A few years ago I used the 100 mg capsules of BioSil and it made a dramatic difference in my nails, but I never saw any obvious difference in my skin and I didn't take it long enough to know if it made a difference in my bones. I want to try it again because my K2 (MK4) trial made my bones hurt terribly and, I swear, within a few days my hips had narrowed. I know the missing co-factor for bone rebuilding could be strontium or geranium or something else entirely, but my nails are in awful shape so silicon seems like a good place to start. Has silicon fixed anything for you? How much silicon is too much? I see that this Brazilian pharmacy product has 300 mg doses: https://www.oficialfarma.com.br/biosil-300mg-30-capsulas-p7519/ And, on the topic of Brazilian pharmacies, has anyone managed to purchase from them from the U.S.? They actually have a few things that I would like to try!