--- product_id: 4236391 title: "Doctor's Best Fully Active Vitamin B Complex Supplement for Men & Women - Super Complex with Methylated B12 & Folate, B6, Biotin, Pantothenic Acid, & More, Energy Support Caps - 30 Veggie Capsules" brand: "doctor's best" price: "84 zł" currency: PLN in_stock: true reviews_count: 13 url: https://www.desertcart.pl/products/4236391-doctors-best-fully-active-vitamin-b-complex-supplement-for-men store_origin: PL region: Poland --- # 1000 mcg methylcobalamin B12 for max energy Quatrefolic® bioactive folate for superior absorption 30 vegan, non-GMO, gluten & soy-free capsules Doctor's Best Fully Active Vitamin B Complex Supplement for Men & Women - Super Complex with Methylated B12 & Folate, B6, Biotin, Pantothenic Acid, & More, Energy Support Caps - 30 Veggie Capsules **Brand:** doctor's best **Price:** 84 zł **Availability:** ✅ In Stock ## Summary > ⚡ Elevate your energy, sharpen your focus—because average just won’t do. ## Quick Answers - **What is this?** Doctor's Best Fully Active Vitamin B Complex Supplement for Men & Women - Super Complex with Methylated B12 & Folate, B6, Biotin, Pantothenic Acid, & More, Energy Support Caps - 30 Veggie Capsules by doctor's best - **How much does it cost?** 84 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/4236391-doctors-best-fully-active-vitamin-b-complex-supplement-for-men) ## Best For - doctor's best enthusiasts ## Why This Product - Trusted doctor's best brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Daily Convenience, Maximum Impact:** Just one capsule a day with food delivers comprehensive B-vitamin support to power your busy lifestyle. - • **Cellular Energy & Metabolism Boost:** Supports mitochondrial function and carbohydrate metabolism to keep your brain and body firing on all cylinders. - • **Clean, Vegan & Allergen-Free Formula:** Non-GMO, gluten-free, soy-free, and 100% vegan capsules designed for the mindful professional. - • **Power-Packed Methylated B12 & Folate:** Skip the conversion hassle—get instantly bioavailable B12 & folate for peak mental clarity and energy. - • **Clinically Researched & Trusted Brand:** Backed by 35+ years of science-driven quality, ensuring you get only the best for your health. ## Overview Doctor's Best Fully Active Vitamin B Complex delivers 1000 mcg of methylcobalamin B12 and bioactive Quatrefolic folate in a clean, vegan, non-GMO formula. Designed for optimal absorption and cellular energy support, this supplement fuels metabolism, brain function, and overall vitality with clinically backed ingredients in easy-to-take veggie capsules. ## Description The breakthrough features of this formulation include: supplies only the best-utilized b vitamin forms. Most b vitamin supplements use cheap forms that are not optimally utilized in the body. This formulation does not compromise-it provides generous amounts of the most active b vitamins. Substitutes naturally fully active folate for synthetic folic acid. Folic acid is an artificial folate that is difficult for the body to assimilate. This formulation instead provides the body's most fully active folate, MTHF (methyl-tetra-hydro-folate). Provides sufficient, fully active vitamin B12. Very few supplements provide sufficient amounts of active vitamin B12. This formulation provides 1000 micrograms of fully active B12 to help ensure excellent oral absorption. Thiamin ("vitamin B1") is fundamental to human metabolism because it is essential for the metabolism of oxygen. The microscopic "power plants" of our cells (mitochondria) require thiamin to generate energy, but elsewhere in the cells it is also required for energy generation. Thiamin is important for metabolizing amino acids, the building blocks of proteins, but is especially important for managing sugar and other carbohydrates, and can be depleted by high-carbohydrate diets. Thiamine even helps support the delicate blood vessels of the retina and other tissues in the presence of high levels of circulating blood sugar. This vitamin is absorbed only as thiamin (not as other thiamin vitamins) in the upper small intestine. Alcohol can impair the proteins that transport thiamin, and high alcohol consumption is linked to thiamine deficiency. The brain and other nervous tissues have especially high thiamin requirements. Other organs with high oxygen requirements, such as the heart, also have high demand for thiamine. Review: What a Steal!...Great Product!...Contains 100% methyl-Folate/Quatrefolic/5-MthF! - Thrilled to find methylated/co-enzyme/active B-Vitamins at such a great price. Methylated B vits. are fully active, your body does not have to 'convert' these in to a usable form - they are already fully absorbable & ready to get to work in your body - - unlike 'old-fashioned'! non-methylated B's (i.e.: B50 complexes & the like) which actually require your body to 'convert' those to a usable form, this process itself is difficult for the body/liver & more so for certain genetic 'mutants'! - Long story short - methylated/activated/co-enzyme B-Vitamins are far superior (my opinion!) & better absorbed than the kind of B-complexes you might find at your local drug-store or Gas Station .... I used to use Jarrow 'B-right' but they changed the formula to contain a mix of synthetic/fake Folic acid & 5-mthf, whereas the Doctors Best brand contains 100% Quatrefolic (5mthf) - so Doctors Best is my preferred choice now! .... I get a definite boost in energy & mental clarity .... I take these every day along side my Amino Acids - the B's ensure that the Aminos can do their job And of course a healthy daily intake of B's is essential for practically every process in the body & to help the Liver keep on humming-along! Two big thumbs up for Doctors Best fully Active B-complex! The product got here (Hawaii) very quickly - 2 days faster than anticipated arrival! desertcart outdoes itself yet again! Review: Very good w/o negative side effects - As a plant based eater, I have taken a vegan B12 supplement for years. Recently, I ran out and was “too busy” to order more. After a couple months, I noticed having low energy especially in the afternoons and then started having heart palpitations. I went to the doctor to be safe, and confirmed that everything was good except my B12 was on the bottom end of the “normal range.” I ordered this B complex, and within less than 2 weeks of taking it daily, the palpitations were gone and energy is coming back. Lesson learned. This is a great oral supplement and seems to be very effective without any negative side effects. ## Features - SUPER VITAMIN B COMPLEX: Our B complex vitamins for women and men include Vitamin C as ascorbic acid, thiamin, riboflavin, niacin, Vitamin B6, folate, Vitamin B12, biotin, and pantothenic acid - METHYLATED B12 & FOLATE: Fully Active B Complex provides Vitamin B12 as methylcobalamin along with Quatrefolic, a bioactive and highly absorbable form of folate for optimal support - ENERGY & CELLULAR SUPPORT: This unique, comprehensive formula offers high bioavailability and optimal support for energy production, cellular health, and overall well-being - SUGGESTED CAPSULE USE: Take 1 capsule daily with food, or as recommended by a nutritionally informed physician. This supplement is non GMO, gluten free, soy free, and vegan - DOCTOR'S BEST: Good nutrition starts with sound science. For over 35 years, we have been dedicated to providing only thoroughly researched, rigorously tested, and clinically-approved supplements ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00DWDZPBG | | Age Range Description | Adult | | Allergen Information | Gluten Free, Soy Free | | Best Sellers Rank | #17,757 in Health & Household ( See Top 100 in Health & Household ) #51 in Vitamin B-Complex Supplements #2,197 in Sales & Deals | | Brand | Doctor's BEST | | Brand Name | Doctor's BEST | | Color | No Color | | Customer Reviews | 4.6 out of 5 stars 3,922 Reviews | | Diet Type | Vegan | | Dosage Form | Capsule | | Flavor | Unflavored | | Global Trade Identification Number | 00753950002999 | | Item Dimensions | 2.13 x 2.13 x 3.75 inches | | Item Form | Capsule | | Item Nype Name | Fully Active B Complex | | Item Weight | 0.04 Kilograms | | Manufacturer | Doctor’s Best, Inc | | Manufacturer Part Number | DRB-00299 | | Model Name | Doctor ' S Best Fully Active Nongmo Gluten Free Vegan Count | | Model Number | DRB-00299 | | Number of Items | 1 | | Primary Supplement Type | B-Complex | | Product Benefits | Metabolism Improvement | | Specific Uses For Product | Immune Support, Skin | | UPC | 753950002999 | | Unit Count | 30 Count | ## Product Details - **Brand:** Doctor's BEST - **Diet Type:** Vegan - **Flavor:** Unflavored - **Item Form:** Capsule - **Primary Supplement Type:** B-Complex ## Images ![Doctor's Best Fully Active Vitamin B Complex Supplement for Men & Women - Super Complex with Methylated B12 & Folate, B6, Biotin, Pantothenic Acid, & More, Energy Support Caps - 30 Veggie Capsules - Image 1](https://m.media-amazon.com/images/I/61+Zpf3mO1L.jpg) ![Doctor's Best Fully Active Vitamin B Complex Supplement for Men & Women - Super Complex with Methylated B12 & Folate, B6, Biotin, Pantothenic Acid, & More, Energy Support Caps - 30 Veggie Capsules - Image 2](https://m.media-amazon.com/images/I/71-xOWP+R4L.jpg) ![Doctor's Best Fully Active Vitamin B Complex Supplement for Men & Women - Super Complex with Methylated B12 & Folate, B6, Biotin, Pantothenic Acid, & More, Energy Support Caps - 30 Veggie Capsules - Image 3](https://m.media-amazon.com/images/I/71AhFs0lQFL.jpg) ![Doctor's Best Fully Active Vitamin B Complex Supplement for Men & Women - Super Complex with Methylated B12 & Folate, B6, Biotin, Pantothenic Acid, & More, Energy Support Caps - 30 Veggie Capsules - Image 4](https://m.media-amazon.com/images/I/71V8bDaT8wL.jpg) ![Doctor's Best Fully Active Vitamin B Complex Supplement for Men & Women - Super Complex with Methylated B12 & Folate, B6, Biotin, Pantothenic Acid, & More, Energy Support Caps - 30 Veggie Capsules - Image 5](https://m.media-amazon.com/images/I/71drEo-FddL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Is this made in usa? whether any ingredients are sourced from china?** A: Personally, I find it bizarre that this question is asked so often. No matter where the product is made or source, do you actually think that the end product would not have to meet purity standards in order to be sold here in the US? I googled the Kingdomway Group for further information, and it turns out they've been in business since 1998, selling vitamin A, D, DHA, Co-q-10, etc.. And NEWSFLASH: Probably 90% of all supplement companies get their raw materials from China, just like 90% of everything we buy in the US has some components made overseas. Sheesh... **Q: Can anyone tell me how large the capsules are? I am looking for a supplement for my daughter and she has some trouble swallowing large pills.** A: Capsules have a rating system like 0,1,2 like small medium and large. This capsule is clear, unmarked and is 3/4 inch in length. It is not a creepy hard tablet that sticks to your throat. I don't think that is considered the large - more medium. It goes down well. For a child though might consider a chewable or liquid, although B's aren't that tasty to me. The important thing is to get the Quatrefolic, the Cadillac of the folates. Drs Best has great B's. **Q: Is this comparable to nutritional yeast?** A: Better than nutritional yeast, I think. Both are bioactive. Like natural yeast, this complex has the active forms of Bs, so they can be utilized by people who cannot metabolize folic acid and other non-active b vitamins. About 45% of the population have what is called an MTHFR gene mutation, for instance, that doesn't allow them to metabolize the synthetic form of folate, folic acid. As such, they lose out then on one pathway to healthy methylation - and production of neurotransmitters, hormones, immune and digestion enzymes and more. But this is a much higher dosage than you can get in nutritional yeast without eating cupsful of it. It's okay if the amounts of b vitamins, which are water-soluable, are high, as your body just burns off what you don't need. But if you are deficient in a particular b vitamin(s), your body may need these higher amounts. Nutritional yeast also needs to be supplemented with a active from of b12, such as methycobalamin, because it doesn't contain B12. Nutritional yeast would be great for someone who knows they have good b-vitamin values already and are just looking to maintain. But taking a daily active B12 supplement with the yeast would be generally be recommended. **Q: Why is Dr. Best fully active B complex so inexpensive? And what is the purpose of absorbing acid ( a synthetic vitamin c ) included in the formula?** A: Well you're only getting 30 pills. But also, this is a good brand IMO. They're not trying to gouge the customer. Not sure about your formulation question. ## Customer Reviews ### ⭐⭐⭐⭐⭐ What a Steal!...Great Product!...Contains 100% methyl-Folate/Quatrefolic/5-MthF! *by B***R on March 19, 2016* Thrilled to find methylated/co-enzyme/active B-Vitamins at such a great price. Methylated B vits. are fully active, your body does not have to 'convert' these in to a usable form - they are already fully absorbable & ready to get to work in your body - - unlike 'old-fashioned'! non-methylated B's (i.e.: B50 complexes & the like) which actually require your body to 'convert' those to a usable form, this process itself is difficult for the body/liver & more so for certain genetic 'mutants'! - Long story short - methylated/activated/co-enzyme B-Vitamins are far superior (my opinion!) & better absorbed than the kind of B-complexes you might find at your local drug-store or Gas Station .... I used to use Jarrow 'B-right' but they changed the formula to contain a mix of synthetic/fake Folic acid & 5-mthf, whereas the Doctors Best brand contains 100% Quatrefolic (5mthf) - so Doctors Best is my preferred choice now! .... I get a definite boost in energy & mental clarity .... I take these every day along side my Amino Acids - the B's ensure that the Aminos can do their job And of course a healthy daily intake of B's is essential for practically every process in the body & to help the Liver keep on humming-along! Two big thumbs up for Doctors Best fully Active B-complex! The product got here (Hawaii) very quickly - 2 days faster than anticipated arrival! Amazon outdoes itself yet again! ### ⭐⭐⭐⭐⭐ Very good w/o negative side effects *by J***N on March 26, 2024* As a plant based eater, I have taken a vegan B12 supplement for years. Recently, I ran out and was “too busy” to order more. After a couple months, I noticed having low energy especially in the afternoons and then started having heart palpitations. I went to the doctor to be safe, and confirmed that everything was good except my B12 was on the bottom end of the “normal range.” I ordered this B complex, and within less than 2 weeks of taking it daily, the palpitations were gone and energy is coming back. Lesson learned. This is a great oral supplement and seems to be very effective without any negative side effects. ### ⭐⭐⭐⭐⭐ Best B complex *by P***5 on July 22, 2023* I have tried many others and this complex is not only the most complete but it's a great value. B vitamins are so essential for good health and help with energy. I take mine mid -day with a snack to give me an energy boost. It's better than any energy drink! My hair has also grown in better with less Grey. Overall, if you are looking for a good quality B complex, I definitely recommend this! ## Frequently Bought Together - Doctors Best Fully Active B Complex, Energy & Cellular Support, Non-GMO, Gluten Free, Soy Free, Vegan 30 Veggie Caps - Doctors BEST High Absorption Magnesium Lysinate Glycinate 100% Chelated, Muscle Relaxation & Sleep Support, Non-GMO, Gluten Free, Soy Free, Vegan, 100% Chelated 240 Tablets - Doctor's Best Vitamin C with Q-C - Vitamin C 1000mg Non-GMO, Vegan, Gluten Free, Soy Free, Sourced from Scotland Veggie Caps, 120 Count --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/4236391-doctors-best-fully-active-vitamin-b-complex-supplement-for-men](https://www.desertcart.pl/products/4236391-doctors-best-fully-active-vitamin-b-complex-supplement-for-men) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-11*