Fasting & Nutrition Tool
Protein Intake Calculator
Estimate target protein grams using active metabolic equations, complete with whole food equivalent visualization.
ShiftVitals
Daily Protein Target
Calculated intake parameters for training goals.
98 g
Daily Protein Goal
Goal Target:Maintain
Ratio Coefficient:1.4 g/kg
shiftvitals.app
The Role of Protein in Body Composition
Protein is a vital macronutrient responsible for the growth, repair, and maintenance of virtually all body tissues, including muscle fibers, organs, skin, and hormones.
When you train or engage in physical activity, muscle fibers experience microscopic damage. Dietary protein provides the essential amino acids required to repair this damage, fostering muscle recovery and hypertrophy (growth).
How Requirements Are Calculated
Your daily protein target is determined by body weight, lean mass ratios, activity levels, and fitness goals:
- The Sedentary Baseline: The Recommended Dietary Allowance (RDA) of 0.8g/kg (approx. 0.36g/lb) is the minimum required to avoid deficiency.
- The Active Range: Strength athletes and active individuals require 1.2 to 2.2g/kg (0.5 to 1.0g/lb) to sustain recovery.
- Deficit Protection: When losing weight (caloric deficit), raising protein to 2.0 to 2.4g/kg protects lean muscle mass from being metabolized for energy, ensuring fat loss rather than muscle loss.
Frequently Asked Questions
References & Scientific Sources
- Phillips, S. M., & Van Loon, L. J. (2011). Dietary protein for athletes: from requirements to optimum adaptation. Journal of Sports Sciences, 29(sup1), S29-S38.
- Morton, R. W., et al. (2018). A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. British Journal of Sports Medicine, 52(6), 376-384.
- International Society of Sports Nutrition (ISSN). Stand Position on Protein and Exercise. Journal of the ISSN.