Best L-Carnitine vendors in 2026
Buying L-Carnitine: what the field looks like
We track 11 in-stock L-Carnitine listings across 8 US retail vendors, and re-read every one of them each night. Ranking below is by cost per milligram, which is the only figure that compares a 5mg vial against a 10mg one honestly.
The cheapest source works out at $0.01/mg against a median of $0.01/mg across the field — 50% less for the same milligram of the same compound. That gap is why this page exists: on L-Carnitine the vendor you pick matters more than the size you buy.
The lowest total cart is $36.00 at chameleonpeptides. That is the cheapest way to hold L-Carnitine at all, which is a different question from the best cost per milligram — the two are the same vendor only sometimes.
Top 5 L-Carnitine vendors at a glance
| # | Vendor | Size | Cheapest vial | Per mg | vs median | Score | |
|---|---|---|---|---|---|---|---|
| 1 | chameleonpeptides | 6000mg | $36.00 | $0.01 | 50% under | 5.8/10 | View → |
| 2 | penguinpeptides | 6000mg | $45.00 | $0.01 | 38% under | 3.8/10 | View → |
| 3 | aiopeptides | 5000mg | $51.20 | $0.01 | 15% under | 5.5/10 | View → |
| 4 | alphaomegapeptide | 5000mg | $60.00 | $0.01 | — | 4.7/10 | View → |
| 5 | ionpeptide | 500mg | $40.00 | $0.08 | — | 4.5/10 | View → |
All 8 ranked L-Carnitine vendors
chameleonpeptides
6000mg$36.00$0.01/mgpack: 10× → $0.01/mg5.8/10Get deal →Prices sit in the 55th percentile of each compound's field — cheaper than 45% of listings. · Cheapest source we track on 2 compounds. · 23 compounds, 117 live listings. · 77% of listings in stock at the last check. · Certificates published on 79% of listings, newest 1 months old. · Tracked for 2 days.
penguinpeptides
6000mg$45.00$0.01/mg3.8/10Get deal →Prices sit in the 78th percentile of each compound's field — cheaper than 22% of listings. · 25 compounds, 41 live listings. · 98% of listings in stock at the last check. · No certificates published that we could find. · Tracked for 2 days.
aiopeptides
5000mg$51.20$0.01/mg5.5/10Get deal →Prices sit in the 49th percentile of each compound's field — cheaper than 51% of listings. · 36 compounds, 38 live listings. · 100% of listings in stock at the last check. · Certificates published on 3% of listings, newest 8 months old. · Tracked for 2 days.
alphaomegapeptide
5000mg$60.00$0.01/mg4.7/10Get deal →Prices sit in the 61th percentile of each compound's field — cheaper than 39% of listings. · Cheapest source we track on 1 compound. · 28 compounds, 35 live listings. · 96% of listings in stock at the last check. · Certificates published on 9% of listings, newest 15 months old. · Tracked for 2 days.
ionpeptide
500mg$40.00$0.08/mg4.5/10Get deal →Prices sit in the 48th percentile of each compound's field — cheaper than 52% of listings. · Cheapest source we track on 1 compound. · 18 compounds, 41 live listings. · 85% of listings in stock at the last check. · No certificates published that we could find. · Tracked for 2 days.
goalphalabs
500mg$41.99$0.08/mgpack: 10× → $0.06/mg6.6/10Get deal →Prices sit in the 22th percentile of each compound's field — cheaper than 78% of listings. · Cheapest source we track on 12 compounds. · 39 compounds, 111 live listings. · 98% of listings in stock at the last check. · No certificates published that we could find. · Tracked for 2 days.
ezpeptides
500mg$48.00$0.10/mg6.6/10Get deal →Prices sit in the 62th percentile of each compound's field — cheaper than 38% of listings. · 32 compounds, 37 live listings. · 96% of listings in stock at the last check. · Certificates published on 100% of listings, newest 3 months old. · Tracked for 2 days.
coffeeandpeppers
600mg$69.99$0.12/mg5.0/10Get deal →Prices sit in the 47th percentile of each compound's field — cheaper than 53% of listings. · Cheapest source we track on 1 compound. · 30 compounds, 62 live listings. · 83% of listings in stock at the last check. · Certificates published on 2% of listings. · Tracked for 2 days.
Bulk and multi-vial pricing
Ranked by cost per milligram. A pack is always a bigger cart than a single vial — the question these answer is whether it is cheaper per milligram, not whether it is cheaper.
L-Carnitine vial sizes compared
Vendors sell L-Carnitine in 4 sizes. Cost per milligram is not the same across them, so the biggest vial is not automatically the best value.
| Vial size | Vendors | Cheapest | Best per mg | At |
|---|---|---|---|---|
| 500mg | 3 | $40.00 | $0.08 | ionpeptide |
| 600mg | 1 | $69.99 | $0.12 | coffeeandpeppers |
| 5000mg | 2 | $51.20 | $0.01 | aiopeptides |
| 6000mg | 2 | $36.00 | $0.01 | chameleonpeptides |
Blends containing L-Carnitine
Separate products, priced per mg of total peptide across every compound in the vial. Not comparable to the L-Carnitine prices above.
L-Carnitine price history
Median cost per milligram across the field, one point per day we crawled.
How we rank these vendors
Vendors are ordered by cost per milligram of their cheapest in-stock single vial. Nothing else moves the order — not commission, not whether a vendor has a partner programme, not how long we have tracked them.
The score beside each vendor is a listing-quality score, not a purity or trust score. We have no laboratory and we do not test anything. It is built from figures we measure ourselves: where the vendor's prices sit inside each compound's own field, how many compounds they carry, how reliably their listings stay in stock, and how many certificates they publish. Every input is shown beside the number.
Prices older than 48 hours are dropped rather than shown stale, so a vendor missing from this page is usually a vendor whose site we could not read last night.
Common questions
Who sells L-Carnitine cheapest right now?
chameleonpeptides, at $0.01 per milligram and $36.00 for the cheapest single vial. That is across 8 US retail vendors, checked within the last 24 hours.
How much should L-Carnitine cost per mg?
The median across 8 vendors is $0.01/mg. Anything at or under that is a fair price; the cheapest we can find is $0.01/mg, and the top of the market runs to $0.11/mg.
Which vial size of L-Carnitine is the best value?
Vendors sell L-Carnitine in 4 different vial sizes, and the cost per milligram is not the same across them. The table above prices each size separately so you can see which one is actually cheaper per mg rather than per vial.
Are multi-vial kits cheaper?
2 vendors sell L-Carnitine in multi-vial packs. They are usually cheaper per milligram and always a larger cart, so they are ranked separately above rather than mixed into the single-vial list.
Can I buy L-Carnitine in a blend?
Yes — 1 blend recipe we track contain L-Carnitine. A blend is a separate product and its cost per milligram counts every compound in the vial, so it cannot be compared to the L-Carnitine prices on this page.
Do you sell L-Carnitine?
No. We sell nothing and ship nothing. Every link goes to the vendor's own store, and some of them pay us a commission — those are labelled on the row, and commission never affects the ranking, which sorts on price alone.