Men and women are different, that is, in the physical aspect. This can be seen from the structure and shape of their bodies to their weight and anatomy. While men build muscles easily and have greater body strength, women have four times as many brains cells connecting the right and left side of the brain. Due to the differences in their physical composition, their body needs different supplements, too. There are vitamins specifically geared to meet a woman's health needs and even products which are marketed as safe diet pills for women. These contain ingredients rich in estrogen which plays an important role in the female reproductive development.