If a serum smells bad it usually means it works., This glutathione serum smells like rotten eggs and thats your first clue its highly concentrated. Glutathione is known for targeting Glutathione is hands down one of my favorite supplements Ive used and honestly without the sublingual version from @ryzewellness I wouldnt be able to tolerate the PIP and I would never have stuck Liposomal Glutathione Supplement Body's Master Detoxifier Liposomal Glutathione Rho Nutrition