Moderate caloric restriction

Suggested

3 studies · 1 recommendation

Last updated: February 21, 2026

Moderate caloric restriction – Breast Cancer

Suggested3 studies

Moderate caloric restriction may lower breast cancer risk and improve survivor outcomes

Three studies involving over 2,000 participants link moderate caloric restriction to breast cancer prevention and improved post-treatment health. A case-control study of 973 matched pairs found premenopausal women eating 20% below predicted caloric needs had 64% lower breast cancer risk (OR = 0.36; 95% CI 0.21–0.63), with a dose-response pattern showing 13% increased risk per 20% caloric surplus for hormone receptor-positive tumours (p-trend < 0.001). Two RCTs in overweight breast cancer survivors demonstrated benefits of hypocaloric interventions: one showed caloric reduction significantly decreased waist circumference (β = 0.21, p = 0.002) over 12 months, while the other found a 6-month hypocaloric healthy eating and exercise program significantly reduced depressive symptoms (adjusted mean difference −3.12, p = 0.004) and improved HPA axis regulation in 85 post-treatment women. Caloric restriction within a balanced dietary framework, targeting approximately 20% reduction from predicted needs, appears beneficial both for risk reduction and survivor quality of life.

Evidence

Overeating, caloric restriction and breast cancer risk by pathologic subtype: the EPIGEICAM study

Authors: A Castello, A Goldhirsch, A Malin, AM Fair, B Lauby-Secretan, BA Simone, EH Allott, FF Zhang, GA Bray, J Vioque, M Harvie, M Kyrgiou, M Puig-Vives, MJ Dirx, MN Harvie, MN Harvie, MP Cleary, NS Sabounchi, R Peiro-Perez, RJ Elands, SA Silvera, SC Chang, SC Lucan, SD Hursting, SD Hursting, SW Lichtman, SY Pan, T Byers, V Lope, VD Longo, WC Willett

Published: January 1, 2019

In a multicenter matched case-control study of 973 case-control pairs of Spanish women (EPIGEICAM), premenopausal women consuming more than 20% below their predicted caloric needs had significantly lower breast cancer risk (OR = 0.36; 95% CI = 0.21–0.63). A clear dose-response relationship emerged: for every 20% increase in relative caloric intake (observed/predicted), risk of hormone receptor positive and HER2+ tumours increased by 13% (p-trend < 0.001 and p-trend = 0.015, respectively), while triple negative tumour risk increased by 7% per 20% increment.

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Effects of diet and exercise on weight-related outcomes for breast cancer survivors and their adult daughters: an analysis of the DAMES trial

Authors: Badr, Hoda J., Demark-Wahnefried, Wendy, Mosher, Catherine E., Sloane, Richard J., Snyder, Denise C., Tometich, Danielle B., Winger, Joseph G.

Published: April 17, 2017

In the DAMES randomized controlled trial with 50 overweight breast cancer survivors, change in caloric intake was significantly associated with change in waist circumference (β = 0.21, p = 0.002) over the 12-month intervention. The positive beta coefficient indicates that decreases in caloric intake corresponded with decreases in waist circumference. The trial used tailored mailed print interventions promoting diet and exercise compared to standard brochures. A p < 0.10 threshold was applied for this pilot study.

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Effects of an exercise and hypocaloric healthy eating intervention on indices of psychological health status, hypothalamic-pituitary-adrenal axis regulation and immune function after early-stage breast cancer : a randomised controlled trial

Authors: Coleman, R. E., Crank, Helen, Daley, A. J., Mutrie, N., Powers, H. J., Saxton, John, Scott, E. J., Woodroofe, Nicola

Published: January 1, 2014

A randomized controlled trial assigned 85 overweight women (3–18 months post early-stage breast cancer treatment) to a 6-month hypocaloric healthy eating program with individualized dietary advice and weekly nutrition seminars, combined with exercise, versus usual care. The combined intervention significantly reduced BDI-II depressive symptom scores (adjusted mean difference −3.12, 95% CI −5.26 to −1.03, P = 0.004) and improved HPA axis regulation shown by increased morning salivary cortisol (P < 0.04). Though perceived stress scale scores trended lower, the difference was not statistically significant (−2.07, 95% CI −4.96 to 0.82, P = 0.16). The dietary component included individualized caloric restriction within a healthy eating framework.

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