The most effective oil-soluble whitening ingredient suitable for use in a body oil formulation is Perfect-C™ (Ascorbyl Tetraisopalmitate).

• Solubility: It is an oil-soluble form of Vitamin C, which allows it to mix seamlessly and be highly stable in an oil-based product like a body oil.
• Efficacy: It offers superior skin absorption compared to water-soluble Vitamin C, providing excellent skin brightening (whitening) and anti-aging benefits.
• Usage Rate: It is recommended to use at a concentration of 1-10%, with 5% being a common effective rate. For noticeable whitening effects, use 2% or more.
• Mixing: Simply add it directly to the oil phase of your formulation.

Another oil-soluble Vitamin C option is Vitamin C Ester (Ascorbyl Palmitate), which is primarily used as an antioxidant in oil formulations, but Perfect-C™ is the superior choice for dedicated whitening.