<p><p><img src="http://www.acnnewswire.com/images/company/SDK.jpg" border="0" /></p>TOKYO, Oct 24, 2016 - (JCN Newswire) - Showa Denko ("SDK"; TSE:4004) has discovered that its "TPNa(TM)" water-soluble vitamin E derivative, which SDK sells as an ingredient for cosmetics, is effective in improving dark circles around eyes....