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Doctors Best

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FAQs

Who owns Doctor's Best?

Doctor's Best is owned by Kingdomway USA Corp. / Xiamen Kingdomway Group. Kingdomway acquired Doctor's Best in June 2016 from North Castle Partners. The brand is headquartered in Tustin, California (2742 Dow Avenue). Kingdomway also owns the US manufacturing arm Vit-Best Nutrition.

Who makes Doctor's Best supplements?

Doctor's Best products are made in the United States. Company materials link the brand to Vit-Best Nutrition, a cGMP manufacturing facility in Tustin, California (2802 Dow Avenue), under the Kingdomway group. The consumer brand site is doctorsbest.com. GymStack is a UK retailer of the range.

How much magnesium is in Doctor's Best High Absorption Magnesium?

On brand Supplement Facts for the lysinate glycinate tablet line, a 2-tablet serving provides 200 mg elemental magnesium from 2,000 mg Albion TRAACS® magnesium lysinate glycinate chelate (100 mg elemental per tablet). The 120 veggie-cap product provides 105 mg elemental magnesium per 2-capsule serving (52.5 mg per capsule). Magnesium Citrate on GymStack lists 125 mg elemental magnesium per capsule. Magnesium contributes to normal muscle function and to a reduction of tiredness and fatigue when the product is at least a source of magnesium.

What is the difference between Doctor's Best High Absorption Magnesium and Magnesium Citrate?

High Absorption Magnesium uses a magnesium lysinate glycinate amino-acid chelate (Albion TRAACS®). Magnesium Citrate uses magnesium citrate salt at 125 mg elemental magnesium per capsule on the brand panel. Both can provide a source of magnesium for authorised claims such as normal muscle function and reduction of tiredness and fatigue. This hub does not rank one form above the other — choose by the form and serving size you want and read the pack.

How much CoQ10 is in Doctor's Best High Absorption CoQ10?

The brand panel for High Absorption CoQ10 with BioPerine 100 mg lists 100 mg coenzyme Q10 (ubiquinone) plus 5 mg BioPerine® (black pepper extract) per capsule. GymStack also stocks 200 mg, 300 mg and 400 mg sizes. There is no authorised Great Britain health claim for CoQ10, so this page lists amounts only. CoQ10 supplements are not a replacement for prescribed medicines.

What is Doctor's Best Ubiquinol with Kaneka?

It is the reduced form of CoQ10. The brand panel for the 100 mg softgels lists 100 mg Kaneka Ubiquinol™ per softgel, with a gelatin softgel shell and oils/waxes. It is a separate SKU from the ubiquinone High Absorption CoQ10 line. No authorised GB CoQ10 health claim is used on this hub.

How much vitamin D is in Doctor's Best Vitamin D3 5000 IU?

Each softgel provides 125 mcg (5,000 IU) vitamin D3 as cholecalciferol, in extra-virgin olive oil, per the brand panel. Softgels use gelatin (not vegan). GymStack also stocks 2,000 IU and 1,000 IU sizes. Vitamin D contributes to the maintenance of normal bones and to the normal function of the immune system when the product is at least a source of vitamin D. Do not exceed the labelled dose.

Does Doctor's Best Glucosamine Chondroitin MSM contain shellfish?

Yes, on the brand Glucosamine Chondroitin MSM with OptiMSM panel: it contains shellfish (crab and shrimp shells). Per 4 veggie capsules that panel lists 1,500 mg glucosamine hydrochloride potassium sulfate, 1,200 mg chondroitin sulfate sodium and 1,000 mg OptiMSM®. Do not use if you have a crustacean allergy. This hub does not make joint-health claims for glucosamine, chondroitin or MSM.

Is Doctor's Best MSM with OptiMSM vegan?

The MSM powder with OptiMSM (250 g) brand panel lists only methylsulfonylmethane (OptiMSM) — 3,000 mg per 3-scoop serving — with no other ingredients, and is positioned as vegan. Tablet and capsule MSM / glucosamine stacks can differ (glucosamine chondroitin stacks may contain shellfish). Always read the individual label. No authorised GB joint or beauty claim for MSM is used here.

How much zinc is in Doctor's Best High Absorption Zinc?

High Absorption Zinc Bisglycinate provides 50 mg elemental zinc as zinc bisglycinate chelate (Albion) per veggie capsule on the brand panel. That is a high dose versus the 10 mg NRV — usually short-term or practitioner-advised. Zinc contributes to the normal function of the immune system and to the maintenance of normal hair, nails and skin when the product is at least a source of zinc. PepZin GI (zinc-L-carnosine) is a different formula.

Does Doctor's Best Vitamin K2 use MenaQ7?

Yes. Natural Vitamin K2 MK-7 listings use MenaQ7® menaquinone-7. The 100 mcg capsule provides 100 mcg vitamin K2; the plus-D3 capsule provides 180 mcg vitamin K2 with 25 mcg (1,000 IU) vitamin D3. If you take warfarin or another anticoagulant, check with a doctor before using vitamin K2. Vitamin K contributes to normal blood clotting and to the maintenance of normal bones when the product is at least a source of vitamin K.

Where is Doctor's Best based?

Tustin, California, USA. Company profiles and brand releases list headquarters at 2742 Dow Avenue, Tustin, CA 92780. The brand was founded in 1990 and has been part of the Kingdomway group since 2016. GymStack ships Doctor's Best products as a UK retailer.

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