
02/19/2025
Dark chocolate is sooooo good 😊
Eating more dark chocolate was associated with a lower risk of type 2 diabetes (T2D), according to an analysis of prospective cohort studies from Harvard University and published in the British Medical Journal.
Among participants across three studies of healthcare workers, those who consumed ≥5 servings per week of dark chocolate had a 21% lower risk of T2D compared with those who never or rarely consumed dark chocolate (P=0.006 for trend).
There was no significant association between consumption of milk chocolate and T2D, instead intake of milk chocolate was positively associated with weight gain, while this was not the case for dark chocolate.
Dark chocolate is high in polyphenols, including flavanols (part of the larger flavonoid group), and studies have shown an association between higher dietary flavonoid consumption and decreased T2D risk.
For this analysis, the authors used data from the Nurses' Health Study (NHS) and the Nurses' Health Study II (NHSII) (both all female), as well as the Health Professionals Follow-up Study (HPFS; all male). Total chocolate consumption baselines for the NHS and HPFS were in 1986, and in 1991 for the NHSII, when comprehensive food frequency questionnaires were first implemented. The second baseline, for chocolate subtype analyses, were in 2006 for the NHS and HPFS and 2007 for the NHSII, when the survey added questions about chocolate types.
Participants' diets were assessed every 4 years, with questions about average consumption of a standard portion size of chocolate in the past year. In total, 192,208 participants were included from the three trials in the total chocolate intake analysis, with 111,654 included in the analysis on chocolate types.
Standard dark chocolate is still very high in sugar and relatively low in flavanols compared to the modern 85% and 90% products. Hence if this connection is robust, the benefits of say 85% chocolate (my favourite) in protecting against diabetes are likely to be much greater.
For more information see:
https://www.medpagetoday.com/endocrinology/diabetes/113215
and
https://pubmed.ncbi.nlm.nih.gov/39631943/