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This page presents Premin, a folic acid supplement sold on Rakuten Marketplace, ranked #1 for 250 consecutive weeks. Designed for women from pre-conception through week 13 of pregnancy, this physician-recommended product has undergone safety clinical trials. Each 31-day package contains 124 tablets (4 tablets daily). The supplement contains essential nutrients including 400μg folic acid, 5mg iron, and 260mg calcium, plus vitamins A, B-complex, C, D, and minerals. Priced at 4,980 yen with free shipping, it's manufactured by Gennai Pharmaceutical, a company supporting women's health across various life stages including pre-conception, pregnancy, and postpartum periods.