Seredyn

by BioNeurix · capsule · 60 capsules

  • On the market (NIH)
  • UPC 7 36211 31401 7
  • DSLD label 249127
  • Serving 1 to 2 capsules; amounts per 1 capsule
  • 60 servings

Seredyn by BioNeurix lists 6 ingredients, 2 with an amount per serving of 1 capsule, such as 200 mg of niacin and 14 mg of magnesium; 4 sit inside a blend without their own amounts. Its current label entered the NIH Dietary Supplement Label Database on June 23, 2021.

What is in Seredyn?

Each row as the label prints it, per serving of 1 capsule. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Seredyn: Supplement Facts rows against the market (DSLD label 249127, January 2026 release)
IngredientAmount% DVAmong products listing it
Niacinas NiacinamideNiacin (Form: as Niacinamide)200 mg1,000%Niacin in Seredyn against 12,413 products200 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg200 mg

Higher than 95% of 12,413 products listing niacin (median 20 mg). Per day at the most servings: 600 mg. 17.1 times the adult UL a day.

Magnesiumas Magnesium Taurinate14 mg4%Magnesium in Seredyn against 14,003 products14 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg14 mg

89% of 14,003 products listing magnesium give more (median 86 mg). Per day at the most servings: 42 mg.

Seredyn Proprietary Blend480 mg
Passion Flower extractin the blend, no amount given
Valerian extractin the blend, no amount given
Suntheaninein the blend, no amount given
Taurineas Magnesium Taurinatein the blend, no amount given

Source: NIH ODS Dietary Supplement Label Database, label 249127 (entered June 23, 2021), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • At 3 servings a day, the most its directions give, the label lists 600 mg of niacin, 17.1 times the adult Tolerable Upper Intake Level.

The NIH database records 2 to 3 servings a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

The products whose ingredient lists overlap most with Seredyn's, rare ingredients counting for more.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
Directions: Seredyn can be taken every day or occasionally "as needed". To use regularly for relief of worry and stress, take one or two capsules 2-3x daily. To use occasionally to calm down fast in stressful situations, take 1-3 capsules "as needed".
Warnings
Precautions & drug interactions: May potentiate sedatives and alcohol. May cause drowsiness. Use caution when driving until you are familiar with the effects of Seredyn. Consult a healthcare professional before taking Seredyn if you have a serious medical condition. Discontinue use if unusual symptoms occur.
Consult a healthcare professional before taking Seredyn if you are pregnant or nursing.
Not recommended for young children.
Storage
Store in a cool, dark place.

Source: label statements in DSLD label 249127.

What else is on the label?

Other ingredients: Magnesium Stearate, Gelatin Capsule, Rice Flour powder, Silicon Dioxide.

How many labels does Seredyn have?

2 labels are on file under this name since October 25, 2013: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 249127 (current) Entered June 23, 2021 · on the market · 60 capsules · UPC 7 36211 31401 7
  2. Label 23267 Entered October 25, 2013 · off the market April 5, 2021 · 60 easy-to-swallow capsules · UPC 7 36211 31401 7

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names BioNeurix Corp. (manufacturer), Los Angeles, CA. All BioNeurix products.

Where next?