Following on from my previous series, My Journey to Understand Weight Loss and Metabolism, I’m now exploring the science of fat—how it builds up and what it’s made of. This is my journey of a constant struggle: my weight. I’ve fluctuated by 20 kilos multiple times, trapped on the rollercoaster of weight gain and loss. It’s frustrating, humbling, and why I’m sharing this weight loss journey with you. This series will trace fat from a visible belly to its smallest components: glycerol and free fatty acids (FFAs). Join me as we dive into the biology of fat accumulation, ideal for anyone curious about weight loss or seeking a healthier body fat percentage.

Fat is more than just the visible layer we notice—it’s a complex part of our biology. It stores energy for times when food is scarce, helps regulate body temperature, and supports hormone production that keeps our systems running (learn more). Fat also cushions organs and provides structural support. Its accumulation can impact health, which is why I’m driven to understand it deeply. My goal is to uncover the truth about fat accumulation, gain an in-depth understanding, and apply these insights to achieve sustainable weight loss and a healthy body fat percentage.

To explore this, I’m using a first-principles approach, starting with established science and moving towards my own theoretical ideas. I’ll draw on peer-reviewed research to explain how fat cells store energy, then introduce experimental studies and hypotheses as we delve into complex areas like fat cell growth triggers. This method ensures clarity while exploring new ideas, especially for those who’ve struggled with weight and wondered why maintaining a healthy balance is so challenging. I aim to make the science of fat accessible, breaking down terms like adipocytes and triglycerides for readers new to biology.

This series will follow a logical path, zooming in from a fat belly—the visible layer we all recognise—to adipose tissue, the body’s fat storage system. We’ll then examine adipocytes (fat cells), which contain lipid droplets packed with triglycerides. Finally, we’ll break triglycerides into glycerol and FFAs. Each step connects the external signs of fat to microscopic processes, offering insights into weight management.

Here’s what’s coming up:

• Part 2: Adipose hypertrophy vs. mitosis—how fat cells expand or multiply, and what drives these processes.
• Part 3: Inside lipid droplets—beyond fat, including proteins and vitamins.
• Part 4: Origins of glycerol and FFAs—from diet to body processes.
• Part 5: A summary with practical tips for health and wellbeing.

My approach is to simplify the science before exploring theoretical areas. For example, Part 2 will compare adipose hypertrophy (fat cells growing larger) to mitosis (fat cells multiplying), like deciding if a balloon is inflating or if more balloons are added. Everyday examples, like how a high-calorie diet or sedentary lifestyle affects fat storage, will keep it relatable. This series is for anyone wanting to understand fat’s role in the body, whether for weight loss or health.

So, grab a coffee, and let’s explore the science of fat together. Next up: how fat cells grow and multiply.