I need to clear something up here. When something is said to be a "natural sunscreen", that doesn't mean it has a high enough SPF to actually protect you, and it also does not mean that it will protect against the specific wavelengths of UV that damage skin. Raspberry seed oil in particular only protects against the less harmful wavelengths of UV light, and not the one that causes skin cancer. The one that causes skin cancer makes up about 95% of the UV light that reaches us, which means that raspberry seed oil only protects you from the other 5% of UV light from the sun, and even then it's only reducing that by a little bit.
In fact, this product looks like it's just oils, which means it will promote and accelerate skin damage from the sun. In Arizona, you need a sunscreen that is more like SPF 50. I would not even use this on myself if I were to go outside unless I was staying in the shade, and/or wearing UV protective clothing. A product that is mostly oil will probably nullify/inactivate a commercially available sunblock, so I wouldn't mix them.
Unfortunately, it's not always possible to see how much damage there is going on under the surface until skin cancer appears. Any benefit you're seeing from this product is most likely some of the oils helping your skin recover from the damage to the surface, but the damage that causes skin cancer is deeper than the oils can reach. I think it is extremely unethical for this company to be promoting this product as a natural sunscreen. The FDA has things to say on that topic. Sorry to get riled up but I can't just let it go. You need to know.
ETA: I found photos from someone who tested pure raspberry seed oil as a sunscreen, compared to other oils and some purchased sunscreens of different SPF ratings:
https://nyponros.com/en/sunscreen/rasberryseed-oil-sunscreen