Bone Density What It Tells Us About Bone Strength
- 5 days ago
- 3 min read
Bone density refers to the amount of mineral content in bone. It helps indicate how strong or fragile bones may be and is one factor used to assess fracture risk.
Bones can feel normal even when bone density has decreased. This is why bone density testing may be considered when there are risk factors for bone loss, fractures, or hormone-related conditions that may affect bone health.
At Cedar Endocrine Clinic, located at Mount Elizabeth Medical Centre and Mount Alvernia Hospital, bone density concerns may be reviewed as part of an endocrine and bone health assessment.
What Bone Density Means
Bone density measures how much mineral, mainly calcium and phosphate, is present in bone.
In general:
Higher bone density is associated with stronger bones
Lower bone density may be associated with increased fracture risk
Bone density results should be interpreted with medical history and risk factors
A single result does not show the full picture of bone health
Bone strength is influenced by bone density, bone structure, age, hormones, nutrition, activity levels, and overall health.
How Bone Density Is Measured
The most common test used to measure bone density is a DEXA scan, also called dual-energy X-ray absorptiometry.
A DEXA scan usually measures bone density at:
The hip
The lumbar spine
Sometimes the forearm, depending on clinical need
Results are often reported using a T-score, which compares a person’s bone density with that of a young healthy adult.
A doctor may also consider other factors, such as age, fracture history, medication use, and medical conditions.
Osteopenia and Osteoporosis
Bone density results may help identify osteopenia or osteoporosis.
Osteopenia
This means bone density is lower than average but does not meet the threshold for osteoporosis.
Osteoporosis
This means bone density is reduced to a level associated with increased bone fragility and fracture risk.
Fractures related to low bone density may occur in areas such as:
Hip
Spine
Wrist
These conditions should be assessed by a healthcare professional and interpreted in the context of the person’s overall health.
Why Bone Density May Decline
Bone density usually reaches its peak in early adulthood and may gradually decline with age. Some people may lose bone density more quickly due to hormonal, medical, lifestyle, or medication-related factors.
Possible contributing factors include:
Menopause-related oestrogen decline
Low testosterone levels
Overactive parathyroid glands
Overactive thyroid function
Long-term corticosteroid use
Low calcium or vitamin D levels
Low body weight
Smoking
High alcohol intake
Reduced weight-bearing activity
Family history of osteoporosis or fractures
These factors do not confirm low bone density, but they may guide whether assessment is appropriate.
How Bone Density Results Are Used
A bone density result is not usually used on its own. It is reviewed together with clinical information to better understand fracture risk.
A medical review may consider:
Age and sex
Previous fractures
Family history
Falls risk
Calcium and vitamin D status
Medication use
Medical conditions
Hormonal factors
Lifestyle and activity levels
Some people with low bone density may need monitoring and lifestyle review. Others may require further evaluation or treatment discussion, depending on their risk profile and clinical findings.
Hormones and Bone Density
Hormones can affect how bone is maintained and renewed over time.
Hormonal conditions that may influence bone density include:
Hyperparathyroidism
Hyperthyroidism
Low oestrogen levels
Low testosterone levels
Cushing’s syndrome or long-term cortisol excess
Conditions affecting calcium or vitamin D balance
When hormonal factors are suspected, further assessment may help clarify whether they are contributing to bone loss.
When to Discuss Bone Density With a Doctor
You may consider speaking with a doctor about bone density if you have:
A history of fracture from a minor fall or injury
A family history of osteoporosis or hip fracture
Menopause-related bone health concerns
Long-term corticosteroid use
Thyroid, parathyroid, or reproductive hormone conditions
Low calcium or vitamin D levels
Low body weight
Concerns about falls or fracture risk
A medical assessment can help determine whether bone density testing or further evaluation may be appropriate.
Understanding Bone Density in Context
A bone density test provides useful information about bone health at a point in time. However, it is most helpful when interpreted alongside medical history, hormone health, lifestyle factors, and fracture risk.
At Cedar Endocrine Clinic, Dr Tay Tunn Lin provides endocrine care for individuals with concerns related to bone density, calcium balance, and hormonal factors that may affect bone health.
*This article is for general information and does not replace medical advice.
