease. N Engl J Med. 2006 Apr 13;354(15):1567-77. Wald DS, Bishop L, Wald NJ, et al. Randomized Trial of Folic Acid Supplementation and Serum Homocysteine Levels. Arch Intern Med. 2001;161(5):695–700.

Folate deficiency in the periconceptional period significantly increases the risk of neural tube defects (NTDs) such as spina bifida and anencephaly, because adequate folate is required for proper closure of the embryonic neural tube in the first month of pregnancy. Large observational datasets and randomized trials have shown that appropriate folic acid supplementation before conception and in early pregnancy can reduce NTD risk by roughly 50–70% in the general population, with even greater risk reduction in women with a prior NTD‑affected pregnancy. The practical implication is that all women of childbearing potential, not just those actively planning pregnancy, are typically advised to maintain adequate daily folic acid intake so that red‑cell folate stores are sufficient well before conception occurs.

Research: Viswanathan M, Urrutia RP, Hudson KN, Middleton JC, Kahwati LC. Folic Acid Supplementation to Prevent Neural Tube Defects: Updated Evidence Report and Systematic Review for the US Preventive Services Task Force. JAMA. 2023;330(5):460–466. Wald NJ. Folic acid and neural tube defects: Discovery, debate and the need for policy change. J Med Screen. 2022 Sep;29(3):138-146. Mathieu d'Argent E, Ravel C, Rousseau A, Morcel K, Massin N, Sussfeld J, Simon T, Antoine JM, Mandelbaume J, Daraï E, Kolanska K. High-Dose Supplementation of Folic Acid in Infertile Men Improves IVF-ICSI Outcomes: A Randomized Controlled Trial (FOLFIV Trial). J Clin Med. 2021 Apr 26;10(9):1876. Jadhav, S. N., & Pitale, D. L. (2020). Effectiveness of folic acid in unexplained infertility. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 9(9), 3780–3783.

In observational and clinical data, low chromium status has been associated with impaired insulin signaling and may contribute to the long‑term development of type 2 diabetes in susceptible individuals. Chromium acts as a cofactor that helps insulin work more efficiently at its receptor and through downstream signaling pathways, so deficiency can worsen glucose intolerance, increase circulating insulin needs, and exacerbate other metabolic risk factors over time. Population analyses have reported lower odds of having type 2 diabetes among adults who regularly consume chromium‑containing supplements compared with non‑users, though trial results remain mixed, suggesting that chromium repletion may be most relevant in people with documented deficiency or marked insulin resistance rather than as a universal preventive strategy.

Research: Anderson RA, Cheng N, Bryden NA, Polansky MM, Cheng N, Chi J, Feng J. Elevated intakes of supplemental chromium improve glucose and insulin variables in individuals with type 2 diabetes. Diabetes. 1997 Nov;46(11):1786-91. McIver DJ, Grizales AM, Brownstein JS, Goldfine AB. Risk of Type 2 Diabetes Is Lower in US Adults Taking Chromium-Containing Supplements. J Nutr. 2015 Dec;145(12):2675-82. Chen S, Jin X, Shan Z, Li S, Yin J, Sun T, Luo C, Yang W, Yao P, Yu K, Zhang Y, Cheng Q, Cheng J, Bao W, Liu L. Inverse Association of Plasma Chromium Levels with Newly Diagnosed Type 2 Diabetes: A Case-Control Study. Nutrients. 2017 Mar 17;9(3):294. Alkhalidi F. A comparative study to assess the use of chromium in type 2 diabetes mellitus. J Med Life. 2023 Aug;16(8):1178-1182.

In older adults, low folate status has been associated with a higher risk of mild cognitive impairment (MCI) and faster cognitive decline over time, likely through effects on one‑carbon metabolism and homocysteine. Several longitudinal cohort studies have found that individuals with lower serum or red‑cell folate and higher homocysteine show steeper declines on memory and global cognition tests, and in some cohorts have a significantly higher incidence of MCI or dementia over follow‑up. The clinically important takeaway is that, when folate deficiency is detected and corrected (usually along with ensuring adequate vitamin B12), some patients demonstrate stabilization or modest improvement in cognitive performance, particularly when interventions are combined with aggressive management of vascular risk factors such as hypertension and diabetes.

Research: Ma, F., Wu, T., Zhao, J. et al. Folic acid supplementation improves cognitive function by reducing the levels of peripheral inflammatory cytokines in elderly Chinese subjects with MCI. Sci Rep 6, 37486 (2016). Wang M, Fang M, Zang W. Effects of folic acid supplementation on cognitive function and inflammation in elderly patients with mild cognitive impairment: A systematic review and meta-analysis of randomized controlled trials. Arch Gerontol Geriatr. 2024 Nov;126:105540. O’Connor, D.M.A., Scarlett, S., De Looze, C. et al. Low folate predicts accelerated cognitive decline: 8-year follow-up of 3140 older adults in Ireland. Eur J Clin Nutr 76, 950–957 (2022).Putu Eka Widyadharma. Folic acid supplementation improves cognitive function: A systematic review. December 2020 Romanian Journal of Neurology 19(4):219-223.

In clinical settings, chromium deficiency has been linked to impaired glucose tolerance and emerging insulin resistance, particularly in patients on long‑term total parenteral nutrition where trace‑element provision is inadequate. Chromium functions as a cofactor that helps insulin signal more effectively at its receptor, so low chromium status can worsen post‑meal glucose excursions and increase insulin requirements despite otherwise unchanged diet or medications. Case reports and small series describe patients with unexplained hyperglycemia and neuropathic symptoms whose glucose tolerance, insulin sensitivity, and sometimes weight trajectory improved after chromium was added back to their nutrition support, underscoring that unrecognized deficiency can masquerade as primary type 2 diabetes or “idiopathic” insulin resistance.

Research: Brown RO, Forloines-Lynn S, Cross RE, Heizer WD. Chromium deficiency after long-term total parenteral nutrition. Dig Dis Sci. 1986 Jun;31(6):661-4. Anderson RA, Cheng N, Bryden NA, Polansky MM, Cheng N, Chi J, Feng J. Elevated intakes of supplemental chromium improve glucose and insulin variables in individuals with type 2 diabetes. Diabetes. 1997 Nov;46(11):1786-91. Anderson RA, Polansky MM, Bryden NA, Roginski EE, Mertz W, Glinsmann W. Chromium supplementation of human subjects: effects on glucose, insulin, and lipid variables. Metabolism. 1983 Sep;32(9):894-9. Riales R, Albrink MJ. Effect of chromium chloride supplementation on glucose tolerance and serum lipids including high-density lipoprotein of adult men. Am J Clin Nutr. 1981 Dec;34(12):2670-8. Anderson RA. Chromium and insulin resistance. Nutrition Research Reviews. 2003;16(2):267-275.

Chromium deficiency has been associated with episodes of confusion and broader cognitive impairment, particularly in patients on long‑term parenteral nutrition who also show impaired glucose tolerance and emerging insulin resistance. Case descriptions suggest that when chromium is extremely low, fluctuating blood glucose and high circulating insulin may contribute to “brain fog,” slowed processing, and difficulty concentrating, sometimes improving after chromium is added back to the nutrition regimen. While large, definitive trials on cognition are lacking, these observations raise the possibility that unrecognized chromium deficiency in people with metabolic instability could quietly worsen cognitive performance and that chromium repletion may help in deficiency states.

Research: Offenbacher, E.G. Chromium in the elderly. Biol Trace Elem Res 32, 123–131 (1992). Krikorian R, Eliassen JC, Boespflug EL, Nash TA, Shidler MD. Improved cognitive-cerebral function in older adults with chromium supplementation. Nutr Neurosci. 2010 Jun;13(3):116-22. Akhtar A, Dhaliwal J, Saroj P, Uniyal A, Bishnoi M, Sah SP. Chromium picolinate attenuates cognitive deficit in ICV-STZ rat paradigm of sporadic Alzheimer's-like dementia via targeting neuroinflammatory and IRS-1/PI3K/AKT/GSK-3β pathway. Inflammopharmacology. 2020 Apr;28(2):385-400. Orhan C, Şahin N, Tuzcu Z, Komorowski JR, Şahin K. Combined oral supplementation of chromium picolinate, docosahexaenoic acid, and boron enhances neuroprotection in rats fed a high-fat diet. Turk J Med Sci. 2017 Nov 13;47(5):1616-1625.

In some adults, chronic folate deficiency has been linked to neurological manifestations such as peripheral neuropathy, gait disturbance, and subtle to more overt cognitive impairment, especially in older age. Cohort studies have reported that low serum or red cell folate, and elevated homocysteine, correlate with worse performance on memory and executive‑function tests, and may be associated with increased risk of vascular dementia. The encouraging aspect is that, when folate deficiency is identified early and corrected alongside vitamin B12 when needed, some patients experience improvement in neuropathic symptoms and stabilization or modest gains in cognitive performance, particularly when other vascular risk factors are also addressed.

Research: Boumenna T, Scott TM, Lee JS, Palacios N, Tucker KL. Folate, vitamin B-12, and cognitive function in the Boston Puerto Rican Health Study. Am J Clin Nutr. 2021 Jan 4;113(1):179-186. Alves Maues AC, Moren Abat MG, Benlloch M, Mariscal G. Folate Supplementation for Peripheral Neuropathy: A Systematic Review. Nutrients. 2025 Oct 20;17(20):3299. Mottaghi T, Khorvash F, Maracy M, Bellissimo N, Askari G. Effect of folic acid supplementation on nerve conduction velocity in diabetic polyneuropathy patients. Neurol Res. 2019 Apr;41(4):364-368. Manzoor M, Runcie J. Folate-responsive neuropathy: report of 10 cases. Br Med J. 1976 May 15;1(6019):1176-8. Kang WB, Chen YJ, Lu DY, Yan JZ. Folic acid contributes to peripheral nerve injury repair by promoting Schwann cell proliferation, migration, and secretion of nerve growth factor. Neural Regen Res. 2019 Jan;14(1):132-139.

In pregnancy, inadequate folate status not only increases neural tube defect risk but is also associated with maternal megaloblastic anemia, which can worsen fatigue, reduce exercise tolerance, and increase the likelihood of transfusion around delivery. Observational studies have linked low folate and elevated homocysteine with a higher risk of miscarriage, placental complications, and low birth weight, and some data suggest that suboptimal folate status may contribute to certain infertility contexts, particularly when combined with other nutritional or metabolic stressors. The clinical takeaway is that maintaining sufficient folate intake before conception and throughout pregnancy is a key strategy to reduce anemia and support healthier fertility and pregnancy outcomes beyond neural tube defect prevention.

Research: Murto, T. et al. Folic acid supplementation and IVF pregnancy outcome in women with unexplained infertility. Dey M, Dhume P, Sharma SK, Goel S, Chawla S, Shah A, Madhumidha G, Rawal R. Folic acid: The key to a healthy pregnancy - A prospective study on fetomaternal outcome. Tzu Chi Med J. 2023 Oct 31;36(1):98-102. Hariz A, Bhattacharya PT. Megaloblastic Anemia. [Updated 2023 Apr 3]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2026 Jan. Lazar VMA, Rahman S, Chowdhury NH, Hasan T, Akter S, Islam MS, Ahmed S, Baqui AH, Khanam R. Folate deficiency in pregnancy and the risk of preterm birth: A nested case-control study. J Glob Health. 2024 Jul 12;14:04120. Zheng J-S, Guan Y, Zhao Y, et al. Pre-conceptional intake of folic acid supplements is inversely associated with risk of preterm birth and small-for-gestational-age birth: a prospective cohort study. British Journal of Nutrition. 2016;115(3):509-516. Reproductive BioMedicine Online, Volume 28, Issue 6, 766 - 772

Chromium plays a supporting role in insulin signaling, so insufficient levels have been linked to higher fasting blood sugar and poorer glucose tolerance in both observational and interventional studies. In some trials involving people with type 2 diabetes or impaired glucose tolerance, chromium supplementation has led to modest reductions in fasting glucose and HbA1c, particularly in those with higher baseline blood sugars. Studies suggest that maintaining adequate chromium status may help support healthier blood sugar control and reduce the likelihood of persistent hyperglycemia.

Research: Anderson RA, Cheng N, Bryden NA, Polansky MM, Cheng N, Chi J, Feng J. Elevated intakes of supplemental chromium improve glucose and insulin variables in individuals with type 2 diabetes. Diabetes. 1997 Nov;46(11):1786-91. Rajendran K, Manikandan S, Nair LD, Karuthodiyil R, Vijayarajan N, Gnanasekar R, Kapil VV, Mohamed AS. Serum Chromium Levels in Type 2 Diabetic Patients and Its Association with Glycaemic Control. J Clin Diagn Res. 2015 Nov;9(11):OC05-8. Riales R, Albrink MJ. Effect of chromium chloride supplementation on glucose tolerance and serum lipids including high-density lipoprotein of adult men. Am J Clin Nutr. 1981 Dec;34(12):2670-8. Yin RV, Phung OJ. Effect of chromium supplementation on glycated hemoglobin and fasting plasma glucose in patients with diabetes mellitus. Nutr J. 2015 Feb 13;14:14.

Chromium deficiency has been associated with impaired lipid metabolism, often showing up as elevated triglycerides and reduced HDL cholesterol on standard blood panels. In clinical studies of people with features of metabolic syndrome or type 2 diabetes, chromium supplementation has sometimes produced modest improvements in fasting triglycerides and HDL, particularly in those who were likely chromium-insufficient at baseline. These findings have led researchers to view adequate chromium status as one potential micronutrient factor in maintaining healthier lipid profiles and cardiometabolic resilience.

Research: Lima KV, Lima RP, Gonçalves MC, Faintuch J, Morais LC, Asciutti LS, Costa MJ. High frequency of serum chromium deficiency and association of chromium with triglyceride and cholesterol concentrations in patients awaiting bariatric surgery. Obes Surg. 2014 May;24(5):771-6. Ngala RA, Awe MA, Nsiah P. The effects of plasma chromium on lipid profile, glucose metabolism and cardiovascular risk in type 2 diabetes mellitus. A case - control study. PLoS One. 2018 Jul 5;13(7):e0197977. Bai, J., Xun, P., Morris, S. et al. Chromium exposure and incidence of metabolic syndrome among American young adults over a 23-year follow-up: the CARDIA Trace Element Study. Sci Rep 5, 15606 (2015). Soha Afzal, et al. Chromium Deficiency. StatPearls. June 7, 2024.

Folate deficiency has been associated with a higher risk of depressive symptoms, irritability, and other mood disturbances, likely through its role in one‑carbon metabolism, monoamine neurotransmitter synthesis, and methylation processes in the brain. Clinical and epidemiologic studies have found that people with low folate or elevated homocysteine are more likely to experience major depression, and lower folate status has been linked to poorer response to certain antidepressant medications. The encouraging clinical point is that, in folate‑deficient individuals, correcting folate status (often with folic acid or methylfolate, and alongside vitamin B12 when indicated) may improve mood symptoms and, in some cases, enhance antidepressant treatment response, especially when combined with comprehensive psychiatric and lifestyle interventions.

Research: David Mischoulon, Maurizio Fava. Folate in Depression: Efficacy, Safety, Differences in Formulations, and Clinical Issues. The Journal of Clinical Psychiatry. 2009. Gao S, Khalid A, Amini-Salehi E, Radkhah N, Jamilian P, Badpeyma M, Zarezadeh M. Folate supplementation as a beneficial add-on treatment in relieving depressive symptoms: A meta-analysis of meta-analyses. Food Sci Nutr. 2024 Mar 8;12(6):3806-3818. Reynolds EH, Crellin R, Bottiglieri T, Laundy M, Toone BK, et al. Methylfolate as Monotherapy in Depression. A Pilot Randomised Controlled Trial. J Neurol Psychol. 2015;3(1): 5. Reynolds EH. Folic acid, ageing, depression, and dementia. BMJ. 2002 Jun 22;324(7352):1512-5. Gilbody S, Lightfoot T, Sheldon T. Is low folate a risk factor for depression? A meta-analysis and exploration of heterogeneity. J Epidemiol Community Health. 2007 Jul;61(7):631-7.

Folate (folic acid) deficiency impairs DNA synthesis in rapidly dividing cells, which leads to megaloblastic anemia characterized by enlarged red blood cells, fatigue, pallor, and sometimes shortness of breath. Population studies have shown that folate deficiency and macrocytosis can be present for months before overt symptoms appear, and in some cohorts, up to roughly one quarter of anemic adults had an underlying folate or B12 deficiency rather than iron deficiency alone. The encouraging clinical point is that, once identified, folate‑responsive megaloblastic anemia often improves within weeks of adequate folic acid repletion, with reticulocyte counts rising in about 5–7 days and hemoglobin recovering more gradually over several weeks.

Research: Koury MJ, Price JO, Hicks GG. Apoptosis in megaloblastic anemia occurs during DNA synthesis by a p53-independent, nucleoside-reversible mechanism. Blood. 2000 Nov 1;96(9):3249-55. Daniel S. Socha, MD, Sherwin I. DeSouza, MD, Aron Flagg, MD, Mikkael Sekeres, MD, MS and Heesun J. Rogers, MD, PhD. Severe megaloblastic anemia: Vitamin deficiency and other causes. Cleveland Clinic Journal of Medicine March 2020, 87 (3) 153-164. H.B. Castellanos-Sinco, et al. Megaloblastic anaemia: Folic acid and vitamin B12 metabolism. Revista Médica del Hospital General de México. Vol. 78. Issue 3. Pages 105-150 (July - September 2015). Anis Hariz, et al. Megaloblastic Anemia. StatPearls April 3, 2023.