Study under review: Consumption of whole eggs promotes greater stimulation of postexercise muscle protein synthesis than consumption of isonitrogenous amounts of egg whites in young men.
Most sports nutrition research investigating the effects of protein supplementation on muscle protein synthesis (MPS) uses protein powders. Comparatively little research uses whole food sources of protein, despite the fact that people obtain most (if not all) of our protein from food.
This means that most of our protein is embedded in a food matrix with other nutrients that can affect rates of absorption and MPS. For example, previous research found that whole milk consumption can increase MPS to a greater degree than skim milk. Another protein study found that casein protein dissolved in milk was absorbed more slowly than casein dissolved in water, without affecting MPS. Another whole food study found that minced beef was absorbed more quickly than skim milk, but the milk increased MPS to a greater degree when measured within the first two hours after consumption.
A popular high-quality protein source that has yet to be investigated with regard to its benefits as a whole food is the egg. In the study under review, the MPS response was compared between whole eggs and egg whites.
Research on protein’s effects on muscle protein synthesis (MPS) tends to focus on isolated supplements, in spite of most of our protein coming from whole foods. Whole foods contain nutrients that may impact protein digestion and absorption, thereby affecting MPS. To help bridge this information gap, researchers investigated the impact of whole egg vs. egg white consumption on MPS.
Other Articles in Issue #40 (February 2018)
Interview: Gabrielle Fundaro PhD, CISSN
In this interview, we chat with researcher and weightlifter Gabrielle Fundaro about her health routine, the challenges of teaching complex biological concepts, the microbiome, and nutrition.
Interview: Andrew Gelman, PhD
In this interview, we chat about important aspects of statistics and study design with one of the luminaries in the field.
A progress report on supplements for osteoarthritis
There are a lot of supplements that are supposed to improve aspects of osteoarthritis. But what's the evidence that they actually help?
A look under the hood at carbohydrate intake during exercise
Higher carbohydrate intake during submaximal exercise can help boost performance. This study explores why.
Some TLC from ALC in depression
Acetyl-L-carnitine can pass through the blood-brain barrier more easily than L-carnitine. This meta-analysis takes a look at whether it can help with depression.
Can curcumin reduce cardiovascular risk factors?
Curcumin is thought to have multiple possible health benefits. This meta-analysis zeros in on its effects on cardiovascular risk factors.
Zinc: an alternative path away from type 2 diabetes?
Zinc may be helpful with glycemic control for people with type 2 diabetes. But can it also help with prediabetes?