PlainVitamins

Just Once

by Rainbow Light · tablet or pill · 60 tablets

  • Off the market since November 2014 (NIH)
  • UPC 0 21888 10472 7
  • DSLD label 42699
  • Serving 1 tablet
  • 60 servings

Just Once by Rainbow Light lists 44 ingredients, 39 with an amount per serving of 1 tablet, such as 5,000 IU of vitamin A, 240 mg of vitamin C, 400 IU (10 mcg) of vitamin D and 30 IU of vitamin E; 5 sit inside a blend without their own amounts. Its current label entered the NIH Dietary Supplement Label Database on February 25, 2015.

What is in Just Once?

Each row as the label prints it, per serving of 1 tablet. 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).

Just Once: Supplement Facts rows against the market (DSLD label 42699, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Aas Beta-CaroteneVitamin A (Form: as Beta-Carotene)5,000 IU100%Vitamin A in Just Once against 5,772 products5,000 IU per serving; the middle half of products list 2,000 IU to 5,000 IU, the median 4,000 IU.5,000 IU

Higher than 55% of 5,772 products listing vitamin A (median 4,000 IU).

Vitamin Cas Ascorbic Acid, Magnesium Ascorbate240 mg400%Vitamin C in Just Once against 18,583 products240 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg240 mg

Higher than 68% of 18,583 products listing vitamin C (median 100 mg).

Vitamin Das Ergocalciferol, Vitamin D2Vitamin D (Form: as D2 (Alt. Name: Ergocalciferol))400 IU (10 mcg)100%Vitamin D in Just Once against 14,175 products10 mcg per serving; the middle half of products list 10 mcg to 25 mcg, the median 15 mcg.DV 20 mcgUL 100 mcg10 mcg

57% of 14,175 products listing vitamin D give more (median 15 mcg).

Vitamin Eas D-Alpha-Tocopheryl Succinate30 IU100%Vitamin E in Just Once against 6,459 products30 IU per serving; the middle half of products list 15 IU to 100 IU, the median 30 IU.30 IU

44% of 6,459 products listing vitamin E give more (median 30 IU).

Vitamin Kas Phytonadione30 mcg38%Vitamin K in Just Once against 4,607 products30 mcg per serving; the middle half of products list 35 mcg to 100 mcg, the median 80 mcg.DV 120 mcg30 mcg

76% of 4,607 products listing vitamin K give more (median 80 mcg).

Vitamin B1as Thiamine MononitrateVitamin B-1 (Form: as Thiamin Mononitrate)6 mg400%Thiamin in Just Once against 9,830 products6 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg6 mg

Higher than 55% of 9,830 products listing thiamin (median 5 mg).

Riboflavinas Vitamin B26 mg353%Riboflavin in Just Once against 9,824 products6 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg6 mg

Higher than 57% of 9,824 products listing riboflavin (median 4 mg).

Niacinas NiacinamideNiacin (Form: as Niacinamide)30 mg150%Niacin in Just Once against 12,413 products30 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg30 mg

Higher than 63% of 12,413 products listing niacin (median 20 mg).

Vitamin B6as Pyridoxine6 mg300%Vitamin B6 in Just Once against 15,277 products6 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg6 mg

49% of 15,277 products listing vitamin B6 give more (median 6 mg).

Folic Acid400 mcg100%Folate in Just Once against 7,022 products400 mcg per serving; the middle half of products list 200 mcg to 400 mcg, the median 400 mcg.400 mcg

24% of 7,022 products listing folate give more (median 400 mcg).

Vitamin B12as CyanocobalaminVitamin B-12 (Form: as Cyanocobalamin)25 mcg417%Vitamin B12 in Just Once against 14,425 products25 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg25 mcg

54% of 14,425 products listing vitamin B12 give more (median 36 mcg).

Biotin300 mcg100%Biotin in Just Once against 9,447 products300 mcg per serving; the middle half of products list 50 mcg to 300 mcg, the median 200 mcg.DV 30 mcg300 mcg

Higher than 53% of 9,447 products listing biotin (median 200 mcg).

Vitamin B5as Calcium PantothenateVitamin B-5 (Form: as Calcium Pantothenate)30 mg300%Pantothenic Acid (Vitamin B5) in Just Once against 10,060 products30 mg per serving; the middle half of products list 6 mg to 50 mg, the median 12 mg.DV 5 mg30 mg

Higher than 66% of 10,060 products listing pantothenic acid (vitamin B5) (median 12 mg).

Calciumas Calcium Amino Acid ChelateCalcium (Form: as Calcium Amino Acid Chelate)30 mg3%Calcium in Just Once against 17,831 products30 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg30 mg

84% of 17,831 products listing calcium give more (median 115 mg).

Ironas Iron GlycinateIron (Form: as Iron Glycinate)2 mg11%Iron in Just Once against 6,910 products2 mg per serving; the middle half of products list 1.2 mg to 18 mg, the median 5 mg.DV 18 mgUL 45 mg2 mg

66% of 6,910 products listing iron give more (median 5 mg).

Iodineas KelpIodine (Form: from Kelp)100 mcg67%Iodine in Just Once against 6,382 products100 mcg per serving; the middle half of products list 75 mcg to 150 mcg, the median 150 mcg.DV 150 mcgUL 1,100 mcg100 mcg

59% of 6,382 products listing iodine give more (median 150 mcg).

Magnesiumas Magnesium Ascorbate, Magnesium GlycinateMagnesium (Form: as {Magnesium} Glycinate, {Magnesium} Ascorbate)30 mg8%Magnesium in Just Once against 14,003 products30 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg30 mg

75% of 14,003 products listing magnesium give more (median 86 mg).

Zincas Zinc MonomethionineZinc (Form: as {Zinc} Citrate, {Zinc} Monomethionine)5 mg33%Zinc in Just Once against 13,186 products5 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg5 mg

72% of 13,186 products listing zinc give more (median 11 mg).

Seleniumas SelenomethionineSelenium (Form: as Selenomethionine)25 mcg36%Selenium in Just Once against 7,658 products25 mcg per serving; the middle half of products list 27 mcg to 100 mcg, the median 55 mcg.DV 55 mcgUL 400 mcg25 mcg

75% of 7,658 products listing selenium give more (median 55 mcg).

Copperas {Copper} GlycinateCopper (Form: as {Copper} Glycinate)500 mcg25%Copper in Just Once against 6,468 products0.5 mg per serving; the middle half of products list 0.5 mg to 2 mg, the median 1 mg.DV 0.9 mgUL 10 mg0.5 mg

68% of 6,468 products listing copper give more (median 1 mg).

Manganeseas {Manganese} GlycinateManganese (Form: as {Manganese} Glycinate)2 mg100%Manganese in Just Once against 7,016 products2 mg per serving; the middle half of products list 1 mg to 3.92 mg, the median 2 mg.DV 2.3 mgUL 11 mg2 mg

38% of 7,016 products listing manganese give more (median 2 mg).

Chromiumas Chromium AAC NicotinateChromium (Form: as Chromium AAC Nicotinate)50 mcg42%Chromium in Just Once against 7,825 products50 mcg per serving; the middle half of products list 45 mcg to 200 mcg, the median 100 mcg.DV 35 mcg50 mcg

67% of 7,825 products listing chromium give more (median 100 mcg).

Molybdenumas Molybdenum AspartateMolybdenum (Form: as {Molybdenum} Aspartate)10 mcg13%Molybdenum in Just Once against 4,390 products10 mcg per serving; the middle half of products list 25 mcg to 75 mcg, the median 50 mcg.DV 45 mcgUL 2,000 mcg10 mcg

91% of 4,390 products listing molybdenum give more (median 50 mcg).

Potassiumas Potassium CitratePotassium (Form: as {Potassium} Citrate)20 mg1%Potassium in Just Once against 11,614 products20 mg per serving; the middle half of products list 50 mg to 190 mg, the median 99 mg.DV 4,700 mg20 mg

89% of 11,614 products listing potassium give more (median 99 mg).

Boron GlycinateBoron (Form: as Boron Glycinate)50 mcg

The label names the compound (Boron Glycinate); its amount is likely the compound's weight, not the boron it holds, so it is not placed among other products.

Vanadiumas Vanadyl SulfateVanadium (Form: as Vanadyl Sulfate)8 mcgVanadium in Just Once against 1,744 products8 mcg per serving; the middle half of products list 10 mcg to 100 mcg, the median 25 mcg.UL 1,800 mcg8 mcg

92% of 1,744 products listing vanadium give more (median 25 mcg).

Lemon Bioflavonoid Complex60 mgFlavonoid in Just Once against 2,343 products60 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.60 mg

Higher than 55% of 2,343 products listing flavonoid (median 50 mg).

Kelp powderKelp powder Note: Atlantic20 mgKelp in Just Once against 333 products20 mg per serving; the middle half of products list 20 mg to 100 mg, the median 50 mg.20 mg

73% of 333 products listing kelp give more (median 50 mg).

Cholineas Choline BitartrateCholine (Form: as {Choline} Bitartrate)15 mg3%*Choline in Just Once against 4,738 products15 mg per serving; the middle half of products list 18 mg to 100 mg, the median 40 mg.DV 550 mgUL 3,500 mg15 mg

76% of 4,738 products listing choline give more (median 40 mg).

Inositol15 mgInositol in Just Once against 4,042 products15 mg per serving; the middle half of products list 10 mg to 80 mg, the median 30 mg.15 mg

69% of 4,042 products listing inositol give more (median 30 mg).

Rutin15 mgRutin in Just Once against 1,232 products15 mg per serving; the middle half of products list 10 mg to 50 mg, the median 25 mg.15 mg

67% of 1,232 products listing rutin give more (median 25 mg).

Hesperidin10 mgHesperidin in Just Once against 552 products10 mg per serving; the middle half of products list 10 mg to 50 mg, the median 20 mg.10 mg

64% of 552 products listing hesperidin give more (median 20 mg).

Paba5 mgPABA in Just Once against 1,610 products5 mg per serving; the middle half of products list 10 mg to 50 mg, the median 25 mg.5 mg

85% of 1,610 products listing PABA give more (median 25 mg).

Food Enzyme Complex37 mg
Protease1,188 HUT
Amylase93 DU
Lipase1 LU
Cellulase1 CU
Bromelain12,000 PU
Apple Pectin20 mgPectin in Just Once against 526 products20 mg per serving; the middle half of products list 20 mg to 250 mg, the median 86 mg.20 mg

73% of 526 products listing pectin give more (median 86 mg).

Superfood Energy ComplexSuperfood Energy Complex Note: equivalent to 605 mg of food and herbal powder155 mg
organic Spirulinano amount given
Chlorellano amount given
Eleuthero [root] 4:1 extractno amount given
Stinging Nettle [tops] 4:1 extractno amount given
Ginkgo [leaf] 50:1 Extractno amount given

* % Daily Value computed from the printed amount and the FDA Daily Value (21 CFR 101.9); the label prints none for that row.

Source: NIH ODS Dietary Supplement Label Database, label 42699 (entered February 25, 2015), 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:

  • 91% of the 4,390 products that print an amount of molybdenum list more than its 10 mcg of molybdenum (median 50 mcg).
  • 89% of the 11,614 products that print an amount of potassium list more than its 20 mg of potassium (median 99 mg).
  • 92% of the 1,744 products that print an amount of vanadium list more than its 8 mcg of vanadium (median 25 mcg).
  • 85% of the 1,610 products that print an amount of PABA list more than its 5 mg of paba (filed by NIH under PABA) (median 25 mg).

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?

The products whose ingredient lists overlap most with Just Once'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 USAGE: One tablet per day, with or between meals.
Warnings
Warning: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of reach of children. in case of accidental overdose, call a doctor or poison control center immediately.
CAUTION: Consult a health care professional prior to use if taking any medication.
Allergens and what it does not contain
VeganGuard(R) screened for vegans to be free of animal products.
GUARANTEE: 100% Natural - Free of artificial colors, flavors, sweeteners, preservatives and other objectionable additives often found in vitamin products. Contains no sugar, lactose/dairy, wheat, gluten or yeast.

Source: label statements in DSLD label 42699.

What else is on the label?

Other ingredients: Cellulose, Stearic Acid, Modified Cellulose, Silica, Coating.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Eco-Guard(TM) Bottle 100% Recycled 100% Recyclable; JUST1ONCE(R); VeganGuard(R).

How many labels does Just Once have?

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

  1. Label 42699 (current) Entered February 25, 2015 · off the market November 10, 2014 · 60 tablets · UPC 0 21888 10472 7
  2. Label 42698 Entered February 25, 2015 · off the market March 28, 2023 · 60 tablets · UPC 0 21888 10472 7
  3. Label 42697 Entered February 25, 2015 · off the market March 28, 2023 · 30 tablets · UPC 0 21888 10471 0
  4. Label 42696 Entered February 25, 2015 · off the market November 10, 2014 · 30 tablets · UPC 0 21888 10471 0
  5. Label 42688 Entered February 25, 2015 · off the market March 28, 2023 · 120 tablets · UPC 0 21888 10474 1
  6. Label 42684 Entered February 25, 2015 · off the market November 10, 2014 · 120 tablets · UPC 0 21888 10474 1
  7. Label 26379 Entered November 25, 2013 · off the market March 28, 2023 · N/A

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

Who makes it?

The label names RAINBOW LIGHT NUTRITIONAL SYSTEMS (manufacturer, distributor), Santa Cruz, CA. All Rainbow Light products.

Where next?