Pack size: 150 g

ShopAmino acids and proteins

Doctor Life

Collagen & Glycine

Fish and bovine collagen peptides

106,99 zł

Combines fish and bovine collagen peptides in one formula
Provides added glycine, an amino acid found in collagen's structure
Collagen peptides have been studied in numerous randomized human trials

Overview

Collagen peptides from two sources, with added glycine. Collagen & Glycine combines hydrolyzed fish and bovine collagen in one daily formula. Hydrolysis breaks large collagen molecules into smaller, more readily soluble peptides, distinguishing these ingredients from conventional gelatin.

At the heart of the formula / Collagen & Glycine

Thoughtful support. Clear purpose.

01Combines fish and bovine collagen peptides in one formula
02Provides added glycine, an amino acid found in collagen's structure
03Collagen peptides have been studied in numerous randomized human trials
04Studies using servings near this product's range examine skin, joints, and bones
05Hydrolyzed peptides dissolve readily in a drink
06A convenient powder for daily supplementation
07Natural flavors and steviol glycosides make it easy to enjoy

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Collagen & Glycine

Made for your daily routine.

The formula combines fish and bovine collagen peptides with free glycine. Glycine is a defining component of collagen, appearing at every third position in its characteristic Gly-X-Y sequence.

Human trials of specific collagen peptides have examined skin measures, activity-related joint discomfort, and bone mineral density, often using around 5 g daily. This formula provides 4 g of collagen peptides plus added glycine. Those study results should not be assumed to apply to a different amount or peptide blend.

Mix the powder into warm water. Natural flavors and steviol glycosides make it a practical alternative to capsules for a regular collagen routine.

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Collagen & Glycine

Why combine collagen and glycine?

Collagen is the body's most abundant structural protein and forms part of skin, bone, cartilage, tendons, and ligaments. Its characteristic Gly-X-Y sequence places glycine at every third position. Hydrolyzed collagen provides smaller peptides, while the added glycine supplies this amino acid in free form.

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Collagen & Glycine

What research informs Collagen & Glycine?

Trials of specific collagen peptides have explored several tissues. One study in 85 women used 5 g daily for 84 days and assessed skin hydration and density. A trial in 180 active young adults examined exercise-related knee discomfort, and a 12-month study in postmenopausal women assessed bone mineral density. This product provides 4 g of a different peptide blend plus glycine, so those findings do not establish its effects.

Ingredients / Doctor Life

Every ingredient. Clearly explained.

Each ingredient, its form and quantity — in one place.

Ingredient amounts for the servings shown in the table.
Ingredient	1 scoop
Fish collagen peptides	2000 mg
Bovine collagen peptides	2000 mg
Glycine	1000 mg

*NRV: Nutrient Reference Value

Full ingredient list

Hydrolyzed fish collagen, hydrolyzed bovine collagen, glycine, natural flavors, sweeteners: steviol glycosides.

How to use

Part of your daily rhythm.

How to use

Dissolve 1 scoop (5 g) in 150–200 mL of warm water. Stir, wait a few minutes until fully dissolved, then drink.

Important information

Do not exceed the recommended daily serving. Food supplements should not replace a varied diet. A balanced diet and a healthy lifestyle are recommended. Do not use if you are allergic or intolerant to any ingredient. Store at room temperature, away from sunlight and out of reach of young children.

Science & sources

Understand the formula.

The studies most relevant to this formula used 5 g of collagen peptides daily, compared with 4 g of collagen peptides in a daily serving of this product. These selected randomized trials examine three areas commonly associated with collagen: skin, joint comfort, and bones.

These publications concern the studied ingredients or formulas. They do not all evaluate the finished Doctor Life product, and research results do not guarantee individual outcomes.

01Influence of collagen peptide supplementation on visible signs of skin and nail health and -aging in an East Asian population: A double blind, randomized, placebo-controlled trial

Sara Vleminckx, Nicolina Virgilio, Jerome Asserin, Janne Prawitt, Catarina I. F. Silva

Journal of Cosmetic Dermatology (2024), 23(11), 3645-3653. DOI: 10.1111/jocd.16458; PMID: 39143887.

In a randomized, double-blind study, 85 healthy women ages 43–65 took 5 g of collagen peptides or a placebo. After 84 days, skin density and hydration were significantly higher in the collagen group. Improvements in elasticity, wrinkle appearance, and nail appearance were observed earlier in the study. The 5 g dose is close to the combined amount of collagen peptides and glycine in a daily serving of Collagen & Glycine.

Read publication ↗

02The Influence of Specific Bioactive Collagen Peptides on Knee Joint Discomfort in Young Physically Active Adults: A Randomized Controlled Trial

Denise Zdzieblik, Judith Brame, Steffen Oesser, Albert Gollhofer, Daniel König

Nutrients (2021), 13(2), 523. DOI: 10.3390/nu13020523; PMID: 33562729.

In a 12-week randomized trial, 180 active adults ages 18–30 with exercise-related knee discomfort received 5 g of specific collagen peptides or a placebo. Activity-related pain decreased significantly more in the collagen group, according to both participant and physician assessments. The findings contribute to research on regular collagen peptide supplementation and joint comfort in active adults.

Read publication ↗

03Specific Collagen Peptides Improve Bone Mineral Density and Bone Markers in Postmenopausal Women-A Randomized Controlled Study

Daniel König, Steffen Oesser, Stephan Scharla, Denise Zdzieblik, Albert Gollhofer

Nutrients (2018), 10(1), 97. DOI: 10.3390/nu10010097; PMID: 29337906.

In a 12-month randomized, double-blind trial, 131 postmenopausal women with reduced bone mineral density received 5 g of specific collagen peptides or a placebo. Spine and femoral neck bone mineral density increased significantly in the collagen group compared with the control group, alongside a favorable change in the bone formation marker P1NP. The study extends collagen peptide research beyond skin to bone health.

Read publication ↗

FAQ / Collagen & Glycine

Good questions. Clear answers.

Talk to us ↗

How should I compare 4 g of collagen peptides with larger servings?

A larger powder serving does not automatically mean a better outcome. Some clinical trials used 5 g of specific collagen peptides daily, while this formula provides 4 g. The peptide preparation, amount, and study conditions all matter; similar amounts are not proof of equivalent results.

Why combine fish and bovine collagen?

No single source is universally best for every purpose. This formula uses two hydrolyzed collagen sources, with the amount of each stated in the ingredient table. Combining sources alone does not establish a superior effect.

Why add glycine when collagen already contains it?

Glycine is abundant in collagen and appears at every third position in its characteristic sequence. The added glycine is supplied as a separate free amino acid, alongside the collagen peptides.

Must collagen always be taken at the same time as vitamin C?

Vitamin C contributes to normal collagen formation for skin, bone, and cartilage function. It does not have to be taken at the exact same moment as each collagen serving. What matters is meeting your vitamin C needs through your overall diet.

Is hydrolyzed collagen the same as gelatin?

No. Both come from collagen, but hydrolyzed collagen has been broken down further into smaller peptides. It dissolves more readily and does not form a typical gelatin gel. Many supplement studies use hydrolyzed peptides.

Can collagen replace dietary protein or a protein supplement?

No. Collagen has a distinct amino acid profile and is not a complete protein replacement. Treat it as a separate supplement, alongside adequate complete protein in your diet.

Is this suitable for someone with a fish allergy?

No. The formula contains fish collagen hydrolysate. Do not use it if you are allergic to fish or any other ingredient.

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