Life Extension Melatonin 300 mcg review

Life Extension Melatonin 300 mcg is on this list for its dose. At 300 mcg, a tenth of the 3 mg most rivals use, it suits people who want to start with the least melatonin. The page describes it as gently promoting sleep at a low dose, and each vegetarian capsule contains only melatonin, microcrystalline cellulose, a cellulose capsule and silica. The bottle holds 100 capsules, which the page lists as a 100 day supply, at a regular price of $7.50, about $0.08 a night. AutoShip takes another 10% off and ships free, though some sale prices only show after signing in. Directions say to take one capsule 30 to 60 minutes before bed and not to exceed the recommended dose. If 300 mcg is not enough, Life Extension sells 500 mcg, 1 mg, 3 mg and 10 mg versions, so you can move up without switching brands. There is no outside certification named on the page.

Who it is for

people who want a low melatonin dose

Price

$7.50 regular price for 100 capsules; AutoShip saves 10%.

Reg. Price: $7.50
Quoted from the vendor pricing page on November 14, 2026.

Key features

• 300 mcg of melatonin per 1-capsule serving
• 100 vegetarian capsules, a 100 day supply
• Also sold in 500 mcg, 1 mg, 3 mg and 10 mg versions
• Gluten free, non-GMO and vegetarian
• Directions: 1 capsule 30 to 60 minutes before bedtime

Strengths and weaknesses

• Strength: About $0.08 a night at the regular price
• Strength: The lowest dose on this list, for people who want to start small
• Strength: AutoShip takes 10% off with free shipping
• Weakness: No third-party certification named on the page
• Weakness: Sale prices need an account sign-in to see
• Weakness: Page URL says 3 mg, so check the strength before you add it to the cart

Key facts

• Main ingredient: Melatonin 300 mcg
• Format: Vegetarian capsule
• Supply: 100 days
• Other strengths: 500 mcg, 1 mg, 3 mg, 10 mg
• Price per night: About $0.08

Where it ranks

Life Extension Melatonin 300 mcg is No. 3 in our Best Sleep Supplements verdict.