Your Complete Guide to Protein

The standard recommendation for sedentary adults sits at around 0.8g of protein per kilogram of body weight daily—roughly 46-50 grams for the average woman. However, research consistently shows this baseline represents the minimum to prevent deficiency, not the optimal amount for those who exercise regularly or want to maintain muscle mass as they age.

For active women, sports nutrition guidelines suggest aiming for 1.2 to 2.0g per kilogram of body weight. Where you fall within that range depends on your training style and goals. Those focused primarily on endurance activities typically sit at the lower end, while women doing regular resistance training benefit from the higher end of the spectrum to support muscle repair and growth.

You've probably heard about the "anabolic window"—the idea that you must consume protein within 30-60 minutes after exercise or miss out on muscle-building benefits. However, research has largely debunked this narrow timeframe. While your muscles are indeed more receptive to protein after training, the window appears to be much wider than once believed—potentially extending several hours depending on when you last ate.

What matters more is your total daily protein intake and how you distribute it across meals. Research shows that spreading your intake evenly throughout the day—around 25-30g per meal across three to four eating occasions—supports more consistent muscle protein synthesis compared to consuming most of your protein in a single meal.

That said, if you train in a fasted state, having protein relatively soon after your workout becomes more important. And while the timing may be flexible, ensuring you hit your daily target remains essential for supporting recovery and adaptation to training.

For healthy individuals with normal kidney function, higher protein intakes appear to be safe. A comprehensive meta-analysis found no evidence linking higher protein diets to kidney disease in healthy adults, including those with conditions like obesity, hypertension, or type 2 diabetes who haven't developed kidney problems. Research has examined intakes up to 2g per kilogram of body weight without finding adverse effects in healthy populations.

However, going significantly above recommended ranges doesn't appear to provide additional muscle-building benefits—there's a point of diminishing returns. The more important consideration is overall dietary balance. Very high protein diets often mean cutting back on carbohydrates or fats, which can affect energy levels and athletic performance. Those with existing kidney disease should work with their healthcare provider to determine appropriate intake levels.

Animal proteins—meat, fish, eggs, and dairy—are naturally "complete," meaning they contain all nine essential amino acids your body cannot produce on its own. They're also generally more digestible and bioavailable than plant sources. However, this doesn't mean plant-based diets can't meet your protein needs.

Several plant foods are also complete proteins, including soy products (tofu, tempeh, edamame), quinoa, buckwheat, hemp seeds, and chia seeds. For other plant proteins like beans, lentils, and grains, combining different sources throughout the day—not necessarily at the same meal—ensures you're getting all essential amino acids. Classic combinations like rice and beans, or hummus with wholegrain bread, naturally complement each other's amino acid profiles.

Protein has a genuine advantage when it comes to feeling satisfied after meals. Research consistently shows it increases satiety more than carbohydrates or fats, which can help reduce overall calorie intake without requiring conscious restriction. This natural appetite regulation supports weight management without obsessive calorie counting.

During periods of calorie restriction for weight loss, protein becomes even more crucial. It helps preserve lean muscle mass, ensuring the weight you lose comes primarily from fat stores rather than hard-earned muscle tissue. Maintaining muscle mass also supports your metabolic rate, making weight maintenance easier in the long term. Research suggests keeping protein intake on the higher end of recommendations during these periods—around 1.6g per kilogram—helps optimize body composition.

However, protein isn't a magic solution for weight loss. Creating an energy deficit still fundamentally matters, and protein-rich foods contain calories that count toward your daily total. The key is choosing lean, minimally processed sources that deliver maximum nutrition for their calorie load—think grilled chicken, fish, Greek yoghurt, and legumes rather than processed meats.