How to lower your biological age, naturally.

The five levers, ranked by effect size

Across the largest longitudinal studies on biological-age trajectories, the same five inputs keep emerging — in roughly this order of impact:

1. Sleep quality and regularity.
2. Resistance training (and the lean tissue it builds).
3. Protein-anchored nutrition.
4. Glucose stability.
5. Stress regulation.

If you do nothing else this year except move all five from "occasional" to "consistent," your TrueAge trajectory will bend. That isn't marketing — it's what the data shows.

Lever 1: Sleep quality, every night, on the same schedule.

What to do this week

• Fix the wake time first. Same time, every day. The bedtime will adjust naturally within 10–14 days.
• Get 10 minutes of bright outdoor light within 30 minutes of waking. Single highest-leverage circadian intervention available.
• Stop caffeine 8–10 hours before bed. The "but I can fall asleep fine on coffee" group still loses deep sleep — they just don't notice.
• Cool the room. 18–19°C / 64–67°F for most people.

What to track

Wake time consistency (variance under 30 minutes is the goal), total sleep duration, and if you have a wearable, percentage of nights with deep sleep + REM both above the 25th percentile of your baseline.

Lever 2: Resistance training, twice a week, non-negotiable.

Why this lever ranks so high

Skeletal muscle is the most metabolically active tissue you have. More muscle = more glucose disposal, better insulin sensitivity, better recovery, lower frailty risk later. The aging body sheds muscle silently unless something pulls it back. Resistance training is that something.

What to do this week

• Two 45-minute sessions, hitting all major movement patterns (squat, hinge, push, pull, carry).
• Progressive overload — track the load and add a rep or kilo each week.
• Don't overcomplicate the program. A simple 5-exercise full-body session twice a week beats a complex program done sporadically.

Lever 3: Protein anchoring, every meal.

Most adults eat well under the protein their body actually needs to maintain muscle, recover from training, and signal satiety. A useful target for most healthy adults is around 1.6 g of protein per kg of body weight per day, distributed across 3–4 meals with at least 30 g per meal.

Practical anchor points

• Breakfast: 30–40 g protein within an hour of waking (eggs, Greek yogurt, cottage cheese, whey).
• Lunch and dinner: 30–50 g animal or high-quality plant protein each.
• Post-training: 30 g within an hour of resistance work, ideally with carbohydrate.

If you're already there, don't fix what isn't broken. If you're under-eating protein, this single change moves more metrics than almost any supplement you could add.

Lever 4: Glucose stability — the quiet aging accelerator.

Large post-meal glucose excursions drive inflammation, oxidative stress, and faster methylation aging. You don't need to be diabetic for this to matter — sub-clinical glucose volatility shows up in epigenetic clocks years before HbA1c does.

What helps, in order of leverage

• Walk for 10 minutes after meals. Single highest-leverage glucose intervention. Cuts post-meal peak meaningfully.
• Order protein and vegetables before carbohydrate when you can. Sequence affects the curve.
• Strength train. See lever 2 — muscle is glucose's destination.
• Try a two-week CGM trial if curiosity is high. It will reveal foods that are quietly spiking you that you'd never have suspected.

Lever 5: Stress regulation — measured, not aspirational.

Chronic cortisol pulls on every other lever — sleep architecture, glucose response, recovery, even motivation to train. "Lower your stress" is useless advice; measuring stress load and acting on the measurement is the practical version.

What works

• Daily HRV trend. A morning HRV that's trending down for 3+ days is a real signal — pull back on training intensity, sleep more, reduce stimulants.
• Box breathing (4-4-4-4) for 1–5 minutes lowers acute sympathetic load reliably. Free, evidence-backed, and works in 60 seconds.
• Daily check-in. A 20-second subjective rating of energy, clarity, mood, body and recovery — tracked over time — catches downturns weeks before labs do. (This is what Jevity's FeelAge feature is built around.)

What to skip, honestly

• Elaborate "biohacking" stacks — until the five levers above are running consistently. Stacking ten supplements on top of inconsistent sleep is a tax, not a strategy.
• Single biological-age readings without trend context. One number is noise. Six months of trend is signal.
• Anything sold with "X reverses aging" framing. Aging isn't reversed; trajectory is bent. Be skeptical of language that implies otherwise.

This article is general education, not medical advice, diagnosis, or treatment. Effect sizes vary by individual. Consult a licensed physician before significant changes to medication, supplements, fasting, or training. Jevity does not sell prescription medication; partner clinics are independent licensed providers.