BIOACTIVE B COMPLEX

Methylated B's,

done right.

A full B-complex built around the active forms — methylfolate, methylcobalamin, P-5-P, and benfotiamine. The cofactors your cells can actually use, paired to support energy, methylation, and nervous system function.

Shop Optimal B Complex View Formula →

PROFESSIONAL GRADE · 60 CAPSULES · METHYLFOLATE · METHYLCOBALAMIN · P-5-P

Optimal B Complex bottle
BIOAVAILABLE
8 activated B vitamins

Active forms, not precursors.

Benfotiamine, riboflavin-5-phosphate, P-5-P, and 5-MTHF skip the conversion steps your genetics may stall at. This is a B-complex that works whether or not MTHFR is on your side.

METHYLATION
1000 mcg methylcobalamin

The one-carbon pathway, fed.

Methylcobalamin and methylfolate team up to drive the methylation cycle — the chemistry behind DNA repair, neurotransmitter synthesis, and homocysteine balance.

DAILY DOSE
1 capsule with food

Simple, once-daily support.

One capsule covers the full B-complex backbone. Pair with your morning meal for steady energy, stable mood, and methylation support from the start of the day.

MAY BENEFIT

Bioactive B's
for real biology.

01
Cellular energy
Active B vitamins feed mitochondrial ATP production and carbohydrate metabolism.
02
Methylation support
5-MTHF and methylcobalamin supply the methyl donors homocysteine clearance depends on.
03
Nervous system function
P-5-P and B12 are cofactors in neurotransmitter synthesis and nerve myelination.
04
Immune resilience
B6, B12, and folate support the T-cell and antibody responses that keep immunity adaptive.
05
Red blood cell formation
B12 and folate are core cofactors in erythropoiesis and iron utilization.
06
Digestive metabolism
Benfotiamine and pantothenic acid support glucose handling and coenzyme A production.

Formula

Eight B vitamins in the forms your cells already recognize.

KEY INGREDIENTS

Thiamin
As Benfotiamine
Riboflavin
As Riboflavin 5'-Phosphate
Niacin
As Niacinamide And Niacin
Vitamin B6
As Pyridoxal 5'-Phosphate
Folate
As Metafolin Calcium L-5-Methyltetrahydrofolate
Vitamin B12
As Methylcobalamin
Biotin
D-Biotin
Pantothenic Acid
As Calcium D-Pantothenate

OTHER INGREDIENTS

Hydroxypropyl Methylcellulose, Water, Microcrystalline Cellulose, Silicon Dioxide, Ascorbyl Palmitate

DIRECTIONS

Adults: Take one capsule daily with food or as directed by a healthcare practitioner.

MAY BENEFIT:
Energy
Immune System
Methylation (Cell Function)

Questions

Frequently asked.

What makes this different from a standard B-complex?
Most drugstore B-complexes use folic acid and cyanocobalamin — synthetic precursors that require enzymatic conversion before cells can use them. Optimal B Complex delivers the activated end-forms directly, which matters for anyone with MTHFR, MTRR, or general methylation variants.
Who benefits most from activated B vitamins?
People with known MTHFR variants, fatigue that doesn't respond to standard multivitamins, neurological or mood complaints, elevated homocysteine, or GI issues that impair B12 absorption. Practitioners often reach for bioactive B's first in methylation-focused protocols.
Can I take it with other methylation products?
Yes. Optimal B Complex pairs well with targeted methylation support — some patients prefer the broader B-complex backbone here and add concentrated methylfolate or SAM-e on top as needed.
When should I take it?
With breakfast. B vitamins can feel subtly energizing, so morning dosing supports daytime energy without interfering with sleep.
Will it turn my urine bright yellow?
Possibly — that's riboflavin doing its job. Bright yellow urine is harmless and simply reflects that your body took what it needed and excreted the rest.
Is it safe during pregnancy?
Consult your healthcare practitioner before use if you are pregnant, lactating, or taking medications. Methylated B vitamins are often recommended in pregnancy, but dosing should be individualized with your provider.

The Science

Learn the why.

immune

Methylation and the immune system: how one cycle shapes inflammation

The methylation cycle is not just a mood and detox system — it quietly regulates how your immune cells turn on, turn off, and resolve inflammation. Here's the connection.

Mar 23, 2026 →

nutrition

Homocysteine: what drives it up, what brings it down

Elevated homocysteine is one of the most actionable labs in functional medicine. Here's what pushes it up, what pulls it down, and how to interpret your number alongside genetics and symptoms.

Feb 26, 2026 →

nutrition

B6 forms explained: why P5P beats pyridoxine HCl

Not all vitamin B6 is the same. Here's the difference between pyridoxine HCl and P5P, why the bioactive form matters — especially for people with impaired conversion — and how to read the label.

Apr 14, 2026 →