Top 3 Supplements for Sperm Health Backed by Science
If you’re trying to conceive and wondering what else you can do, here’s one crucial piece often overlooked: sperm health matters just as much as egg health.
Even if a semen analysis came back “normal,” it doesn’t always tell the whole story. Issues such as low motility, high DNA fragmentation, or subtle oxidative damage may still be present, and targeted supplements can help alleviate these concerns.
In this post, we’ll share the most evidence-backed supplements shown to support sperm health.
1. CoQ10 – The Sperm Energy Booster
Coenzyme Q10 (CoQ10) is essential for energy production inside the mitochondria of sperm cells. Sperm need this energy to swim effectively and reach the egg.
It’s also a powerful antioxidant, helping reduce oxidative stress that can damage DNA and impair fertilisation potential.
A 2025 meta-analysis involving 877 men found that CoQ10 supplementation significantly improved sperm count, motility, and morphology, while also enhancing hormone levels, including testosterone.
These findings make CoQ10 one of the most promising nutrients for supporting overall sperm function.
2. ALC – Fuel for Sperm Motility
L-Carnitine (LC) and its more absorbable form, Acetyl-L-Carnitine (ALC), are critical for transporting fatty acids into the mitochondria where sperm generate energy. This energy supports better movement and sperm structure.
Sperm with low motility or abnormal shape often struggle to fertilise the egg. That’s where LC comes in.
A 2025 systematic review found that ALC, alone or combined with LC, significantly improved sperm concentration, motility, and morphology in men with idiopathic infertility.
Additional studies also reported improvements in semen volume and overall sperm quality when L-Carnitine was part of a combined antioxidant formula.
3. NAC – Antioxidant Protection for Sperm DNA
N-acetyl-cysteine (NAC) is a precursor to glutathione, your body’s master antioxidant. It plays a powerful role in protecting sperm from oxidative stress, which can otherwise damage DNA and lower fertilisation potential.
A 2025 meta-analysis including over 1,400 men showed that NAC supplementation improved sperm volume, motility, and morphology, even in cases of unexplained infertility.
While NAC didn’t significantly impact hormone levels, it directly supported sperm quality, making it a promising choice when DNA fragmentation or oxidative damage is a concern.
Want to Learn More About Eating for Sperm Health?
Supplements are just one piece of the puzzle. What your partner eats every day also plays a massive role in the quality and function of sperm.
If you’d like to learn how to nourish sperm health through food and lifestyle, click here to read our full guide on fertility nutrition for men.
Bottom Line
- Improving sperm health is often the missing piece in many fertility journeys.
- Supplements such as CoQ10, ALC and NAC may help to improve sperm health.
- Remember, the best approach is always personalised. Working with a fertility dietitian can help to decide on the best supplements.
