VisualWegovy is an AR/MR system for Meta Quest 3 that spatially overlays a blue LUT color filter onto food during a meal. Blue is nearly absent in naturally edible foods and is known to suppress appetite through the color–food association mechanism — making it a viable non-pharmacological HCI intervention.

How It Works

Two stacked OVRPassthroughLayer components render the real-world background in full color while projecting a blue LUT filter exclusively onto a Quad mesh positioned above the food. Only the food region is tinted; the surrounding environment stays in natural color.

Pilot Study (n=4, May 2026)

Between-subject design: Blue filter ON (n=2) vs. control (n=2). Appetite measured via VAS (0–100 mm) at T0 (baseline) and T1 (immediately after headset-on).

RQ1 — Appetite Suppression

Blue condition averaged −9 pt VAS change (P2: −7, P3: −11) vs. +7.5 pt in control (P1: +15, P4: 0) — directionally consistent with the hypothesis.

RQ2 — Taste Evaluation

Taste suppression was unclear at pilot scale. Likert scores were nearly identical across conditions (Blue 3.0 vs. None 3.5 / 5).

Supplementary — Eating Behavior

Blue participants consumed less food (avg 41 g vs. 61.5 g) and ate more slowly (avg 20.5 vs. 25.2 g/min).

Qualitative Findings

All 4 participants spontaneously described the color–appetite suppression link in retrospective Think-Aloud interviews, consistent with Spence (2015).