Natural Vitality CALM Magnesium Powder review

Natural Vitality CALM is the best-known magnesium drink in US stores, and the brand's own footer cites SPINS natural channel sales data for its ranking. The orange powder delivers 325 mg of magnesium as ionic magnesium citrate per serving, the highest dose on this list, and the 16 oz tub is listed as a 113 day supply for $35.79, about $0.32 a day. A subscription takes 10% off and can be paused or canceled. The range is wide: there are stick packs, gummies, a MAXCALM line and CALM Sleep with melatonin for people who want a combined product. The form is the main reason it ranks mid-list for sleep. Citrate is a different compound from glycinate, and Thorne's own FAQ notes that citrate is often used for bowel regularity because it draws water into the intestines. People with a sensitive stomach may prefer a glycinate. The page also does not name a third-party certification, though it carries a 60-Day Money Back Guarantee.

Who it is for

people who like a flavored evening drink

Price

$35.79 one-time for the 16 oz tub (113 days supply); Subscribe & Save 10% brings it to $32.21.

Buy Once $35.79
Quoted from the vendor pricing page on November 13, 2026.

Key features

• 325 mg of magnesium as ionic magnesium citrate per serving
• 16 oz tub listed as a 113 days supply; 8 oz tub as 54 days
• Orange flavored drink mix
• 60-Day Money Back Guarantee
• Stick packs, gummies and a melatonin version sold in the same range

Strengths and weaknesses

• Strength: $35.79 for 113 days, about $0.32 a day
• Strength: Highest magnesium per serving on this list at 325 mg
• Strength: Subscriptions can be paused or canceled anytime
• Weakness: Magnesium citrate rather than glycinate; Thorne notes citrate is often used for bowel regularity
• Weakness: Fizzy drink has to be mixed each night
• Weakness: The page names no third-party certification

Key facts

• Form: Ionic magnesium citrate powder
• Magnesium per serving: 325 mg
• Supply: 113 days (16 oz)
• Guarantee: 60 days
• Cost per day: About $0.32

Where it ranks

Natural Vitality CALM Magnesium Powder is No. 4 in our Best Magnesium Supplements verdict.