One difference is that the amount of vitamin B12 in Centrum Silver (25 mcg) is much lower than the amount used in the positive studies (100 and 500 mcg, respectively). Loss of cognitive function is a well-known effect of vitamin B12 deficiency.
Click on the download link. Allow the song to download to your cell phone. Close your web browser and locate the song on your cell phone (usually under sounds, music, mp3s, or multimedia). Select the song to play it.
If you don't have an SD card for your phone you'll need to download the track from Google Play Music to your PC or Mac, then transfer it to the ringtones folder on your phone. In your PC browser head to play.google.com/music and select My Library, Songs. Step 2.