When buying Plasmids, Tonics, and Upgrades from the Gatherer's Garden, make sure to buy the Tonics first. Then, search every area for other Tonics. When you reach Point Prometheus there will be three Tonics to find, while the rest of the Tonics are available in the Gatherer's Garden. This will ensure you get the achievements. Note: To check how many Tonics you have, go to a Gene Bank and count each "track".