Safe to eat. I eat them in moderation. But 20 ginkos at one sitting is too much?? Even not preggie I feel it's overdosed I drink home made barley water every week. Similarly, my mother in law cooks them as we stay under same roof.I'm not over concerned on such...many friends I know drink barley, ginko, during preggie. All ends well. dont't need to read too much into it. But I will still avoid what's "basic" like raw fish, and some fishes high in mercury, raw egg, soft cheese, raw papaya.