Page 5 - Saw Palmetto Technichal Info

MTC Industries, Inc.
Herbsine Bioengineering Co., Ltd.

Figure 2 Chromatography of UV-171023

Figure 3 Chromatography of EE-1800628

2. Content of Sterols

Sterols are main components of unsaponifiable matter in oil, which include stigmasterol,
β-sitosterol, campesterol, stigmastanol, cholesterol, brassicasterol, avenasterol, and
gramisterol. USP36 specifies saw palmetto oil contains 0.2-0.5% of total sterols
(cholesterol, campesterol, stigmasterol, β-sitosterol, and stigmastanol), while USP39
specifies saw palmetto oil contains NLT 0.1% of β-sitosterol, and NLT 0.2% the total
sterols (campesterol, stigmasterol, β-sitosterol, and stigmastanol). We study two main
sterols as following:

SN-180401 UV-171023 EE-1800628
β-sitosterol, % 0.29 0.34 0.20
Stigmasterol, % 0.17 0.20 0.028
Total sterols, % 0.46 0.54 0.23
Table-2 Sterols content of various saw palmetto oils, Assay by GC

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