Table 1.

Chitin content from different sources.

Source	Chitin Content %	Ref.
Cicada orni sloughs (this study)	42.6
Mushrooms	5.9–7.4; 4.31–9.66; 1.87–6.93	[15,39,40]
Grasshopper	4.71–11.84	[28]
Whole cicada body	4.97–8.84	[30]
Cicada sloughs	37	[35]
Squid gladius 1	40–42; 31.27; 31	[37,41,42]
House cricket	4.3–7.1	[43]
Worm of giant flour	4.77–5.43	[44]
Colorado potato beetles	20	[45]
Beetle (H. parallela)	15	[44]
Shrimp wastes	10.13; 3.12–17.36; 7.2	[46,47,48]
Crab shells	27.4; 17.35–20.62	[48,49]
Brine shrimp cysts	29.3–34.5	[50]
Hornet (Vespa velutina)	11.7	[51]

¹ Chitin extracted from squid gladius is β-chitin.