The science on it is not settled, but some experts believe that different algae extracts can in theory trigger acne if they contain a lot of iodine (and some of them do). If you notice that you get acne after using a product with algae extracts (including algin), it is a good idea to stop for a while and see if the breakouts stop / get better without the product. Unfortunately, there is no other way to tell for sure. Also, while algae extracts could be beneficial, they are not miracle workers so you won't lose much if you decide to avoid them just in case.
The science on it is not settled, but some experts believe that different algae extracts can in theory trigger acne if they contain a lot of iodine (and some of them do). If you notice that you get acne after using a product with algae extracts (including algin), it is a good idea to stop for a while and see if the breakouts stop / get better without the product. Unfortunately, there is no other way to tell for sure. Also, while algae extracts could be beneficial, they are not miracle workers so you won't lose much if you decide to avoid them just in case.