Protein has become the star nutrient of the moment, promoted on everything from cereal boxes to bottled water. Some of the enthusiasm is justified, because protein genuinely is essential and many people, especially older adults, get too little. But marketing has also created confusion, leaving many unsure whether they need a shake after every workout or should worry about hitting sky-high targets. The truth is more measured, and once you understand the basics, meeting your needs is straightforward.
Why protein matters
Protein provides the building blocks, called amino acids, that your body uses to build and repair muscle, skin, hair, enzymes, hormones, and immune cells. Unlike fat, the body has no large store of protein to draw on, so a regular supply from food is important. Protein is also the most filling of the three main nutrients, which is why higher-protein meals tend to keep you satisfied longer, a useful ally for anyone managing their weight.
How much you need
The baseline recommendation to prevent deficiency is about 0.8 grams of protein per kilogram of body weight per day. For a 70 kilogram adult that is roughly 56 grams. However, this is a minimum to avoid shortfall, not an optimal target for everyone. Needs are higher in several situations:
- Older adults, who need more to counter age-related muscle loss, often around 1.0 to 1.2 grams per kilogram
- People doing regular strength or endurance training, commonly 1.2 to 2.0 grams per kilogram
- Those recovering from illness or injury
- People eating in a calorie deficit who want to preserve muscle
For most active adults, a range of roughly 1.2 to 1.6 grams per kilogram covers the bases. Very high intakes beyond this offer little extra benefit for the average person, and there is no need to chase extreme numbers.
Quality and sources
Protein comes from both animal and plant foods. Animal sources such as meat, fish, eggs, and dairy are complete, meaning they contain all the essential amino acids. Many plant sources are lower in one or more amino acids, but eating a variety across the day easily covers your needs. Good sources include:
- Chicken, fish, and lean meat
- Eggs and dairy such as yogurt and cheese
- Beans, lentils, and chickpeas
- Tofu, tempeh, and edamame
- Nuts, seeds, and whole grains
Whole foods should do most of the work. Protein powders are convenient and perfectly fine, but they are a supplement to a good diet, not a requirement.
Does timing matter?
You may have heard about an anabolic window, a narrow period after exercise when protein must be consumed. For most people this is overstated. What matters far more is your total protein across the whole day. Spreading it fairly evenly across meals, rather than loading it all at dinner, does appear to help the body use it efficiently for muscle, so aiming for a good source of protein at each meal is a sensible habit.
Is too much protein harmful?
For healthy people, higher protein intakes within reason are safe, and long-standing fears about protein harming healthy kidneys are not supported by the evidence. People with existing kidney disease are an exception and should follow medical guidance on protein. As with most things in nutrition, extremes are unnecessary; a moderate, consistent intake from good sources serves almost everyone well.
The practical takeaway
Include a source of protein at each meal, favour whole foods, and pay a little more attention to protein if you are older, training hard, or trying to lose weight while keeping muscle. You do not need endless shakes or complicated timing, just a steady, sensible intake spread across your day.
This article is for general information only and is not a substitute for professional medical advice. Talk with a qualified healthcare provider about your individual needs before making changes to your diet, exercise, or treatment.