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Think Big (Costco Big)

For the first time ever, Doctor’s Best gummies are available on

Get up to $5 off today.

A limited-time offer.



Our #1 best-selling line.

Our High Absorption Magnesium is hands down our most popular product. This supplement promotes restful sleep and muscle relaxation—two things almost all of us need help with. Magnesium is essential in more than 300 enzyme systems that support biochemical functions, but approximately 75% of Americans are deficient. Alarming, right? Let us help ensure you get just the right amount of this magnificent mineral.

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Activate your mind

A superfood powerhouse for focus, memory and mood.

At Doctor’s Best, we’re committed to providing you with the most effective, rigorously studied supplements. That’s why we’re thrilled to introduce our Neurotrophic Brain Formula, scientifically formulated to promote brain health and Brain Derived Neurotrophic Factor (BDNF). We stimulate the production of this key neuroprotein through NeuroFactor®, an all natural, polyphenol-rich ingredient from the coffea arabica plant that’s extracted through a patented process. Paired with potent plant-based ingredients like green tea extract and turmeric extract (Curcumin C3 Complex®), this innovative formula helps enhance learning, memory and focus. It’s peace of mind in more ways than one.

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High Absorption Magnesium Glycinate Lysinate

"Life changing!!!!! This has literally changed my life! No more paralyzing anxiety, chronic pain, muscle spasms, or insomnia. If you suffer with depression and/or anxiety, no matter how bad it is, TRY THIS! It is a game changer. Wish I found out sooner…and I’m a physician!!! "

September 7,
High Absorption Magnesium Powder

"This is the best magnesium you can buy. Most pure, most nutrient per dollar based on independent tests. If you're serious about your health you should have this on hand even if you don't take it every day."

June 1,
High Absorption CoQ10 with BioPerine

"Fantastic product with a vegetable or vegetarian capsule! Love it!! I feel like this product truly helps me have a clearer mind. GREAT product at a great price and I wouldn't use any other brand. I love that their capsules are of a vegetable or vegetarian source. No gelatin. Thank you for a great product!!"

September 2019
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