Correction. US supplements work. Make sure to read review and get those GMP. GMP means it's certified to contain that ingredients.

How did I know? Personal testing that it works.
Mum had very bad back pain, cannot tolerate any normal pain killers from hospital. Gave her serratiopeptidase and the pain went away. No other meds. Of course buy directly from US and skip everything in Malaysia.

Another personal test. My father have prostate issues. Gave me some stuff form the US can see him visiting the toilet lesser.