Over the counter
Published: human trials
Established use
L-Carnitine: dosing, timing and what to expect
Concentrated in the epididymis, where it fuels sperm maturation and motility. One of the better-supported supplements in male fertility work.
Also known as acetyl-L-carnitine, ALCAR, LCLT
Quick reference. Everything you need to run L-Carnitine —
dosing, frequency, reconstitution math for the vial sizes people actually buy,
and what it stacks with. For anything specific to your situation,
ask the Guru.
L-Carnitine quick start
- Route
- Oral
- Typical dose
- 1–3 g daily
- Frequency
- Daily
- Half-life
- Around 15 hours.
- Cycle
- 3–6 month blocks for fertility.
These are the numbers people actually run, drawn from the published record and from
what the community has settled on over time. Educational reference, not medical
advice — a starting point to work from, and one you can adjust as you learn how you
respond.
How to run it
- How often
- Daily
- Cycle length
- 3–6 month blocks for fertility.
- Half-life
- Around 15 hours.
- Route
- Oral
Consistency matters more than perfect timing. Pick a slot in your day you will
actually keep, and let DoseIQ handle the rest.
What to expect
Most people tolerate L-Carnitine well. Here is what is worth knowing going in, so nothing catches you by surprise.
Gut bacteria convert carnitine to TMAO, which has been associated with cardiovascular risk — the size of that risk is genuinely unsettled and worth knowing about rather than dismissing. Doses above 3 g cause a fishy body odour that people find alarming. As with anything for fertility, judge it over months, not weeks.
Preparing it
L-Carnitine does not need reconstituting — it comes ready to use.
This page is an educational research reference and is not medical advice. Dose figures reflect the published record and what the community has converged on — starting points to weigh, not instructions. Consult a qualified healthcare provider before starting any protocol.