PlainVitamins

Theanine Serene

by Source Naturals · tablet or pill · 30 tablets

  • On the market (NIH)
  • UPC 0 21078 01774 5
  • DSLD label 77865
  • Serving 2 tablets
  • 15 servings

Theanine Serene by Source Naturals lists 5 ingredients, 5 with an amount per serving of 2 tablets, such as 300 mg of magnesium, 500 mg of GABA, 450 mg of taurine and 200 mg of L-theanine, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on August 22, 2017.

What is in Theanine Serene?

Each row as the label prints it, per serving of 2 tablets. 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).

Theanine Serene: Supplement Facts rows against the market (DSLD label 77865, January 2026 release)
IngredientAmount% DVAmong products listing it
Calories5 Calories
Total Carbohydrates1 g1%Carbohydrate in Theanine Serene against 21,979 products1 g per serving; the middle half of products list 1 g to 6 g, the median 3 g.1 g

74% of 21,979 products listing carbohydrate give more (median 3 g).

Magnesiumas Magnesium ChelateMagnesium (Form: as Magnesium Chelate)300 mg75%Magnesium in Theanine Serene against 14,003 products300 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg300 mg

Higher than 87% of 14,003 products listing magnesium (median 86 mg).

GABA500 mgGABA in Theanine Serene against 744 products500 mg per serving; the middle half of products list 80 mg to 400 mg, the median 100 mg.500 mg

Higher than 77% of 744 products listing GABA (median 100 mg).

Taurine450 mgTaurine in Theanine Serene against 2,337 products450 mg per serving; the middle half of products list 110 mg to 1,000 mg, the median 500 mg.450 mg

57% of 2,337 products listing taurine give more (median 500 mg).

L-Theanine200 mgTheanine in Theanine Serene against 1,602 products200 mg per serving; the middle half of products list 90 mg to 200 mg, the median 100 mg.200 mg

Higher than 61% of 1,602 products listing theanine (median 100 mg).

Holy Basil Leaf Extract100 mgHoly Basil in Theanine Serene against 387 products100 mg per serving; the middle half of products list 50 mg to 400 mg, the median 129 mg.100 mg

52% of 387 products listing holy basil give more (median 129 mg).

Source: NIH ODS Dietary Supplement Label Database, label 77865 (entered August 22, 2017), 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?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

The NIH database records one serving 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?

2 products list the very same ingredients; the nearest amounts come first.

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: 2 tablets daily.
Warnings
Warning: If you are pregnant, may become pregnant, or breastfeeding, or taking any medication including antidepressant drugs such as MAOIs, SSRIs, or other neuropsychiatric drugs or supplements such as St. John’s wort, consult your health care professional before using this product.
Excessive consumption may impair ability to drive or operate heavy equipment. Not recommended for consumption with alcoholic beverages.
Do not use if either tamper-evident seal is broken or missing.
Keep out of the reach of children.
Allergens and what it does not contain
Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.

Source: label statements in DSLD label 77865.

What else is on the label?

Other ingredients: Sorbitol, Stearic Acid, modified Cellulose Gum, Silica.

How many labels does Theanine Serene have?

4 labels are on file under this name since April 25, 2017: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 296298 Entered August 23, 2023 · off the market July 6, 2022 · 30 tablets · UPC 0 21078 01774 5
  2. Label 77865 (current) Entered August 22, 2017 · on the market · 30 tablets · UPC 0 21078 01774 5
  3. Label 72573 Entered April 25, 2017 · on the market · 120 tablets · UPC 0 21078 01776 9
  4. Label 72571 Entered April 25, 2017 · off the market December 22, 2021 · 60 tablets · UPC 0 21078 01775 2

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

Who makes it?

The label names Source Naturals, Inc. (distributor), Santa Cruz, CA. All Source Naturals products.

Where next?