Dr. Mike Hart provides parents with this helpful fun - in - the - sun advice via the Huffington Post for the safe,
moderate use of sunscreen, «Most modern day sunscreens have many potentially harmful ingredients that should be avoided.
It has been suggested by some vitamin D researchers, for example, that approximately 5 — 30 minutes
of sun exposure between 10 AM and 3 PM at least twice a week to the face, arms, legs, or back without
sunscreen usually lead to sufficient vitamin D synthesis and that the
moderate use of commercial tanning beds that emit 2 % — 6 % UVB radiation is also effective [6,20].