Table 2. Changes in Hunter’s color value of chaga mushroom extract during storage

	Storage period (week)	L¹⁾	a	b	ΔE
	0	4.19±0.22^2)a3)	−0.03±0.02^a	−0.32±0.12^ab	-
Control⁴⁾	2	4.07±0.13^a	−0.03±0.02^a	−0.17±0.13^b	0.20±0.08^a
	4	4.03±0.03^a	−0.05±0.05^a	−0.30±0.25^ab	0.29±0.15^a
	6	4.15±0.09^a	−0.05±0.04^a	−0.32±0.10^a	0.24±0.14^a
	8	4.20±0.07^a	−0.04±0.03^a	−0.32±0.25^b	0.21±0.03^a
Sunlight⁵⁾	2	3.95±0.15^a	−0.02±0.01^a	−0.13±0.08^b	0.31±0.16^a
	4	4.24±0.46^a	−0.04±0.03^a	−0.37±0.18^ab	0.44±0.27^a
	6	4.25±0.27^a	−0.06±0.03^a	−0.53±0.02^ab	0.24±0.08^a
	8	4.09±0.16^a	−0.02±0.01^a	−0.21±0.13^ab	0.15±0.05^a

L, measures lightness and varies from 100 for perfect white to zero black; a, measures redness when plus and greenness when minus; b, measures yellowness when plus and blueness when minus; ΔE, Δ L 2 + Δ a 2 + Δ b 2 , color difference.
All values are expressed as mean±SD of triplicate determinations.
Means within column with different superscripts are significantly different (p<0.05).
Storage in darkness for use as control.
Storage under sunlight.