glutathione whitening serum with vitamin c review Paula's Choice 25% + Clinical | Nadia Vega level formula helps sustain a natural level of glutathione and vitamin C within skin’s most uppermost layers for extended results Paula's Choice Vitamin C Glutathione

The "does it break a fast" question gets much more complicated when you move away from unflavored, pure collagen

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For every 5 umol/L increase in plasma homocysteine, there was a 20% increase in the risk of coronary heart disease.22 These findings were confirmed by another review of 35 studies conducted in 14 countries among 27,448 adults and children aged 5 to 60 years

For anti-aging, regeneration, weight management, and recovery

Increasing glutathione levels can provide significant health benefits by supporting function, reducing oxidative stress, and promoting a healthy immune response

I think thats totally backwards