No synthetic fragrance in cosmetics refers to products that do not contain any artificially created scents. Synthetic fragrances are often made from chemicals and can cause skin irritation or allergic reactions in some individuals.

Advantages :
Firstly, they are less likely to cause skin irritations or allergic reactions, making them suitable for individuals with sensitive skin. Additionally, the absence of synthetic fragrances means that these cosmetics have a more neutral scent, which can be appealing to those who prefer a more subtle or natural fragrance. Furthermore, opting for cosmetics without synthetic fragrances can contribute to a healthier environment, as the production and disposal of synthetic fragrances can have negative impacts on ecosystems.

Disadvantages:
Without synthetic fragrance, the product may lack a pleasant scent, which is often a desirable feature for many consumers. Additionally, synthetic fragrances are often used to mask the natural scent of certain ingredients, so without them, the natural scent of the product may be more noticeable, which may not be appealing to everyone. Furthermore, synthetic fragrances can help extend the shelf life of cosmetics by masking any potential unpleasant odours that may develop over time. Without them, the product may have a shorter shelf life.

Conclusion:
These products are less likely to cause skin irritations or allergies, making them suitable for individuals with sensitive skin.


References:
https://www.clinikally.com/blogs/news/fragrance-free-vs-unscented-beauty-products-which-is-better-for-your-skin-1#:~:text=What%20does%20fragrance%20free%20in,or%20irritation%20caused%20by%20fragrance.
https://suntribesunscreen.com/the-dangers-of-synthetic-fragrances/