Table 2.

Representative published time-course CIELAB parameters of turmeric/curcuminoid-based yellow pigments under environmental/light exposure (summarized from published data).

Study/System	Exposure condition	Time	L*	a*	b*	Interpretation	Reference
Turmeric oleoresin powder	Environmental exposure	Week 0	83.5	−3.1	59.3	Initial color parameters	Kim et al. (2025)
		Week 1	83.7	−3.6	47.4	Noticeable decrease in yellowness
		Week 2	85.3	−3.5	32.7	Progressive fading
		Week 3	85.9	−2.8	28.9	Significant loss of chroma
		Week 10	87.8	−0.7	13.8	Severe discoloration

Note: Values were extracted from published experimental data and reorganized for comparative illustration. L*, a*, and b* represent CIELAB color coordinates. Increases in L* and reductions in b* indicate progressive pigment fading during exposure.