For most healthy men, over-the-counter testosterone boosters do not raise testosterone in a meaningful way. A 2020 review of popular products found that most ingredient claims were not backed by evidence, and some products contained vitamins or minerals above safe upper limits. The exceptions are people who are low in a nutrient such as zinc or vitamin D, where correcting the gap can help. If you have symptoms of low testosterone, see your GP for a blood test rather than guessing with supplements.
Ingredient by ingredient
| Ingredient | What the evidence shows |
|---|---|
| Tribulus terrestris | The NIH says studies have not found that tribulus raises testosterone or improves performance. |
| Fenugreek | Some small, often industry-funded studies report modest changes; results are mixed. |
| Zinc | Helps only if you are low. Too much (over 40 mg a day from all sources) can lower copper status. |
| Vitamin D | Helps only if you are low. Your GP can test your levels. |
| Tongkat ali (Eurycoma longifolia) | A few small studies, mostly in men with low testosterone or stress; more research needed. |
| Ashwagandha | Small studies report modest changes; see our ashwagandha guide. |
| DIM, nettle, maca, epimedium | Little or no good evidence for raising testosterone in healthy men. |
What is in the products we stock
Some products in this category contain 30 mg of zinc and 10 mg of vitamin B6 per daily serve. That much zinc is close to the 40 mg daily upper limit once you add food and a multivitamin, and the TGA asks people to count vitamin B6 from all products.
Killer Labz Terminator Test ($99.95) gives, per 3 capsules, 1,000 mg tribulus, 200 mg tongkat ali (100:1), 150 mg epimedium, 200 mg DIM, 1,000 IU vitamin D3 and 5 mg zinc.
Like all over-the-counter products, it contains no hormones.
Safety checks before you buy
- Add up zinc, vitamin B6 and vitamin D across all your supplements.
- If you are a drug-tested athlete, be careful. Sport Integrity Australia found 35% of 200 supplements bought online contained a prohibited substance. Choose batch-tested products.
- Talk to your doctor first if you take medication or have a heart, prostate or hormone condition.
What actually supports healthy testosterone
- 7 to 9 hours of sleep a night.
- Regular resistance training.
- A healthy body weight, and enough total calories (very low-calorie diets can lower testosterone).
- Limiting alcohol.
- Seeing your GP if you have low libido, fatigue, low mood or erection problems. Healthy Male notes low testosterone is diagnosed with blood tests.
The bottom line
Testosterone boosters are not a shortcut. If you want to try one, choose a product with sensible doses, check the zinc and B6 totals, and set realistic expectations. Read our turkesterone guide, zinc guide and ashwagandha guide for more on individual ingredients.
Shop the products in this guide
Killer Labz Terminator TestBrowse the testosterone support range.
FAQs
Do testosterone boosters actually work?
For most healthy men, no meaningful rise in testosterone has been shown. A 2020 review found most product claims were not supported by evidence. Correcting a real deficiency, for example in zinc or vitamin D, can help, but a GP should confirm the deficiency first.
What is the best natural testosterone booster?
Sleep, resistance training, a healthy body weight, enough food and limited alcohol have the strongest evidence. Among supplements, zinc and vitamin D only help if you are low.
Are testosterone boosters safe?
Many are low risk at label doses, but some contain zinc or vitamin B6 close to or above safe upper limits, and a small number of products have been found to contain prohibited substances. Check every ingredient, count totals across all your supplements, and speak to your doctor if you take medication.
How do I know if I have low testosterone?
Symptoms can include low libido, erection problems, tiredness and low mood, but these have many causes. Low testosterone is diagnosed by your GP with blood tests, usually taken in the morning.
Sources: Clemesha and colleagues (2020), testosterone booster claims; NIH Office of Dietary Supplements, supplements for exercise and athletic performance; NHMRC Nutrient Reference Values, zinc; TGA, vitamin B6 safety update; Sport Integrity Australia supplement survey; Healthy Male, low testosterone.
Order online with Australia-wide delivery, free on orders of $99.99 or more, or visit a Supps247 store in Melbourne, regional Victoria or Brisbane to compare products in person. Members can use our member price match on full-priced items.
Prices and stock were checked on 22 October 2026 and can change at any time. Always read the label and follow the directions for use. If you have a medical condition, are pregnant or take regular medication, check with your doctor first.
