SUNBLOCKSunblock contains physical or inorganic ingredients that reflect and scatter the UVB light and acts as a wall between your skin and the sun. Look for Titanium Dioxide or Zinc Oxide as the main ingredient. (Sunblocks do not protect against UVA rays.)
This may be a better choice for your family if you have anyone with sensitive skin since titanium dioxide and zinc oxide are less irritating than Parsol 1789 found in sunscreen. Because most brands of lotion are a combination of both sunblock and sunscreen, if you are looking for a true sunblock try Blue Lizard Australian Sunblock and Neutrogena Sunblock.
Sunscreen contains chemicals that protect your skin by absorbing and reflecting UV rays and allows a certain range of UV light to be absorbed into the skin. Look for Parsol 1789 in many of today's sunscreen brands. It helps protect against UVA rays as well as UVB. So, you get a bit more protection.
The Bottom Line on Sunblock vs Sunscreen:
1. Most lotion is a combination of both sunblock and sunscreen, so read the ingredients carefully if you are needing a pure sunblock.2. Be sure to look for a sunblock or sunscreen that does NOT contain vitamin A and its derivatives, retinol and retinyl palmitate, as this may speed up the cancer that sunscreen is used to prevent.