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Some small studies suggest it may raise blood glutathione levels, but the findings are not consistent across larger or long-term trials

The lightweight formula absorbs quickly, making it ideal for layering with vitamin c serum, face mask, sheet mask, eye patches, under eye patches, and other corrective treatments in a complete skin care routine

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147 SatoH.ArawakaS.HaraS.FukushimaS.KogaK.KoyamaS.et al (2011)

As well, some people may have allergies or medical conditions that do not allow them to be a good candidate to receive vitamin B12 shots, such as kidney problems, low potassium levels, deficiencies in other vitamins such as iron or folic acid, or just an allergy or sensitivity to vitamin B12 itself