“How often should I scan?” is the second-most-asked question we get, after “how much does it cost?” The honest answer is “it depends on your goal” — but the depends are predictable. Here’s the goal-by-goal cadence we recommend, based on how often body composition actually changes meaningfully versus how much measurement noise you’ll accumulate.

The general principle

Two opposing forces govern scan cadence:

1. Real change happens slowly. Even an aggressive cut moves body fat by ~1% per 2 weeks. A lean bulk adds maybe 0.5–1 lb of muscle per month.
2. Measurement noise is roughly ±1.5%. Day-to-day water shifts, recent meals, and exercise can move the reading by close to that.

The optimal cadence is the one where real change exceeds measurement noise. For most goals, that’s 8–12 weeks.

Aggressive cut (1–1.5% body weight per week)

Cadence: every 4–6 weeks.

If you’re losing weight fast and want to make sure the loss is fat, not muscle, frequent scans make sense. The signal-to-noise ratio is high enough at this rate of change that 4-week scans give you actionable data. Risks:

• Lean mass dropping faster than expected → increase protein, slow the deficit.
• RMR adapting downward → consider a refeed or break.
• Visceral fat falling faster than subcutaneous → a good sign you’re targeting metabolic health.

Moderate cut or recomposition (~0.5% body weight per week)

Cadence: every 8–12 weeks.

This is most people’s actual cut speed, especially if they’re trying to preserve muscle. At this pace, real change accumulates slowly enough that 8–12 weeks is the right window. Earlier scans risk you reacting to noise; later scans risk drifting too far from the goal before correcting.

Lean bulk

Cadence: every 8–12 weeks.

Muscle gain is slower than fat loss for most people — 0.5–1 lb of true lean mass per month is typical. DEXA every 8–12 weeks lets you confirm:

• Lean mass actually moved up (not just water).
• Fat mass stayed reasonable (avoiding a sloppy bulk).
• Regional gains are symmetric (both legs, both arms).

A “successful bulk” without DEXA tracking is largely a guess. With DEXA, it’s measurable.

Maintenance / longevity tracking

Cadence: every 6 months.

If your physique is stable and you’re not actively pushing in a direction, twice-yearly scans are plenty. The data you’re tracking shifts:

• Visceral fat — do healthy lifestyle factors keep it low?
• Bone density — particularly past 40.
• Lean mass — has age started eroding muscle without you noticing?

Annual baseline (most casual clients)

Cadence: once a year.

For people who aren’t actively changing their physique but want a yearly checkup data point. One annual scan gives you a meaningful trend over a 5-year window without overspending on data.

When to scan less often

• If you scan every 2 weeks, the day-to-day noise overwhelms real change. You’ll start reacting to measurement artifacts instead of trends.
• If your routine isn’t changing, scans tell you nothing actionable.
• If you’re recovering from illness, surgery, or a major life event, the body composition will shift unpredictably for 4–8 weeks. Wait for stability.

The cost math

At $29.99 per scan or $20/month subscription:

Goal	Scans per year	Cost (single scans)	Cost (subscription)
Aggressive cut (12 wk)	2	$60	$60 (3 mo subscription)
Moderate cut + maintain	4	$120	$240 (annual)
Year-round tracking	4–6	$120–$180	$240
Annual baseline	1	$30	n/a

Subscription only makes sense if you’ll scan 8+ times per year. For most clients, single-scan booking is the right choice.

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