Prime Diet 1.0: A Practical Nutrition Guide (The Second Most Valuable Article So Far)

With this article, I’m concluding our current phase of exploration into the three major macronutrients.

Over the course of 20 in-depth entries, I’ve explored the mechanisms, myths, and actionable strategies around nutrition. Now, I’ve distilled the most critical insights and practical recommendations into this comprehensive guide — Prime Diet 1.0.

Every sentence here is a conclusion. Every line matters. If you’re looking for details or background, please refer back to the earlier articles.

The Three Macronutrients

Carbs, fats, and proteins — we need all three. But from a metabolic standpoint, fats (if you choose the right ones) may be the gentlest.

Why?

Carbs cause significant fluctuations in blood glucose and insulin levels.
Protein metabolism requires processing nitrogenous waste and stimulates growth factors, which can indirectly accelerate aging.
Fats, on the other hand, don’t spike glucose or insulin (compared to equal-calorie carbs/proteins), don’t produce nitrogen waste, don’t over-activate growth pathways, and — when combined with aerobic exercise — can enhance mitochondrial efficiency.

An individual’s target metabolic energy (in kcal) can be calculated based on factors such as sex, age, height, weight, ethnicity, and activity level. Let’s take my case as an example. I’m a 42-year-old Asian male, 180 cm tall, 70 kg, light physical activity. I need roughly 2,000+ kcal/day to maintain my metabolism.

Here’s how I allocate that energy across macros:

First, determine protein intake by weight and activity. I aim for ~1.5 g/kg/day — that’s 105g protein, or ~420 kcal, making up 20% of total calories.
The remaining 80% (~1,600 kcal) is split between carbs and fats, with a preference toward fats to leverage their metabolic gentleness. A typical split: fats 40–45%, carbs 35–40%.

But here’s the key: quality matters more than ratios. Before obsessing over percentages, make sure every gram of carbs, fat, and protein you eat is high-quality.

Carbs

One sentence sums it up: Low GI and Low GL.

GI (Glycemic Index) measures how fast carbs raise your blood sugar.
GL (Glycemic Load) measures how much total sugar enters your system.

What to avoid:

High-sugar diets — they spike glucose and insulin, raise LDL-C, promote arterial plaque, and trigger inflammation.
Free sugars like sucrose (glucose + fructose), found in sodas, sugary snacks, flavored coffee/tea drinks, sweetened yogurt, etc.
Refined carbs — white rice, white bread, noodles, pastries, cakes, buns.

What to eat: more whole grains, root vegetables, legumes, and vegetables that are low in both GI and GL and rich in fiber

Whole grains: steel-cut oats (cooked 30–40 mins — not instant or rolled oats), quinoa, brown rice.
Starchy roots (in moderation): pumpkin, yam — still watch GL.
High-fiber legumes: hummus, lentil soup.
Non-starchy vegetables: broccoli, spinach, cauliflower, celery — rich in carbs, fiber, and micronutrients.

If you can’t give up refined staples like rice, pasta, or mashed potatoes:

Let them cool for 12–24 hours at 4°C after cooking. This creates resistant starch, which stabilizes blood sugar and benefits gut health.
Reheat gently, keeping the core temp under 60°C, to preserve the resistant starch structure.
Reheating can be done by microwaving on low to medium power for 30–60 seconds, or by placing the container of cold rice in warm water for a few minutes.

Sweet cravings?

As a transitional strategy, moderate amounts of sugar substitutes can be used in place of free sugars; prioritize natural sweeteners (such as erythritol, stevia glycosides, mogrosides, and allulose) over artificial ones.

Fruit?

Moderate intake of whole fruits is beneficial for health; juices, however, still contain excessive free sugars. If you choose to drink juice, opt only for nutrient-dense combinations (such as avocado and blueberry juice) to offset the negative health effects of free sugars.

Fats

1. Choosing the Right Cooking Oils

In the kitchen, the best all-around choices are the “three brothers”: extra virgin olive oil, avocado oil, and camellia oil — all high-quality fats with strong stability. Use palm oil, soybean oil, and corn oil sparingly: soybean and corn oils are unstable, while palm oil, though stable, is pro-inflammatory.

2. Saturated fats:

Keep below 10% of total calories — ideally under 5–6% for Prime Lifers (to manage ApoB and LDL-C). If needed, prioritize dairy-based saturated fat (e.g., full-fat milk).

3. Avoid fats like:

Trans fats (cakes, cookies, creamers) and reused frying oil (e.g., street food, hot pot oil reuse) completely

4. Omega-3 fats:

Actively supplement through fish oil, fatty fish, flaxseeds, chia seeds, etc., to balance the Omega-6:3 ratio.

5. Nuts:

Great source of healthy fats and micronutrients. Eat them unsalted and unsweetened.

6. Cooking principles:

Less stir-frying, more steaming/boiling. Use low to medium heat — high temps generate toxins and carcinogens.

7. Avoid reused oils:

Especially in hotpot or street skewers — unless you know for sure, skip it.

8. Skip BBQ:

Charred meat contains harmful compounds.

9. Note:

For your visceral fat and obesity risk, blame refined carbs, not fat. Excess sugar is converted in the liver into palmitic acid — a highly inflammatory fat.

Protein

1. Dose it right:

Too little? You lose muscle and repair capacity. Too much? Burdens the kidneys with nitrogen waste.

Guidelines:

General adults: 1.2–1.5 g/kg/day
Sedentary: 1.0–1.2 g/kg/day
Strength training: 1.5–2.0 g/kg/day
Healthy elderly: 1.0–1.2 g/kg/day; Combating sarcopenia: 1.2–1.5 g/kg/day; Malnourished elderly: up to 2.0 g/kg/day

Post-resistance training supplements:

After resistance training: ~25g whey protein (2.5g leucine) + half a banana for muscle synthesis.

Before bed: add slow-release casein protein to support nighttime growth hormone–driven repair.

Everyday meals:

Apart from post-resistance training supplements, prioritize plant proteins (such as various legumes or soy products) in your daily meals.

2. Animal proteins

Animal proteins are high-quality and efficiently absorbed, but they also stimulate growth factors such as mTOR and IGF-1, which promote aging in adulthood.

Targeted animal protein use is okay:

Post-workout whey
Pre-bed casein
Moderate amount of white meat (chicken, fish; prioritize Omega-3 fish)

Avoid:

Red meat (such as beef, lamb, and pork, which are nutrient-dense but classified as Group 2A carcinogens) — max 1–2x/week
Processed meats — Group 1 carcinogen
High-temp cooked meats — contain PAHs and HCAs, both Group 1 carcinogens

Fruit (Fructose)

Fructose is preferentially metabolized in the small intestine. Within the intestine’s metabolic capacity — about 10–15 g per meal and 40–50 g per day — fructose is gentler than glucose (it doesn’t raise blood sugar) and fuels efficiently via lactate, making it a strong substitute for refined carbs.
Once intake exceeds that intestinal threshold, fructose is shunted to the liver, where it bypasses phosphofructokinase (PFK) regulation and is rapidly converted into fat; a small portion also reaches the colon, disturbing the gut microbiome and harming health.
Whole fruit is beneficial — aim for 2–3 servings per day — but avoid free fructose whenever possible.
Favor berries, citrus, kiwifruit, and avocado — they offer solid nutritional value beyond fructose alone.
Go easy on juice. Even freshly pressed juice turns intracellular sugars into free sugars once cell walls are pulverized.
Use honey sparingly — it is, essentially, a natural source of free sugar.
If you do drink juice, a good option is avocado + blueberry; you can add a little apple or kiwi for natural sweetness.

Dietary Fiber

(a special kind of carbs)

Soluble fiber (lowers LDL, stabilizes glucose): steel‑cut oats (β‑glucan), chia seeds — 15 g/day.
Insoluble fiber (supports motility): leafy greens, celery, cauliflower — 15 g/day.
Fermentable fiber (prebiotic, gut‑protective, anti‑inflammatory): onion, garlic, chicory — 10–15 g/day.
Total fiber: 25–35 g/day.

Other Notes

Soy milk / bean dip: Excellent options when made from legumes. Both soy milk and cow’s milk can be part of a healthy diet. Just watch for bloating if legume intake is excessive (fermentation in the colon can increase gas).
Eggs: A near‑perfect, well‑balanced food — both whites and yolks are good. Don’t over‑worry about cholesterol and fat; 1–2 eggs per day is fine.
Milk / yogurt: Choose unsweetened products; don’t get hung up on full‑fat vs. low‑fat. (Note: many “plain” yogurts still contain free sugars like sucrose or glucose‑fructose syrup.) Keep total animal fats (saturated fat) and protein (growth‑factor stimulating) within reason — this applies to milk and eggs as well. Be mindful of lactose intolerance.

Plate Composition (by volume, not by calories)

For each meal (including staples): make half the plate vegetables; split the remaining half evenly among carbs, fats, and protein.
If you’re unsure how many carbs to include, err on fewer carbs and more quality fats. In East Asia especially, habitual carbs intake is high; even after cutting back, it likely won’t be “too low.”
Since fat has more than twice the calorie density of carbs or protein, a similar volume will naturally reflect the energy ratios described above.

Ongoing Monitoring

After adjusting your diet, keep tracking key personal markers — body weight, muscle mass, fasting glucose, lipids, liver and kidney function, and more. Use the feedback to fine‑tune your nutrition strategy over time.

One More Thing: The Most Valuable Article

The most valuable piece in this series is Entry #2 — the one where I lay out the vision, principles, and the overall Prime Life framework (of which nutrition is just one component):

“How to Achieve a Prime Life?”

Intervention recommendations are geared toward generally healthy individuals. If you have existing health conditions, always follow your doctor’s instructions.