Live reactor
See what your calories are doing.
Move the sliders — the reactor shows your calorie balance, macro split, muscle synthesis, fat trajectory, and 30‑day projection in real time.
Log in to save your reactor across devicesLive · 2200 kcal · 150g protein
Calorie ReactorBalanceCalorie balance
+200
kcal / day
Surplus
Intake2200 kcal
TDEE2000 kcal
SplitMacro split
150g
Protein
27% of intake
Protein150g
Carbs220g
Fat80g
SynthesisProtein → muscle
150g
of 180g target
77%
MPS
Below83%
30‑day Δ lean+0.2kg
Per meal38g
Muscle protein synthesis (MPS) climbs with leucine‑rich meals above ~0.4 g/kg. Splitting across 3–4 meals extends the window.
EnergyFat trajectory
+0.18kg/wk
Storing as fat
0.8kg/mo
Projected
BurnSteadyStore
Daily gap+200 kcal
30‑day Δ fat+0.8kg
1 kg of fat ≈ 7,700 kcal. A 500 kcal daily deficit burns ~0.45 kg/wk — safe and sustainable for most adults.
Trajectory30‑day projection
+0.7kg
Body weight change in 30 days
70.7kg
Total
0.10kg
Lean
0.63kg
Fat
Activity
Daily meal logs
Each cell is one day. Hover for details.
Last 12 months
289 meal logs
5 day current streak · 17 day longest
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Presets
2200kcal
Maintenance range
150g
83% of 180g target — needs more
0.7level
Influences protein → muscle efficiency
1.1level
Drives the muscle‑mass multiplier in projection
Lean mass67kg
Fat mass17kg
Δ / wk+0.18kg
Estimates only. For medical or athletic guidance, talk to a registered dietitian.