PlainVitamins

Sinus & Seasonal

by LES Labs · capsule · 60 capsules

  • On the market (NIH)
  • UPC 0 91037 75859 0
  • DSLD label 276529
  • Serving 1 capsule
  • 60 servings

Sinus & Seasonal by LES Labs lists 5 ingredients, 5 with an amount per serving of 1 capsule, such as 200 mg of quercetin, 150 mg of stinging nettle root extract, 50 mg of bromelain and 50 mg of butterbur root extract. Its current label entered the NIH Dietary Supplement Label Database on October 24, 2022.

What is in Sinus & Seasonal?

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).

Sinus & Seasonal: Supplement Facts rows against the market (DSLD label 276529, January 2026 release)
IngredientAmount% DVAmong products listing it
Quercetinas Quercetin Dihydrate200 mgQuercetin in Sinus & Seasonal against 1,548 products200 mg per serving; the middle half of products list 26.5 mg to 250 mg, the median 100 mg.200 mg

Higher than 66% of 1,548 products listing quercetin (median 100 mg). Per day at the most servings: 600 mg.

Stinging Nettle root extract150 mgStinging Nettle in Sinus & Seasonal against 710 products150 mg per serving; the middle half of products list 50 mg to 300 mg, the median 120 mg.150 mg

Higher than 54% of 710 products listing stinging nettle (median 120 mg). Per day at the most servings: 450 mg.

Bromelain50 mgBromelain in Sinus & Seasonal against 1,337 products50 mg per serving; the middle half of products list 25 mg to 200 mg, the median 50 mg.50 mg

50% of 1,337 products listing bromelain give more (median 50 mg). Per day at the most servings: 150 mg.

Butterbur Root Extractas Petasin15% petasins50 mgButterbur in Sinus & Seasonal against 71 products50 mg per serving; the middle half of products list 50 mg to 150 mg, the median 75 mg.50 mg

54% of 71 products listing butterbur give more (median 75 mg). Per day at the most servings: 150 mg.

Bioperine Black Pepper Fruit Extract2 mgBlack Pepper in Sinus & Seasonal against 2,363 products2 mg per serving; the middle half of products list 5 mg to 10 mg, the median 5 mg.2 mg

93% of 2,363 products listing black pepper give more (median 5 mg). Per day at the most servings: 6 mg.

Source: NIH ODS Dietary Supplement Label Database, label 276529 (entered October 24, 2022), version 9.4.0. See the label on DSLD or its label image (PDF). 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:

  • 93% of the 2,363 products that print an amount of black pepper list more than its 2 mg of bioperine black pepper fruit extract (filed by NIH under black pepper) (median 5 mg).

The NIH database records 1 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 Sinus & Seasonal'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
Suggested Use: Take one (1) capsule one to three times daily or as directed by a physician.
Warnings
Caution: Keep out of reach of children.
Pregnant or lactating women and those undergoing treatment for a medical condition should consult a physician before taking this supplement.
Do not use if outer seal is missing or damaged.
Allergens and what it does not contain
Made with non-GMO ingredients
Storage
Store in a dry, cool place.

Source: label statements in DSLD label 276529.

What else is on the label?

Other ingredients: Hypromellose, Rice Bran, Powder.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Manufactured in the USA cGMP Certified Manufacturing.

How many labels does Sinus & Seasonal have?

One label is on file, entered on October 24, 2022.

  1. Label 276529 (current) Entered October 24, 2022 · on the market · 60 capsules · UPC 0 91037 75859 0

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

Who makes it?

The label names LES Labs, Inc. (distributor), Los Angeles, CA. All LES Labs products.

Where next?