I'm one of the few that NailEnvy doesn't benefit. It contains formaldehyde. ProStrong has my nails extending over the tips on all except the pesky thumbnails. The whites are more than 1/4 of the nail length, a rarity. Trying Renovate on them this past week. Had ordered Perfect Formula TSV but returned, unopened/DSR, as it contains f/hyde. But as they don't list the ingredients on web, thought I'd let you know. But maybe it's OK for you.