Proper protein intake has shown to be very beneficial when attempting to lose weight.
Some of the key benefits being;
1. Its ability to aid in the preservation of lean body mass
2. Being very satiating
3. Having one of the highest thermic effects (TEF).
Below, I go over these 3 key benefits in more detail hoping to increase your knowledge on the importance of protein intake when weight loss is the goal.
Benefit 1: Preservation of lean body mass while dieting
High (but not excessive) protein intake has shown to help preserve lean mass while dieting (Edda Cava et al. 2016).
While in a caloric deficit it is very important to preserve lean muscle mass considering it is a huge determinant of RMR (resting metabolic rate) and RMR accounts for around 60-75% of Total Daily Energy Expenditure.
In short, the higher your muscle mass the higher your RMR and the higher your RMR the higher your Total Daily Energy Expenditure (which means you can have a higher caloric intake/eat more without gaining weight).
Preserving lean muscle mass while dieting is very important and high protein intake has been shown to do just that.
Benefit 2: Proteins High Satiety Effect
Protein is known for its ability to help you achieve fullness quicker (Higher protein meals and/or foods being more satiating than high carbohydrate and high fat meals/foods).
The quicker we can achieve a feeling of fullness the less food we are likely to continue eat. The less we eat, the more fat we lose (provided we are doing everything else right).
Obviously, other tips such as eating more slowly, eating an adequate amount of fiber, and possibly using smaller plates and/or bowls will need to be implemented with this adequate protein intake to have the full satiety effect.
Benefit 3: Proteins High TEF (Thermic effect of food)
Protein has a very high TEF (thermic effect of food) at around 25% (compared to Fats- 1-3% and Carbs- 6-8%).
For example, for every 100 calories of protein you eat, about 25 calories are used during the digestion process.
This has not shown to have a significant effect however it is definitely worth mentioning, considering it does effect the calories out/calories expended side of the energy balance equation (helping us achieve a negative energy balance).
In summary, protein is beneficial for weight loss in that it can;
1. Aid in preserving lean body mass while dieting
2. Protein has shown to have a high satiety factor (compared with fat and carbohydrate, less fiber).
3. Has one of the highest thermic effects of the macronutrients
Because of these benefits it would be very beneficial (for our weight loss efforts) to keep track of/be aware of our protein intake (ensuring we are getting in our proper daily intake).
Below are some general intake recommendations for protein.
General Protein Intake Recommendations
According to the Academy of Nutrition and Dietetics..
– 10-35% (~25%) of calories should come from protein.
For an individual with a daily caloric intake of 2,300 calories, 575 of those calories should come from protein. (2,300×.25=575)
– It is also recommended that around age 50, we increase our protein intake to 1g of protein per kilogram of body weight (or ~2.2g per pound) to maintain muscle mass.
For a 55 year old individual weighing 165 lbs (165÷2.2=75kg), 75g of protein would be sufficient to maintain muscle mass.
– For those that are physically active it is recommended to take in 1.2-1.7g per kilogram of bodyweight or .5-.8g per pound of body weight
For an active individual weighing 180 lbs, 90-144g would be a sufficient protein intake
Note & Disclaimer:
There are many factors that influence these numbers, (the proper intake will vary per individual) and it is very important to understand that these are only general recommendations. I am not a licensed dietitian nor a nutritionist and this article is intended for educational purposes only.