It looks like light-activated fullerenes are harmful.
So what about taking them in dim light just before going to sleep (in the dark) and even wear dark, full-body clothing (long sleeves, pants/trousers, sunglasses, even gloves the next day? Not a big deal for those living in cold weather areas.
The Baati study says C60 was stirred in olive oil in the dark.
Any mention of avoiding light exposure for C60oo or the rats?