Micronutrients & recovery
Trans fatty acids (TFAs) from industrial hydrogenation increase coronary heart disease risk and should be avoided, while naturally occurring TFAs from ruminant sources (dairy/meat) show no adverse effect or potential benefit.
Avoid industrially produced trans fats found in partially hydrogenated oils, as they increase heart disease risk. However, you do not need to avoid natural trans fats found in small amounts in dairy and meat, as they do not appear to increase risk and may even be protective.
The negative effects of trans fatty acids (TFAs) seem stronger than previously thought... Naturally, occurring MUFAs and PUFAs are in cis conformation... with the exception of some fats produced through a natural process of anaerobic bacterial fermentation in the rumen... which leads to small amounts of naturally present TFAs in milk and other dairy products.
Why this rating
Supported by multiple observational studies and meta-analyses showing increased risk for industrial TFAs, and lack of risk for natural TFAs.
Source
Dietary fats and cardiovascular health: a summary of the scientific evidence and current debate
Elena Fattore et al. · International Journal of Food Sciences and Nutrition · 2018
DOI 10.1080/09637486.2018.1455813
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This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →