I think understanding the deep meaning of Carbohydrates, Lipids, Protein, and Nucleic Acid is not really necessary than what happens in your body when indigesting these macromolecules.
I'm personally confused as to what Sean's confused about. (To some extent, being in a fitness family, it felt like he was mocking health/fitness, although I know it's all in fun)
Losing weight majority comes down to either rigorous cardio and weight training OR change in diet. There's also both. Most people can lost a lot of weight by changing their diet.
- If you drop all simple carbs
- 1-2 times a week eat complex carbs (Yams, Whole Grain Foods, Starchy Vegetables)
- Do at least 30 mins of cardio a day (Any type, walking, running, etc...)
This is just purely an example of a way to lose weight. Obviously, it's not for everyone.
You should lose around 1-2 lbs per week, maybe more, it's different with every body type. (Ecto, Endo, and Mesomorph)
Also, Sean's comment on 22 year olds and their confusion on health is probably for most 22 year olds. My brother was pretty obsessed with health and looking good ever since he went to college at the age of 17. (I would call him a narcissist but somewhat humble, he talks but has game)
"Knowing how to be healthy is easy, being healthy is a different story."
“Some succeed because they are destined to, but most succeed because they are determined to.” ― Henry van Dyke