Nativa SPA by O Boticario offers a Quinoa Hydrating Body Lotion and Body Oil that are designed to nourish and firm the skin. The products contain purified quinoa drops and are said to provide concentrated nutrients, omegas, and other benefits that visibly firm and nourish the skin. According to the product details, the Quinoa Effect is said to provide visible results in 28 days, with a high percentage of women agreeing that their skin's texture is improved, softer, and brighter, and that their skin appears more radiant and healthy. The products are also claimed to create a moisturizing layer over the skin. The positive aspects of these products include their firming and nourishing properties, as well as the reported visible results. However, the negative aspects and specific ingredients or materials are not mentioned in the provided search results. For more detailed information on the ingredients, it is recommended to refer to the product packaging or the manufacturer's official website.