The Grading of Recommendation, Assessment, Development, and Evaluation (GRADE) tool was used to assess the certainty of the evidence for the two primary biochemical outcomesserum vitamin B12 concentration increase and homocysteine reductionacross all included studies, and separately for randomised controlled trials (RCTs) and observational studies
allergan.com Sobel J, Tucker N, Sulka A, McLaughlin J, Maslanka S
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Therefore, when your liver is overburdened with toxins to filter out of your system, toxins may also start coming out through your skin, which can clog your pores and lead to breakouts (16)