Blackmores shares have continued to slide in the wake of a poor full-year result as worries about its prospects in China worsen, with Rich Lister Marcus Blackmore suffering the most on paper because of his 23.1 per cent stake.

Mr Blackmore, who is still the interim chief executive, holds 4.01 million shares in the tightly held vitamins maker and in the past year the value of his holding has fallen on paper by $400 million.