There are no official guidelines to assist in answering this question. I will search for relevant research papers instead.
From the Research
Overview of One Meal A Day (OMAD) for Women
- There is limited research specifically focusing on the effects of OMAD on women's health.
- However, studies on meal frequency and timing provide some insights into the potential effects of OMAD on metabolic health and weight loss.
Effects of OMAD on Metabolic Health
- A study published in 2021 1 found that eating one meal per day in the evening lowered total body mass, fat mass, and increased exercise fatty acid oxidation in lean individuals, including women.
- Another study published in 2016 2 found that altering meal frequency had little impact on body weight, plasma lipids, or glucoregulatory factors, but eating the majority of calories later in the day may be detrimental for glycemic control.
Effects of OMAD on Weight Loss
- A systematic review and meta-analysis published in 2024 3 found that time-restricted eating, including OMAD, may reduce weight compared to standard care, but the effect sizes were small and of uncertain clinical importance.
- A study published in 2013 4 found that modified alternate-day fasting, which involves eating very low calories on alternate days, facilitated weight loss and lowered cardiovascular risk factors in overweight and obese women.
Potential Risks of OMAD
- A prospective study published in 2023 5 found that eating one meal per day was associated with an increased risk of all-cause and cardiovascular disease mortality in US adults.
- However, it is essential to note that this study had a large sample size and found associations, but did not establish causation.
Considerations for Women
- More research is needed to fully understand the effects of OMAD on women's health, particularly in the long term.
- Women should consult with a healthcare professional before starting any new diet or eating pattern, including OMAD, to discuss potential benefits and risks and determine the best approach for their individual needs.