Is it meat or not meat?Research refutes health claims of plant-based alternatives

Plant-based meat analogs (PBMAs) are growing in popularity, but few studies have evaluated their health effects.Recent American Journal of Clinical Nutrition The study analyzed the effects of an animal-based meat diet (ABMD) compared to a PBMA diet (PBMD) on cardiometabolic health. The study was conducted in Singapore and included adults at high risk for diabetes.

Study: Plant-based meat analogues (PBMA) and their effects on cardiometabolic health: an 8-week randomized controlled trial comparing PBMA and matched animal-based foods. Image credit: dropStock / Shutterstock

background

Plant-based diets (PBDs) have been shown to positively impact cardiometabolic health due to the presence of a wide range of bioactive components such as vitamins, dietary fiber, and carotenoids. Despite these benefits, meat consumption is deeply rooted in culture, history, and social norms, which can complicate long-term compliance by habitual omnivores.

Developed from sustainable plant-based raw materials, PBMA aims to mimic the organoleptic properties of its animal-based counterparts. Due to its increasing popularity, it is important to critically evaluate its health effects compared to a typical omnivorous diet. In particular, research on Asian diets is lacking.

About this study

To address the aforementioned gaps in the literature, the current study aimed to assess the impact of ABMD and PBMD on the cardiometabolic health of Singaporeans at high risk of type 2 diabetes mellitus (T2DM). The central hypothesis was that substitution to PBMA would improve cardiometabolic health and reduce the risk attributable to noncommunicable diseases.

This was an 8-week parallel design randomized controlled trial with 89 participants. Of these, 44 were instructed to switch to a fixed amount of PBMA, and the rest switched to meat from an animal source corresponding to PBMA. The primary outcome variable was LDL cholesterol, and secondary outcomes consisted of other risk factors for cardiometabolic disease (such as glucose and fructosamine) and dietary data. Within the subpopulation, secondary outcomes also consisted of baseline and postintervention ambulatory blood pressure measurements and 14-day continuous blood glucose monitoring.

research result

No significant effects were observed on lipid-lipoprotein profiles. However, both diets were associated with lower fructosamine and higher HOMA-β over time. No obvious differences were observed between the ABMD and PBMD groups. The results showed no clear benefit of PBMD compared to ABMD on cardiometabolic health.

The subpopulation that received blood glucose monitoring reported more effective glycemic control in the ABMD group. Ambulatory blood pressure also showed a slight improvement after ABMD but not PBMD. These findings suggest that the health benefits of PBD should not be confused with his PBMD. This is because PBMD differs from PBD in its impact on nutrition and cardiometabolic health.

When PBMA was compared to its animal-derived counterpart, significant differences were found in the macro- and micronutrient profiles. The ABMD group showed higher dietary protein and in terms of micronutrients he had more sodium in PBMA. Potassium and calcium were also found to be higher in some of his PBMAs.

The better results regarding the glycemic index in the ABMD group may have been caused by the lower carbohydrate intake and higher protein intake compared to the PBMD group. Although protein bioavailability was not evaluated here, existing studies indicate weaker absorption and digestion of PBMA proteins compared to animal-based meat. This results in differences in insulin secretion and intestinal hormone production.

The selection and evaluation of widely available and popular modern PBMAs is a key strength of this study. The intervention method was also flexible, allowing us to assess broader dietary effects after switching to PBMD. Furthermore, the highly regulated environment in which food provision and consumption took place at specific times contributed to minimizing the influence of confounding factors.

conclusion

In summary, despite the growing popularity of PBMA as an alternative protein source, the results documented here demonstrate that the cardiometabolic effects associated with PBMD are It does not support the hypothesis that the health benefits are superior.

Incorporating PBMA into the diet can affect nutritional intake and impair glycemic control. This means that the health benefits of PBD should not be confused with PBMD, as PBMD differs from PBD in terms of its impact on nutritional and cardiometabolic health.

The results documented here provide stimulation and motivation for the food industry to research and develop next-generation PBMAs with better nutritional properties and bioaccessibility. The current focus is on organoleptic properties, and expanding the scope to consider nutrition and sustainability is expected to benefit both producers and consumers.