From the Research
A BMI of 19.84 in an 86-year-old is generally considered low, and maintaining or slightly increasing weight is recommended to prevent potential health issues. For adults, a BMI between 18.5 and 24.9 is classified as normal weight. However, for elderly individuals, especially those over 65, some experts suggest that a slightly higher BMI (between 23 and 30) may be more protective against health issues, as supported by a recent study 1. At 19.84, the BMI indicates adequate weight but leaves little reserve if illness or decreased appetite occurs, which is common in older adults.
Key Considerations
- Weight loss in the elderly can lead to muscle loss, decreased immune function, and increased frailty.
- Regular monitoring of weight is important, as unintentional weight loss can be a sign of underlying health issues.
- If weight maintenance is difficult, smaller, more frequent meals and nutritional supplements might be helpful.
- A study published in the European Heart Journal in 2024 found that a higher BMI was associated with decreased mortality risk in the oldest-old, suggesting that a BMI of around 28.0 kg/m2 may be optimal for this age group 1.
Recommendations
- Focus on nutrient-dense foods and adequate protein intake (1-1.2 grams per kilogram of body weight daily) to maintain or slightly increase weight.
- Consider consulting a healthcare professional or registered dietitian to develop a personalized nutrition plan.
- Regularly monitor weight and overall health to prevent potential complications associated with low BMI in the elderly.