If you've ever felt confused about protein, you're not alone. One week it's the hero nutrient, the next it's something to fear. So let's cut through the noise. As a Bachelor-qualified nutritionist who works with women every day, I want to give you a clear, practical answer to a genuinely useful question: how much protein do you actually need?

No fads. No powders you have to buy. Just the science, translated into something you can use tonight.

Why protein matters more for women than you think

Protein does far more than build muscle. It's the raw material for your hormones, enzymes, immune cells, hair, skin and nails. It keeps you fuller for longer, helps stabilise blood sugar (and therefore energy and mood), and protects the lean muscle that keeps your metabolism humming as you age.

For women specifically, protein becomes even more important through the decades. From your mid-30s, we naturally start losing muscle (a process called sarcopenia), and the hormonal shifts of perimenopause and menopause accelerate it. Adequate protein, paired with strength training, is one of the most protective things you can do for your future strength, bone density and independence.

So how much protein do women actually need?

The official minimum to prevent deficiency is around 0.8g of protein per kilogram of body weight. But "not deficient" is a low bar, and it's not the same as thriving.

For women who are active, lifting weights, trying to preserve muscle, or navigating perimenopause, the research consistently supports more:

  • General health and active women: 1.2-1.6g per kg of body weight per day
  • Building or preserving muscle (strength training): 1.6-2.2g per kg per day
  • Perimenopause and menopause: aiming toward the higher end (1.6-2.0g per kg) helps offset muscle loss

A practical example: if you weigh 70kg and you're strength training, a target of roughly 110-130g of protein a day is sensible. That sounds like a lot until you spread it across your meals, and it's far more achievable than most women expect.

If you carry more body weight, calculating from a goal or reference weight (rather than current weight) keeps the number realistic. This is exactly the kind of individualising I do with clients.

How to actually hit your target

The magic isn't in a shake. It's in building each meal around a protein anchor.

Aim for roughly 25-40g of protein per meal, across three to four meals. Your body uses protein best when it's distributed evenly rather than crammed into dinner.

Here's what that looks like in real food:

  • 2 eggs + Greek yoghurt at breakfast (~25g)
  • A palm-sized chicken breast (~30g)
  • A 95g tin of tuna (~22g)
  • 100g firm tofu + edamame (~20g)
  • 200g Greek yoghurt as a snack (~18g)
  • A scoop of protein powder, if convenient (~20-25g)

Whole foods first, supplements only to fill gaps. Powder is a tool, not a requirement.

Common protein myths, gently busted

"Too much protein damages your kidneys." In healthy women, higher-protein eating does not harm the kidneys. This myth comes from advice for people with existing kidney disease.

"Protein makes women bulky." It doesn't. Protein plus strength training builds the lean, strong, capable body most women actually want. Bulk requires a deliberate calorie surplus and years of training.

"Plant protein doesn't count." It absolutely counts. You may simply need slightly more total protein and a variety of sources (legumes, tofu, tempeh, soy) to cover all your amino acids.

Key takeaways

  • Most women under-eat protein, and "not deficient" isn't the goal.
  • Active and strength-training women do well on 1.2-2.2g per kg per day.
  • Aim higher (1.6-2.0g/kg) through perimenopause to protect muscle.
  • Spread protein across meals: 25-40g each, three to four times a day.
  • Whole foods first; powder is optional and convenience-based.
  • Higher protein is safe for healthy kidneys and won't make you bulky.

Frequently asked questions

How much protein should a woman eat per day to build muscle?

Women who strength train to build or preserve muscle generally need 1.6-2.2g of protein per kilogram of body weight daily. For a 70kg woman, that's roughly 110-150g per day, spread across three to four meals of 25-40g each.

Is 100g of protein a day enough for a woman?

For a smaller or moderately active woman, 100g a day can be enough. But for women who are strength training, larger-bodied, or in perimenopause, 100g may fall short. Calculate 1.2-2.0g per kg of body weight to find your individual target.

Do women need more protein during perimenopause?

Yes. Declining oestrogen accelerates muscle loss, so women in perimenopause and menopause benefit from the higher end of the range (around 1.6-2.0g per kg daily), combined with regular strength training to preserve muscle and bone.

Working out your number is one thing; building meals you'll actually enjoy and repeat is another. If you'd like protein-rich meals sorted for you, my Nutrition Made Simple recipe membership takes the guesswork out, with realistic, whole-food meals built to hit your daily target. Come and make eating well genuinely simple.