This article is for general informational purposes and is not a substitute for professional medical advice. Always talk to a qualified health provider about your specific situation.
Protein recommendations online range from “just hit the standard minimum” to “eat your body weight in grams every day.” The right number depends on your goals, activity level, and age — here’s how to think about it instead of chasing one universal figure.
The baseline: what official guidelines say
Most national dietary guidelines set the Recommended Dietary Allowance (RDA) for protein at around 0.8 grams per kilogram of body weight per day for the average sedentary adult. That’s the amount needed to prevent deficiency in most people — it is not necessarily the amount that supports optimal muscle maintenance, recovery, or satiety.
Why active people often need more
Research on resistance training and endurance athletes generally points to a higher range — commonly cited as roughly 1.2 to 2.0 grams per kilogram of body weight — to support muscle repair and adaptation. Someone strength training several times a week has different protein needs than someone who is largely sedentary, and going with the bare RDA in that case may leave recovery and muscle maintenance on the table.
Protein needs change with age
Older adults tend to process protein less efficiently and are at higher risk of losing muscle mass (sarcopenia), so several researchers and geriatric nutrition guidelines suggest adults over roughly 65 may benefit from protein intake at the higher end of the general range, spread across meals rather than concentrated in one sitting.
A practical way to estimate your number
- Find your body weight in kilograms (divide pounds by 2.2).
- Sedentary adults: multiply by 0.8–1.0 g/kg as a starting point.
- Regularly active or strength training: multiply by 1.2–1.6 g/kg.
- Older adults or those actively trying to preserve muscle: multiply by 1.0–1.5 g/kg, spread across 3–4 meals.
These are general starting ranges, not prescriptions — individual needs vary based on health conditions, kidney function, and other factors, which is why this isn’t a substitute for personalized guidance from a registered dietitian, especially if you have kidney disease or another condition that affects protein metabolism.
Where protein actually comes from
You don’t need powders or bars to hit these numbers. A palm-sized portion of meat, fish, tofu, or legumes at each meal, plus dairy or eggs, gets most people to their target without much tracking. If you do track, remember that whole foods like beans and grains contribute meaningful protein too, even if it’s less concentrated than animal sources.