When utilizing citrus oils in any formulation, special care must be paid to respecting the proper balance of ratios to protect against potentially heightened photosensitivity. I include only the highest quality oils in my blends, and pair any citrus with other naturally sun protective and healing ingredients for extra assurance of safety and efficacy. I completely avoid the most phototoxic oils (such as bergamot) in my formulas. If you are especially prone to sun sensitivity or are taking any medications that may increase your risk, be sure to pair with a sunblock or go ahead and indulge in The Youth Dew solely as your night treatment, rotating with The Blue Cocoon for daytime use.