Complex sentence: In addition to pharmaceuticals, some herbal breast enlargement supplements contain phytoestrogens such as 8-prenylnaringenin and miroestrol and thus may be regarded as a form of hormonal breast enhancement, though evidence of their effectiveness, as well as safety data, are lacking.
Split into simpler sentences: In addition to pharmaceuticals, some herbal breast enlargement supplements contain phytoestrogens such as 8-prenylnaringenin and miroestrol and thus may be regarded as a form of hormonal breast enhancement. However, evidence of their effectiveness, as well as safety data, are lacking.