When should scientific disciplines be capitalized?

When writing motivation letters like SoP, or any other formal text, I don't know whether I have to capitalize sciences or areas of research.

For example:

• I have been introduced to Neuroscience.
• I have been introduced to neuroscience.

Are there any criteria for capitalization?

Solution 1:

Never should scientific disciplines be capitalized.

Source: dictionaries

Are there any criteria for capitalization?

Just because it's a mass noun (or a non-count noun) doesn't mean you can freely capitalize it. Please don't confuse a mass noun with a proper noun, which should generally be capitalized.