Low-calorie diets may negatively impact mental health
Yes, research suggests that low-calorie diets (especially very restrictive ones) may have negative effects on mental health, including increased stress, anxiety, irritability, and even depression. Here’s why:
How Low-Calorie Diets May Harm Mental Health
- Nutrient Deficiencies – Severely cutting calories can lead to low levels of:
- B vitamins (important for mood regulation)
- Omega-3s (linked to reduced depression risk)
- Magnesium & Zinc (affect stress and neurotransmitter function)
- Hormonal Changes – Extreme calorie restriction can:
- Lower serotonin (the “feel-good” hormone)
- Increase cortisol (stress hormone), worsening anxiety
- Brain Fuel Shortage – The brain relies on glucose, and very low-calorie diets (especially low-carb) may lead to:
- Brain fog
- Fatigue
- Mood swings
- Psychological Effects – Strict dieting can lead to:
- Food obsession (increased cravings)
- Guilt & shame around eating
- Higher risk of disordered eating
Who’s Most at Risk?
- People with a history of anxiety, depression, or eating disorders
- Those on very low-calorie diets (<1,200 kcal/day for women, <1,500 kcal/day for men)
- Long-term dieters with yo-yo weight fluctuations
Healthier Alternatives
✔ Moderate calorie deficit (e.g., 300–500 kcal below maintenance)
✔ Balanced macros (enough protein, healthy fats, and fiber)
✔ Mindful eating (not overly restrictive)
✔ Regular meals (avoiding extreme hunger.
While weight loss can benefit physical health, extreme calorie restriction often backfires mentally. A sustainable, nutrient-rich diet is better for both body and mind.
Reference:
https://www.medicalnewstoday.com/articles/low-calorie-diets-may-negatively-impact-mental-health
https://edition.cnn.com/2025/06/03/health/diet-calories-depression-wellness
https://pmc.ncbi.nlm.nih.gov/articles/PMC4790398
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https://mygenericpharmacy.com/category/disease/mental-health