First Day Adults Protein + Fiber + Collagen 8-in-1 Complex powder in a resealable stand-up pouch, shown with three single-serve packets, a glass of lemonade with lemon slices, and peach and yellow fruit slices on a white background.
A person pours a light yellow drink from a First Day Verisol pouch into a glass with lemon slices. A large bag of First Day Adults protein, fiber, and collagen is visible on the counter behind it, with a text overlay at the top describing the product.
Promotional graphic for First Day Adults Ready-to-Pour Powder Protein, Fiber & Collagen Complex in Peach Mango and Lemonade flavors. The image features two stand-up pouches of the product, with text detailing nutritional benefits (15g protein, 8g fiber, 2.
A promotional graphic with a large blue panel containing survey text about consumer preferences for liquid packets versus powders, shakers, and tubs, alongside a faded photo of a child pouring liquid from a carton into a glass at a kitchen counter.
An infographic-style product graphic on a light blue background with the headline '90%+ of Adults Don't Get Enough Fiber.' It shows three illustrated callouts: '15g Protein,' '8g Fiber,' and 'Light' with a drink and lemon slice, explaining a fiber-and-protein supplement concept.
An infographic-style product graphic with large blue text reading '3X More Nutrients Than Protein Alone' on a pale blue background, plus three benefit callouts: Build Muscle, Improve Skin, Hair & Nails, and Balance Metabolism.
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An informational graphic for a dental composite material called VERISOL, showing three layers: Fiber, Protein, and Collagen. The graphic features a clean white and light blue design with text descriptions of each layer and their benefits, including 'Gentle, 5-source blend supports digestion' for the fiber, 'Grass-fed whey, cultured protein + collagen provide a complete amino acid profile' for the protein, and '2.
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A product comparison graphic for adult protein and fiber + collagen powder, showing two supplement facts panels: Fresh Lemonade and Peach Mango. The left panel is labeled Fresh Lemonade and the right panel Peach Mango, both with blue headers and white supplement fact sections.

Adult Protein + Fiber + Collagen (15 Ready-to-Pour Packets) - DRAFT Protein + Fiber + Collagen Ready-To-Pour Mix. Muscle, Gut And Skin In One Packet.

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Ingredients

Bio-Protein Matrix: bioactive collagen peptides (incl. VERISOL®), cell-based cultured protein (S. cerevisiae), whey protein isolate.

Bio-Adaptive Fiber Blend: organic Jerusalem artichoke (Helianthus tuberosus) (tuber) extract, digestion-resistant dextrin, tapioca fiber, partially hydrolyzed guar gum, acacia fiber.

Sweetened with: stevia (Reb M). No added sugar.

Contains: milk (whey). Free from the other 8 major allergens. Gluten-free. Non-GMO.

Other Ingredients: Water, Citric Acid, Natural Flavors. Less than 2% of: Reb M, Beta-Carotene (For Color), Rowanberry Fruit Extract, Mushroom Extract.
Supplement Facts
Supplement Facts
Subscription Details

Receive a fresh pouch of 15 ready-to-pour packets every 30 days.

Plus, you'll receive these benefits:

  • Savings every single month.
  • Free shipping on your first order.
  • Easy management: skip or pause whenever you need.
  • VIP access to sales, gifts, early access & more.
  • Cancel anytime.
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93% Of adults Don't Get Enough Nutrients. So We Invented A New Formula That Addresses Their Biggest Gaps.

We match every nutrient to your child's exact age, using the right forms and doses through our exclusive Bio-Matched™ Formula.

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3 Proteins, 5 Fibers And VERISOL® Collagen In 1 Ready-To-Pour Packet Dosed For Adults

First Day starts with what adults actually fall short on. Then we match every ingredient to the right form and precise dose for an adult body. Nothing extra. Nothing missing.

Clear Protein

Clear Protein

Whey protein isolate for a fast leucine spike that switches on muscle protein synthesis. Dosed small, for a light dairy footprint.

Cell-Based Cultured Protein

Cell-Based Cultured Protein

Our fermentation-derived protein. All 9 essential amino acids, PDCAAS 1.0. Paired with whey for a complete, full-spectrum blend.

Collagen + VERISOL®

Collagen + VERISOL®

Bioactive collagen peptides support skin, joints, nails and connective tissue. 2.5g VERISOL® signals skin cells to build more collagen and elastin.

Partially Hydrolyzed Guar Gum

Partially Hydrolyzed Guar Gum

Slows stomach emptying and normalizes transit in both directions: firms loose, softens hard. Part of our gentle, low-FODMAP base.

Acacia Fiber

Acacia Fiber

A gentle, low-FODMAP fiber that feeds beneficial Bifidobacteria and Lactobacilli and raises short-chain fatty acids.

Tapioca Fiber

Tapioca Fiber

The third piece of our gentle base. Supports transit and regularity and helps buffer the more fermentable fibers.

Organic Jerusalem Artichoke

Organic Jerusalem Artichoke

A natural source of inulin. Its fermentation byproducts signal the gut to release its own GLP-1 and PYY.

Digestion-Resistant Dextrin

Digestion-Resistant Dextrin

Blunts the post-meal glucose rise by about 18% and supports satiety and regularity.

  • No Added Sugar
  • Sweetened With Stevia
  • Gluten Free
  • Non GMO
  • Low-FODMAP Fiber Base
  • Dissolves Instantly
  • No Scoop, No Blender
  • Clinical-Dose VERISOL®

The "No Junk" Standard

First Day Builds Every Formula To Rigorous Quality Criteria

Formulated with guidance from our medical advisory board, including Dr. Lei Chen (Yale) and Dr. Ed Giovannucci (Harvard), and tested to meet Clean Label Project standards.

Fiber

Soluble, prebiotic, insoluble and metabolic fibers do four different jobs.

Other Brands

One fiber, one job

First Day

5-source fiber blend

Protein

Collagen alone lacks tryptophan and is low in leucine.

Other Brands

Collagen-only or single source

First Day

Whey + cultured + collagen

Collagen Dose

Enough for a label claim isn't enough for a mechanism.

Other Brands

Sub-clinical sprinkle

First Day

2.5g VERISOL®, clinical dose

Gut Comfort

The most beneficial fibers are also the most fermentable.

Other Brands

Bloat, or leave them out

First Day

Buffered by a low-FODMAP base

Format

84% say protein clumps or doesn't mix well without a blender.†

Other Brands

Scoop, shake, clumps

First Day

Ready to pour, dissolves instantly

Trusted by experts and families like yours

Dr. Lei Chen

"These vitamins are exactly what I recommend to parents looking for quality nutrition."

Dr. Lei Chen

MD, MHS at Yale University

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Diana V.

"These are the best tasting vitamins I ever purchased. It feels like I am having a treat. These are the only ones so far that my kids like too."

Diana V.

Verified Purchaser

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"A revolutionary approach to children's health."

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Dr. Ed Giovannucci

"We choose partners carefully, and First Day’s dedication to research, formulation integrity, and transparent quality practices makes them a brand we’re proud to align with."

Dr. Ed Giovannucci

MD, MPH, ScD at Harvard University

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of parents see improved health & wellness

0%

of kids ask for their First Day daily

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customer satisfaction rate

FAQ

What are the ingredients?

Bio-Protein Matrix: bioactive collagen peptides (incl. VERISOL®), cell-based cultured protein (S. cerevisiae), whey protein isolate.

Bio-Adaptive Fiber Blend: organic Jerusalem artichoke (Helianthus tuberosus) (tuber) extract, digestion-resistant dextrin, tapioca fiber, partially hydrolyzed guar gum, acacia fiber.

Sweetened with: stevia (Reb M). No added sugar.

Contains: milk (whey). Free from the other 8 major allergens. Gluten-free. Non-GMO.

Other Ingredients: Water, Citric Acid, Natural Flavors. Less than 2% of: Reb M, Beta-Carotene (For Color), Rowanberry Fruit Extract, Mushroom Extract.

Why do you have less than 100% of daily values?

Remember the old adage "more isn't always better"? Many vitamins today use cheap chemicals that our bodies can't absorb in amounts that are much higher than we actually need! In the long term, taking these sorts of vitamins can be harmful to health because our bodies have a tough time getting rid of the excess.

Take plants as an example. Overwatering your plants can damage their roots, wilt the leaves, and ruin their growth. That's why First Day focuses on being a nourishing vitamin filling in the gaps, not overloading you with nutrients.

So, we've consciously formulated our vitamin around what we most commonly lack. Then we made our gummy to fill the gaps in our everyday needs with the finest ingredients.

What else is different about First Day?

We set out by asking the unaddressed questions in the industry. What are supplements really doing for us? Why are they made the way they are?

We found the average multivitamin uses outdated science from 50 years ago.

To separate truth from fiction, our team of experts investigated thousands of clinical studies. That’s why we use the latest science and source the most absorbable ingredients from all around the world so your vitamins are actually working for you and your health.

Should I subscribe if I've never tried First Day before?

Healthy habits are hard to start let alone maintain! We wanted to make it as simple as one-click to building healthy foundations. With your subscription, you get a discount on every order for being a loyal First Day family member! Plus, cancelling a subscription is easy.

For every order, we also have a satisfaction guarantee so you can rest assured knowing we'll always have your back!

Which scientific studies does First Day look at?

Micronutrients, absorption rate, and more! We've combed through the scientific studies so that you don't have to. But if you want to peruse, check out these scientific studies for yourself:

More questions? Find answers on our FAQ page.

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