Original sentence: The controversy has led to concerns (both over its carcinogenity,  as well as its estrogenic effect) being expressed over the continued use of parabens as preservatives, although the scientific community has rejected both the cancer claim,   and the claim on its estrogenic effect.Whereas the cosmetic industry believes that most cosmetic ingredients are perfectly safe due to their long term use and safety record, cosmetic campaigns raise awareness about safety concerns of potentially risky ingredients to avoid (see also precautionary principle), and they believe that further research is necessary to determine the safety of parabens and other preservatives, currently used in the marketplace
Edited sentence: Numerous studies have shown no connection between cancer and paraben containing health and beauty products    yet the rumor of a link persists.The cosmetics industry believes these cosmetic ingredients are safe based on the long term use and safety record and scientific studies and plan on their continued use.The estrogenic effect of butylparaben has also been shown to be very low relative to other exposure risks; however, rumors persist regarding its effects.The potential connection between parabens and disease continue to be written about in the ever popular organic products literature where paraben free alternatives are offered and grass roots campaigns are encouraged to lobby the industry to remove parabens from consumer products as they believe further studies are needed to prove their safety (see precautionary principle)