What is the fine-grained topic of the following text: Result for in vivo showed that the extract did not induce oxidative stress and can be a positive agent in preventing lipid peroxidation while increase in functional HDL indicated that pineapple peels may be useful in the management of hyperlipidaemia and other associated diseases. Only return the topic.
Effects of pineapple peel extract on oxidative stress and hyperlipidaemia management.