AI Article Synopsis
- Carbohydrate-restricted diets, including ketogenic diets, have established physical health benefits for chronic diseases, but their psychological effects are not thoroughly researched, which is essential for long-term sustainability.* -
- This study systematically reviewed randomized controlled trials from five databases to assess how these diets influence psychological outcomes like quality of life, mental health, mood, and fatigue among various adult populations.* -
- Findings suggest that low-carbohydrate diets do not harm psychological well-being and may offer benefits over a 12-week period, although the potential combined effects of diet with exercise or social factors were not adequately explored.*
Article Abstract
Context: Carbohydrate-restricted diets are widely used as an effective treatment tool for many chronic diseases. The impact of these diets on physical health is well known, but their impact on psychological health is less well described in the scientific literature. This is an important aspect to focus on, especially if the diets are to be sustainable in the long term.
Objective: The objective of this study was to systematically review the scientific literature describing the effect of carbohydrate-restricted diets and ketogenic diets on psychological outcomes, as observed in randomized controlled trials. Additionally, the potential synergistic effect of carbohydrate-restricted diets and exercise or social factors on these outcomes was researched.
Data Sources: Five databases (Web of Science, PubMed, Scopus, ScienceDirect, and MEDLINE Complete) were searched without restriction of publication date.
Data Extraction: The first data extraction was made in October 2020 and the second in May 2022. Abstract screening was performed by 3 independent reviewers. The quality of studies was assessed using the Jadad scale.
Data Analysis: Sixteen randomized controlled studies were included in the analysis. Five studies focused on clinical populations, 9 on obese/overweight populations, and 2 on healthy populations; all studies examined adult people. Four psychological outcomes were identified (quality of life, mental health, mood, and fatigue), and they were examined in connection with a very low-carbohydrate or ketogenic diet.
Conclusion: Daily low-carbohydrate intake may not negatively affect psychological well-being, and low-carbohydrate diets and ketogenic diets are no worse than other diets in this respect. An intervention of 12 weeks or longer can bring benefits in psychological well-being. The synergistic effect of diet and exercise or social factors was not reviewed due to lack of evidence.
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| http://dx.doi.org/10.1093/nutrit/nuad053 | DOI Listing |
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