Increase testosterone naturally: 8 research-backed methods
Testosterone declines naturally by around 1 per cent per year after the age of 30. But lifestyle affects your levels at least as much as age does. Below are eight methods with support in the research, sorted by how much difference they actually make.
1. Sleep 7–9 hours – the most important step
Most of the day's testosterone is produced during sleep. In a 2011 study (University of Chicago), levels dropped by 10–15 per cent in young men who slept five hours a night for a week.
Prioritise regular times and a cool, dark bedroom. If you want concrete routines, we've collected them in our guide to sleeping better.
2. Lift heavy and train for strength
Strength training with large muscle groups gives a clear, if short-lived, rise straight after the session. The combination of regular strength training and less belly fat is what delivers the long-term effect.
- Compound lifts: squats, deadlifts, bench press, rows
- 2–4 sessions per week
- Heavy weights, 5–8 reps, with good technique
3. Keep a healthy weight
Belly fat converts testosterone into oestrogen via the enzyme aromatase. The more belly fat, the lower the testosterone – and the relationship runs both ways. A weight loss of 5–10 per cent can raise levels measurably in men who are overweight.
4. Get enough zinc
Zinc is needed for normal testosterone production, and deficiency lowers levels. Zinc contributes to the maintenance of normal testosterone levels in the blood (EFSA). Good sources are meat, shellfish, eggs and pumpkin seeds. Read more about zinc and testosterone.
Testorin combines shilajit 2000 mg, KSM-66 1500 mg and zinc, which contributes to the maintenance of normal testosterone levels in the blood.
See current price »5. Make sure your vitamin D is sufficient
Many people at northern latitudes run low on vitamin D during the winter months. Observational studies link low vitamin D to lower testosterone, but the intervention studies are mixed. A supplement of 10–20 µg per day over winter is reasonable for most people.
6. Cut down on chronic stress
Persistently elevated cortisol works against testosterone. Cortisol and testosterone often move in opposite directions. Simple tools: walks, breathing exercises and actually taking breaks. Some also choose adaptogens – see supplements for stress.
7. Eat enough fat and protein
Very low-fat diets can lower testosterone somewhat. Aim for a balanced diet with monounsaturated fat (olive oil, nuts), enough protein and the essential vitamins and minerals. Extreme keto or zero-fat diets are not necessary.
8. Limit alcohol
Large amounts of alcohol lower testosterone and disrupt sleep – a double drawback. The odd glass probably makes little difference, but a regularly high intake affects both production and recovery.
Can herbs and supplements help?
A few plants have support in smaller studies, but the effect is modest compared with sleep and training. Ashwagandha (KSM-66) has in some studies been linked to better stress management and, in some cases, higher testosterone in men, particularly those who train. Shilajit and tribulus have also been studied, but the evidence base is thinner.
Think of supplements as a complement once the basics are already in place – not as a replacement for them. Take a closer look at ashwagandha in our article on ashwagandha and stress.
Common mistakes to avoid
Much of it comes down to no longer working against your body.
- Chronically too little sleep – no remedy makes up for it
- Extreme dieting or a zero-fat diet over a long period
- Overtraining without recovery
- A regularly high alcohol intake
- Chasing quick "boosters" instead of the basics
What makes the biggest difference?
| Method | Expected effect |
|---|---|
| Sleep 7–9 h | Large |
| Strength training + healthy weight | Large |
| Correcting zinc/vitamin D deficiency | Medium (if deficient) |
| Less stress and alcohol | Medium |
If you want to compare supplements, we have a round-up at best testosterone supplements, and clear signs of low levels are covered in our article on low testosterone: symptoms in men. Also see the full men's health range.
Frequently asked questions
How quickly can you raise testosterone naturally?
Better sleep can affect your levels within a few days, while the effect of training and weight loss builds up over weeks to months. Expect at least 8–12 weeks before you see a stable difference. Consistency over time always beats quick fixes, and several habits together make the biggest impact.
Do over-the-counter testosterone supplements work?
Food supplements don't contain testosterone, but nutrients such as zinc and vitamin D that are needed for normal production. They help above all if you have a deficiency. They should not be confused with anabolic steroids, which are drugs with entirely different risks and require medical supervision.
Do sugar and fast carbs lower testosterone?
A single meal lowers levels temporarily, which is normal. The problem comes when a high sugar intake leads to weight gain and swinging blood sugar over time. A diet rich in vegetables, protein and fibre keeps both weight and levels more stable.
Do healthy men need to test their testosterone?
Not routinely. A blood test is warranted if you have clear symptoms such as persistent tiredness, reduced libido and low mood. Talk to your doctor, who will measure in the morning when levels are at their highest. A single low reading is always confirmed with a repeat test.