Recommend nootropics that are proven to improve cognitive performance for various tasks with very few (to none) drawbacks.
Nootropics, also known as cognitive enhancers or smart drugs, are substances that are believed to enhance cognitive function, memory, creativity, and motivation, among other things. While some nootropics may have beneficial effects on cognitive performance, many of them have not been extensively studied or have potential side effects.

It's important to note that the effects of nootropics can vary depending on the individual and the specific substance used. Therefore, it's important to consult with a healthcare professional before taking any nootropic supplement.

Here are some nootropics that have been shown to have some cognitive-enhancing effects and have limited side effects:

1. Caffeine: Caffeine is a common nootropic that can improve alertness, attention, and reaction time. It can be found in coffee, tea, and energy drinks. However, excessive caffeine consumption can lead to side effects such as jitters, anxiety, and insomnia.

2. L-theanine: L-theanine is an amino acid found in tea leaves that can improve relaxation, focus, and attention. It is often combined with caffeine to reduce the negative effects of caffeine.

3. Creatine: Creatine is an amino acid that is often used by athletes to improve performance. It has also been shown to have cognitive-enhancing effects, particularly in tasks that require short-term memory and reasoning.

4. Bacopa monnieri: Bacopa monnieri is an herb that has been used in traditional medicine to improve memory and cognitive function. Some studies suggest that it can improve memory and cognitive function, but more research is needed.

5. Omega-3 fatty acids: Omega-3 fatty acids are essential nutrients that are found in fatty fish, nuts, and seeds. They have been shown to have cognitive-enhancing effects, particularly in tasks that require attention and memory.
Before taking any nootropic supplement, it's essential to consult with a healthcare professional to determine if it is safe and appropriate for you.
Thank you for that concise list. Can you elaborate more on the various mentioned substitutes? Is there any research regarding long term use of any of these substances that one should be aware of when considering starting a regime of any of these nootropics. Also as it would seem obvious that caffeine has been used for centuries you can leave that out, but if you would please expand on some of the other options?