Compare every L-Carnitine product across UK retailers on Suppio, ranked by true value - price per active dose, not pack size. Prices refreshed daily.
Amino acid derivative that transports fatty acids into mitochondria
We rank L-Carnitine by price per gram of active ingredient - not by pack size - so a bigger tub with a worse price per dose can't outrank a smaller one that's actually cheaper.
L-Carnitine is an amino acid derivative, which is a compound created from a basic building block of protein. Its primary role is to transport fatty acids (fats) into the mitochondria, which are the tiny power stations inside your cells that turn fuel into energy.
It is used to help the body burn fat for energy more efficiently. By moving fats into the cell power stations, it supports energy production during exercise and daily activity.
To create the supplement, manufacturers typically start with a chemical synthesis process that combines specific raw materials in a controlled environment. This results in a concentrated powder that is then measured and put into capsules or mixed into liquids for sale.
This ingredient is generally mid-range in price. This is because the chemical synthesis required to produce it is more complex than simple vitamin extraction, but there is enough global supply and competition among brands to keep costs from becoming premium.
| Purpose | Typical studied dose | Evidence |
|---|---|---|
| General supplementation | 500 mg to 2,000 mg per day | established |
| Carnitine deficiency | up to 8 grams daily | established |
| Exercise performance | 3 to 4 grams per day for 1 week, or 1 to 3 grams per day for 4 to 24 weeks | limited |
| Chronic heart failure | 1 gram per day to 6 grams per day for 7 days to 3 years | emerging |
| Mild cognitive impairment or mild Alzheimer's disease | 1.5 to 3.0 grams per day of acetyl-L-carnitine for 3 to 12 months | emerging |
Suppio matches identical products across UK retailers by barcode, then ranks by price per active dose rather than sticker price. Value rankings only ever include listings Suppio has independently verified against the live retailer page - unverified data is shown on each product’s own page but excluded from ranking.
Prices across our retailer network are refreshed at least daily.
Amino acid derivative that transports fatty acids into mitochondria
We rank L-Carnitine by price per gram of active ingredient - not by pack size - so a bigger tub with a worse price per dose can't outrank a smaller one that's actually cheaper.
Suppio matches identical products across UK retailers by barcode, then ranks by price per active dose rather than sticker price. Value rankings only ever include listings Suppio has independently verified against the live retailer page - unverified data is shown on each product’s own page but excluded from ranking.
Prices across our retailer network are refreshed at least daily.