Menopause and the unintended consequences from weight loss

In our last blog, we identified what menopause is and why weight gain is common. Understandably, this can trigger a strong desire to “get control” of weight. Diet culture often amplifies this pressure, promoting restrictive approaches, elimination diets or aggressive calorie deficits.

However, the pursuit of weight loss during menopause can carry unintended nutritional consequences. When dietary intake becomes overly restrictive or unbalanced, key nutrients that are already critical at this life stage may fall short — increasing the risk of deficiencies, loss of lean mass, reduced bone density and worsening long-term health outcomes.

Common Ways Women Try to Lose Weight During Menopause

Many women turn to:

• Very low-calorie diets
• Intermittent fasting or prolonged fasting windows
• Low-carbohydrate or ketogenic diets
• Skipping meals
• Eliminating food groups, such as dairy, grains or legumes
• Juice cleanses or detoxes
• Appetite-suppressing supplements

While some of these approaches may produce short-term weight loss, they frequently compromise dietary quality and sustainability.

The Nutritional Consequences of Restrictive Dieting in Menopause

Menopause is a period where nutrient requirements become more important, not less. Restriction increases the risk of falling short in several key areas.

1. Calcium and Vitamin D Inadequacy

Oestrogen decline accelerates bone resorption and reduces bone mineral density. This significantly increases osteoporosis and fracture risk. Low-energy diets or avoidance of dairy and fortified alternatives can reduce calcium intake below recommended levels. Consequences may include:

• Accelerated bone loss
• Increased fracture risk
• Height loss and spinal compression

Adequate calcium, vitamin D, protein and weight-bearing exercise work synergistically to protect skeletal health.

2. Iron Deficiency and Low Iron Stores

Although menstrual blood loss ceases after menopause, iron deficiency can still occur, particularly with low total food intake, limited red meat or plant-based iron sources, or poor absorption. Low iron status is associated with:

• Fatigue
• Reduced exercise tolerance
• Brain fog
• Hair thinning

Chronic restriction reduces both haem and non-haem iron intake and often displaces iron-rich foods.

3. Magnesium Insufficiency

Magnesium plays an important role in:

• Muscle and nerve function
• Glucose metabolism
• Blood pressure regulation
• Bone mineralisation

Low magnesium intake has been associated with insulin resistance, inflammation and poorer sleep quality — all relevant to menopausal health.

Restrictive diets low in whole grains, nuts, seeds and legumes commonly fall short.

4. Low Fibre Intake

Low-carbohydrate or highly processed “diet” patterns often reduce fibre intake. Fibre is important for:

• Gut microbiota diversity
• Bowel regularity
• Cholesterol lowering
• Glycaemic control
• Satiety

Low fibre intake is associated with increased cardiometabolic risk — particularly concerning as cardiovascular disease risk rises after menopause.

5. Inadequate Protein Intake

Protein needs increase with age due to anabolic resistance, which is a reduced muscle protein synthesis response. Insufficient protein can contribute to:

• Loss of lean mass
• Reduced metabolic rate
• Reduced strength and functional capacity
• Higher fracture risk

Chronic dieting often prioritises calorie reduction without protecting protein intake.

6. Increased Risk of Disordered Eating Patterns

Repeated cycles of restriction can lead to:

• Preoccupation with food
• Guilt and shame around eating
• Binge–restrict cycles
• Reduced trust in hunger and fullness cues

These patterns are associated with poorer mental health and long-term weight instability.

A Different Approach to Nutrition During Menopause

Menopause is not a failure of willpower. It is a new physiological chapter — and it deserves a nutrition approach grounded in adequacy, flexibility and compassion. If you would like help managing your health during menopause, or would like to set yourself up well before entering this stage of life, book an initial consultation with one of our Ward Nutrition dietitians.

Email: admin@wardnutrition.health