How Much Protein Should You Eat During Perimenopause? Understanding Protein, Amino Acids and Healthy Ageing

When we think about nutrition during perimenopause, we often focus on hormones, calcium or healthy fats. Yet one of the most important nutrients for healthy ageing is often overlooked:

Protein.

Protein is far more than a nutrient for athletes. It provides the building blocks your body needs to maintain muscle, support healthy bones, produce hormones and neurotransmitters, repair tissues and maintain a healthy gut.

As estrogen declines during perimenopause, maintaining adequate protein intake becomes increasingly important.

How Much Protein Should you Eat?

Why Does Protein Become More Important During Perimenopause?

During perimenopause, declining estrogen affects many systems throughout the body.

Women naturally begin to lose muscle mass and strength, a process that can accelerate if protein intake is inadequate.

Adequate protein intake may help support:

• Maintenance of lean muscle mass

• Recovery after exercise

• Healthy bones

• Satiety and appetite regulation

• Blood sugar regulation

• Healthy ageing

• Immune function

• Hormone and neurotransmitter production

• Gut lining repair and digestive health

Combined with regular resistance training, consuming enough protein is one of the most effective lifestyle strategies to support healthy ageing.

What Is the Australian Recommended Dietary Intake (RDI) for Protein?

According to the National Health and Medical Research Council (NHMRC), the Recommended Dietary Intake (RDI) for healthy adults is:

Age	Protein RDI
Women 19–70 years	46 g/day (0.75 g/kg/day)
Men 19–70 years	64 g/day (0.84 g/kg/day)
Women over 70 years	57 g/day (0.94 g/kg/day)

The RDI is designed to prevent protein deficiency in almost all healthy people. It is not necessarily the amount required to optimise muscle mass, healthy ageing or exercise recovery.

How Much Protein May Be Beneficial During Perimenopause?

Research over the past decade suggests that many women in perimenopause and menopause may benefit from higher protein intakes than the current RDI, particularly if they are physically active or participate in resistance training.

Practical Protein Targets

Lifestyle	Suggested Intake
Sedentary adults	0.8–1.0 g/kg/day
Active adults	1.2–1.4 g/kg/day
Perimenopause and menopause	1.2–1.6 g/kg/day
Resistance training and muscle preservation	1.6–1.8 g/kg/day

Example

A woman weighing 70 kg who performs regular strength training may benefit from:

70 × 1.8 = 126 grams of protein per day

Rather than eating most of your protein at dinner, aim to distribute it across the day.

For example:

• Breakfast: 30–35 g

• Lunch: 30–35 g

• Dinner: 30–35 g

• Snack or post-workout: 20–30 g

What Are Amino Acids?

Proteins are made up of smaller building blocks called amino acids.

When you eat protein-containing foods, your digestive system breaks them down into amino acids that are absorbed through the small intestine and used throughout the body.

These amino acids help build:

• Muscles

• Skin, hair and nails

• Digestive enzymes

• Hormones

• Neurotransmitters

• Immune cells

• Bones and connective tissue

• The lining of the digestive tract

Essential Amino Acids

There are nine essential amino acids, which the body cannot produce in sufficient amounts and therefore must be obtained through food.

These include:

• Histidine

• Isoleucine

• Leucine

• Lysine

• Methionine

• Phenylalanine

• Threonine

• Tryptophan

• Valine

Why They Matter

Leucine

Leucine is particularly important during perimenopause because it stimulates muscle protein synthesis, helping maintain lean muscle mass as we age.

Tryptophan

Tryptophan is used to produce serotonin and melatonin, which support mood and sleep.

Methionine

Methionine plays an important role in methylation, detoxification and glutathione production.

Threonine

Threonine helps maintain the protective mucus layer lining the digestive tract.

Phenylalanine

Phenylalanine is converted into tyrosine, which is needed to produce dopamine, noradrenaline and thyroid hormones.

Non-Essential Amino Acids

Non-essential amino acids can be produced by the body, but they remain vital for health.

Examples include:

• Alanine

• Arginine

• Asparagine

• Aspartic acid

• Cysteine

• Glutamic acid

• Glutamine

• Glycine

• Proline

• Serine

• Tyrosine

Important Roles

Glutamine

Supports intestinal cells and immune function and is an important fuel source for the gut lining.

Glycine

Contributes to collagen production and detoxification pathways.

Tyrosine

Helps produce:

• Dopamine

• Noradrenaline

• Adrenaline

• Thyroid hormones

Cysteine

Required for the production of glutathione, one of the body's major antioxidants.

What Are Conditionally Essential Amino Acids?

Sometimes the body can normally produce enough of certain amino acids, but during periods of increased demand it may not keep up.

This may occur during:

• Illness

• Injury

• Surgery

• Chronic stress

• Intense physical training

These are known as conditionally essential amino acids.

Examples include glutamine, arginine and tyrosine.

Protein Digestion Matters Too

Eating enough protein is only part of the story.

Your digestive system must also break protein down into absorbable amino acids.

Protein digestion begins in the stomach, where hydrochloric acid (HCl) unfolds proteins and activates the enzyme pepsin.

The pancreas then releases digestive enzymes into the small intestine, where proteins are further broken down into amino acids before being absorbed.

Poor digestion may affect protein utilisation, particularly in people with:

• Long-term use of acid-suppressing medications

• Hypothyroidism

• Digestive disorders

• Pancreatic insufficiency

• Certain gastrointestinal conditions

If you experience bloating, early fullness or ongoing digestive symptoms, it is worth discussing these with your healthcare practitioner.

What Does 25–30 Grams of Protein Look Like?

Examples include:

• 100 g grilled chicken breast

• 120–150 g fish

• 170–200 g Greek yoghurt

• A tin of sardines

• Lean beef or lamb

• Tofu or tempeh (larger serves may be required)

• Eggs combined with Greek yoghurt or cottage cheese

Including a quality source of protein at each meal may help you meet your daily requirements more comfortably.

The Bottom Line

Protein is much more than a nutrient for muscles.

It provides the amino acids needed to support healthy ageing, hormones, neurotransmitters, immune function, gut health and tissue repair.

While the Australian RDI provides a minimum intake to prevent deficiency, many women in perimenopause—particularly those who perform resistance training—may benefit from higher protein intakes to help preserve muscle mass and support overall health.

Nutrition is always individual. Your protein needs depend on factors such as age, body weight, activity level, health conditions and personal goals.

If you're unsure whether you're eating enough protein, a personalised nutrition consultation can help determine the right amount for your individual needs.

References

• National Health and Medical Research Council (NHMRC). Nutrient Reference Values for Australia and New Zealand.

• Phillips SM, Chevalier S, Leidy HJ. Protein "requirements" beyond the RDA: implications for optimising health. Applied Physiology, Nutrition, and Metabolism. 2016.

• Morton RW, Murphy KT, McKellar SR, et al. A systematic review, meta-analysis and meta-regression of protein supplementation on resistance training-induced gains in muscle mass and strength. British Journal of Sports Medicine. 2018.

• Bauer J, Biolo G, Cederholm T, et al. Evidence-based recommendations for optimal dietary protein intake in older people. Journal of the American Medical Directors Association. 2013.