Yes, there are certain health conditions which mean you should not supplement L-Glutathione
Collectively, these peptides are being sold under the rubric of research chemicals to bypass FDA review
Costela-Ruiz VJL, Melguizo-Rodrguez C, Bellotti R, Illescas-Montes D, Stanco CR, Arciola E, Lucarelli
Contrasting effects of propionate and propionyl-L-carnitine on energy-linked processes in ischemic hearts
The five proteins most important for predicting residual disease after NACT with SHAP analysis via XAI methods applied to the optimal random forest model are those with accession codes P48637 (glutathione synthetase), O43491 (band 4.1-like protein 2), O95302 (peptidyl-prolyl cis-trans isomerase FKBP9), Q96CX2 [Broad-Complex, Tramtrack, and Bric-a-brac/POxvirus and Zinc finger (BTB/POZ)] domain-containing protein (potassium channel tetramerization domain-containing protein 12 [KCTD12]), and P49189 (4-trimethylaminobutyraldehyde dehydrogenase)