Why Do My Evolt Scan Results Sometimes Look Inaccurate?

The Most Important Metric: Total Body Water

Evolt uses bioelectrical impedance (BIA) technology, which measures how an electrical current flows through your body. Since electricity travels more easily through water and muscle than fat, your hydration levels have a direct impact on the results.

Total Body Water (TBW) is the amount of fluid in your body. For most adults, this sits between 55–65% of body weight and usually stays very stable.

Under consistent conditions, TBW should not fluctuate more than ±1% between scans.

How Water Changes Affect Your Results

Because the scanner relies on electrical resistance, even small changes in hydration can cause large-looking changes in muscle and fat readings.

If Your Body Water Drops:

• Electrical resistance increases
• Muscle mass may appear lower
• Body fat may appear higher
• Results can look like “muscle loss” or “fat gain” — even if nothing has changed

If Your Body Water Increases:

• Electrical resistance decreases
• Muscle mass may appear higher
• Body fat may appear lower
• Results can look unrealistically positive in a short time

These changes reflect fluid shifts, not real tissue change.

Common Reasons Your Body Water Changes

Your hydration levels can be influenced by many everyday factors, including:

• Training or exercise before your scan
• Sweating or dehydration
• High or low carbohydrate intake (carbs store water)
• Alcohol or caffeine
• Poor sleep or high stress
• Illness or inflammation
• Certain medications or supplements
• Hormonal changes (menstrual cycle or menopause)

Any of these can temporarily shift fluid between your cells and alter scan results.

Understanding “Unrealistic” Results

Some scan results are signs of altered hydration rather than body composition changes:

• Sudden large fat loss or gain over a short period
• Big muscle changes in days or a week
• Total body water significantly above or below normal range
• High extracellular water (ECF > 35%)
• High intracellular water (ICF > 65%)

These results don’t mean the scan is wrong — they mean conditions weren’t consistent.

How to Get the Most Accurate Results

Evolt scans are best used to track trends over time, not single readings.

Follow these pre-scan guidelines for the most consistent results.

The Bottom Line

Evolt scans are highly effective when used correctly. Most “inaccurate” results are actually hydration-related fluctuations, not machine errors.

When you focus on:

• Stable total body water
• Consistent scan conditions
• Long-term trends instead of short-term changes

…your scan data becomes a powerful tool for tracking real progress.