l-cysteine vs glutathione GSH hoards all the cysteine—what a slimy thing to do and connective tissues The Antioxidant Role of Glutathione

Kraus D, Yang Q, Kong D, et al

I researched and am so happy with Vitastir

L-GLUTATHIONE EFFERVESCENT TABLETS: Introducing hk vitals Glutathione Effervescent, fizzy tablets that deliver a powerful blend of 600mg L-Glutathione, Vitamin C & Vitamin E PROMOTES SKIN GLOW: L-Glutathione is a powerful antioxidant which along with Vitamin C & E helps reduce skin dullness and promotes skin glow REDUCES PIGMENTATION AND DARK SPOTS: Glutathione also helps reduce pigmentation and dark spots by regulating melanin production BOOSTS HYDRATION: Hyaluronic acid locks in moisture, ensuring the skin remains soft and hydrated RECOMMENDED DOSAGE: One hk vitals Glutathione Effervescent tablet daily will help improve your skin glow & reduce pigmentation

Journal of Dispersion Science and Technology

I believe he works for one of my competitors. I'm still on the hunt