Life Extension vs Pure Encapsulations Melatonin (2026): The Low-Dose Tier

Life Extension's capsule states 300 mcg. Pure Encapsulations' states 0.5 mg, which is 500 mcg. In absolute terms that is two tenths of a milligram apart, an amount so small it sounds like rounding error against a 10 mg gummy. In proportional terms Pure Encapsulations delivers about 67 percent more melatonin than Life Extension, which at this end of the shelf is the difference between the two bottles.

The general guidance commonly cited by sleep clinicians is the lowest amount that helps, often described as 0.5 to 3 mg. On that framing, Pure Encapsulations sits exactly at the bottom of the range and Life Extension sits below it. Neither position is better on its face. Someone stepping down from a 5 mg tablet who wants the smallest step they can take has a reason to start at 300 mcg; someone whose clinician named half a milligram should buy half a milligram rather than approximate it. What neither buyer should do is split capsules, because a capsule does not divide.

Life Extension is about 8 cents a night. Pure Encapsulations is about 21. Over a year of nightly use that is roughly $27 against $76, and the gap widens if you compare the smallest bottles rather than the best value in each line. Pure Encapsulations' cheapest route is the 180-count at $31.00, about 17 cents; Life Extension's cheapest per night at any amount is the 1 mg at $4.39 for 60, about 7 cents.

The honest counterweight is that this is a cheap category in absolute terms and the difference is about four dollars a month. If the formulation standard matters to you, four dollars a month is a small price. If it does not, you are paying it for nothing, and the third bottle on this page makes the point sharper still: Carlyle sells the identical 300 mcg for about 3 cents a night, roughly a seventh of Pure Encapsulations.

This is where Life Extension separates itself. Beyond the plain capsules at 300 mcg, 500 mcg, 1 mg, 3 mg and 10 mg, it publishes 6 Hour Timed Release at 300 mcg ($9.00) and at 750 mcg ($6.00), plus an IR/XR capsule at 1.5 mg ($9.00 for 60) whose title describes an immediate and an extended portion, and a 120-capsule IR/XR ($17.75, about 15 cents a night). Timed release at a fraction of a milligram does not exist anywhere else in this catalog. There is also a 3 mg citrus-vanilla liquid ($9.00) for anyone who wants to measure rather than count.

Pure Encapsulations answers with one release product, Melatonin-SR ($19.50 for 60, about 33 cents a night, amount not stated in the title), and a liquid at $37.00 for 1 fl oz that is the most expensive melatonin on this site by a wide margin. Time release is marketed for staying asleep rather than falling asleep, and we describe it that way rather than as proven to do anything; the comparison is time release vs immediate release melatonin.

Pure Encapsulations' entire proposition is what is not in the capsule. It is a practitioner-channel brand whose positioning is hypoallergenic formulation and a minimal excipient list, and buyers managing sensitivities, or following a clinician's specific recommendation, are buying that rather than the melatonin. We describe that positioning as the brand states it and make no claim about it beyond that. Life Extension's titles state the amount, the count and the format, and nothing about the shell or the excipients; both brands leave the detail to the Supplement Facts panel, which is where it belongs and where you should read it.

Neither subject's title states a third-party verification mark. That is worth flagging harder at this end of the shelf than anywhere else on this site. Published analyses have found melatonin content in supplements varying widely from the labeled amount, and at 300 mcg there is almost no room for variance before the labeled number stops describing the capsule. A USP, NSF or equivalent mark on a listing means an outside lab checked. Where you find one at these amounts, it is worth more than the price difference between these two bottles.

Life Extension is a direct-to-consumer supplement house with a very wide catalog and a research-forward voice; its melatonin line reads as though it were designed by someone who took the lowest-amount guidance seriously and then built every release profile around it. That is why it wins this page. It is the brand for the reader who arrived here after reading that 10 mg is far more than anyone needs and wanted to know what the alternative looks like.

Pure Encapsulations is a practitioner-channel brand: sold through clinicians, formulated for people with sensitivities, priced accordingly. It is the brand for the reader whose naturopath, functional-medicine physician or allergist named it, and for the reader who has had a reaction to a filler in something else and does not want to run that experiment again. Neither brand is the right default for a first bottle of melatonin, which is a job for a $7 drugstore product at 1 or 3 mg. Both are the right answer for a specific, informed buyer, and that is the distinction this page exists to draw.

You want the lowest amount a good brand sells: Life Extension Melatonin 300 mcg, $7.50 for 100, about 8 cents a night. It wins three of five axes.

A clinician named Pure Encapsulations, or you manage sensitivities: Pure Encapsulations Melatonin 0.5 mg, $12.50 for 60. Buy the 180-count at $31.00 instead if you take it regularly; it is about 17 cents rather than 21.

You take 300 mcg most nights and want it cheap: Carlyle Melatonin 300 mcg, $9.99 for 365, about 3 cents a night.

You want a low amount that lasts through the night: Life Extension 6 Hour Timed Release 750 mcg at $6.00, or the IR/XR 1.5 mg at $9.00 for 60. Nothing else at this amount does it.

You want to measure rather than count: the Life Extension 3 mg liquid at $9.00, with the dropper at whatever line you were given. Every buyer: do not split capsules, read the panel, and ask a pharmacist if you take prescription medication.