To access the data, click or select the words “Appendix 5.” *Male and female Sprague-Dawley rats were maintained from weaning in a cyclic light environment consisting of 140 lux for 12 h/day. Rats (P 50–60 days) were injected (i.p.) with rosemary extract (34 mg/kg), or vehicle (1% aqueous Tween-80/10% ethanol), 1 h before a 1 h light exposure and then placed in darkness. Eyes were enucleated under dim red light and rhodopsin extracted, as described [26]. Rhodopsin values were then calculated from the average of its levels measured in both eyes of n=2–5 animals.