Product Description
Your body can't store B vitamins. Every hard run, long ride, or punishing interval session depletes them, and because they're water-soluble, what your body doesn't use gets flushed out daily. Most athletes assume their diet covers the gap. Often, it doesn't. And when your B vitamin levels slip, the first things to go are energy, focus, and the efficiency of the metabolic engine that turns food into fuel.
Thorne Basic B Complex is the daily foundation that keeps all of that running smoothly. This daily formula delivers all eight in their most absorbable active forms, so your body can convert food to fuel efficiently every single day.
All Eight B Vitamins in Active, Tissue-Ready Forms – Most B-complex supplements use cheap, inactive vitamin forms that your body has to convert before they're useful — a step that's inefficient for everyone and genuinely problematic for athletes with certain genetic variations. Basic B Complex delivers every B vitamin in its active form, including methylcobalamin B12 and methylated folate (5-MTHF), so your body can put them to work immediately.
400mcg of Methylcobalamin B12 Per Capsule – B12 supports red blood cell formation, oxygen transport, and nerve signaling, three things that matter enormously when you're training. Thorne's Basic B Complex delivers a meaningful clinical dose in the most bioavailable form available, which is especially important for plant-based athletes whose diets are naturally low in B12.
Choline for Focus and Neurological Function – Alongside the eight core B vitamins, Basic B Complex includes choline, a nutrient that supports the production of acetylcholine, the neurotransmitter responsible for muscle activation and sharp cognitive function. When training volume is high and mental bandwidth is stretched, this matters.
B vitamins work together at every stage of your body's energy production process — converting carbohydrates, fats, and proteins into fuel, supporting red blood cell formation, and keeping your nervous system firing cleanly. Because they don't accumulate in the body, daily replenishment isn't optional. It's maintenance.
How to Use Thorne Basic B Complex
Daily Foundation: Take 1 capsule with breakfast to prime your energy systems for the day ahead. Morning dosing with food maximizes absorption and minimizes any chance of digestive sensitivity.
Higher Training Loads: During heavy training blocks, take up to 3 capsules daily, split across meals, as recommended by your healthcare practitioner.
Pro Tip: Avoid late-day dosing — B vitamins are energizing by nature and can disrupt sleep in sensitive athletes when taken in the evening.
- Gluten free
Supplement Facts
60 Servings
Serving Size: One Capsule
Serving Per Container: 60
| Amount Per Serving | ||
|---|---|---|
| % Daily Value* | ||
| Thiamin (as Thiamin HCl) 110mg | ** | |
| Riboflavin (as Riboflavin 5'-Phosphate Sodium) 10mg | ** | |
| Niacin (130 mg as Niacinamide and 10 mg as Niacin) 140mg | ** | |
| Vitamin B6 (as Pyridoxal 5'-Phosphate) 10mg | ** | |
| Folate (400 mcg as L-5-Methyltetrahydrofolate from L-5-Methyltetrahydrofolic Acid, Glucosamine Salt) 667mcg DFE | ** | |
| Vitamin B12 (as Methylcobalamin) 400mcg | ** | |
| Biotin 400mcg | ** | |
| Pantothenic Acid (as Calcium Pantothenate) 110mg | ** | |
| Choline (as Choline Citrate) 28mg | ** | |
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
** Daily Value (DV) not established
Always Happy Promise: Don't like a product? Tell us within 30 days of receipt and we'll make it right and make you happy. Here at The Feed, we want you to love your experience and the sports nutrition products you purchase. If, for any reason, you are not satisfied with your nutrition specific purchase, tell us.
We do not accept returns on food items that have been opened, but we will issue a store credit if you are unsatisfied. In the event of a return, you must first contact us before sending back a return shipment.
Consumable products over $40 receive a 50% store credit. This includes specialty nutrition products such as ketones or supplements/vitamins.
Thorne Basic B Complex FAQ's
Everything you need to know before getting started.
Take 1 capsule with breakfast. Morning dosing with food supports energy metabolism throughout the day and maximizes absorption. Avoid evening dosing — the energizing effect of B vitamins can interfere with sleep in some athletes.
Both formulas use active, tissue-ready B vitamins, but they're built for different purposes. Basic B Complex is the everyday foundational formula, featuring a higher dose of B12 (400mcg vs. 100mcg) and biotin (400mcg) for daily energy metabolism and nervous system support. Stress B Complex is designed for peak training loads, with an elevated B5 dose (250mg) specifically targeting adrenal function and cortisol regulation. For most athletes, Basic B is the daily driver; Stress B is the tool for hard training blocks.
Most budget B-complexes use cyanocobalamin, a synthetic form of B12 your body has to convert before it can use it. Thorne uses methylcobalamin — the active, ready-to-use form that requires no conversion and is significantly better absorbed, especially for athletes with higher demand.
5-MTHF is the active form of folate your body can use directly. A significant portion of people carry the MTHFR genetic variant, which limits their ability to convert standard folic acid. By using 5-MTHF, Thorne ensures everyone gets the full benefit regardless of genetics — including the folate needed for red blood cell formation and oxygen transport.
Yes, though check your multivitamin for B vitamin overlap first. If it already includes a full B-complex, you may want to take just 1 capsule of Basic B Complex daily rather than 2–3, or consult a practitioner to dial in your personal stack.