The science behind collagen

What collagen actually is, why it is sold as hydrolyzed peptides, what the research has and has not shown, and exactly what goes into every Soft Friday scoop.

Loose collagen peptide powder in a glass dish beside a brass measuring scoop on a travertine surface

What is collagen?

Collagen is a structural protein found throughout the body, including the skin, bones, tendons, ligaments and other connective tissues.

Three protein strands wind around each other into a rope-like triple helix. Bundled together, those ropes form the scaffolding that gives many tissues their structure and tensile strength.

The body builds collagen from amino acids, and vitamin C takes part in its normal production. Genetics, sun exposure, smoking, nutrition and sleep all affect it, so no supplement replaces a balanced diet or a healthy routine.

Three strands wound around each other into a single rope, illustrating collagen's triple-helix structure
A simplified illustration of the triple-helix structure, not a microscopic image.

Collagen falls away slowly, then keeps falling

This is the reason collagen supplements exist at all. Skin collagen does not drop off a cliff at a particular birthday, it declines steadily across adult life.

About 1% a year

Shuster and colleagues measured forearm skin in 148 adults aged 15 to 93 and found skin collagen density falls roughly one per cent per year through adult life, at a similar rate in men and women.

That is a population average from a 1975 study, not a promise about any one person, and not something a supplement has been shown to reverse.

Chart showing relative skin collagen declining from 100 per cent at age 20 to about 50 per cent at age 70 100% 80% 60% 40% 20 30 40 50 60 70
Relative skin collagen density by age, drawn from the roughly 1% per year decline reported in Shuster, Black & McVitie, Br J Dermatol, 1975. Indexed to 100% at age 20. Individual results vary widely.
Soft Friday Daily Glow Collagen in chocolate

What Daily Glow uses

Both flavors start with hydrolyzed collagen peptides from grass-fed bovine hide, providing collagen Types I and III.

Hydrolysis breaks collagen into shorter peptide chains, which is what makes the powder disperse into a drink instead of clumping on the surface. That is the whole reason the peptide form exists.

  • Grass-fed bovine hide collagen source
  • Collagen Types I and III
  • Chocolate and pure unflavored options
  • Manufactured in the USA

Two flavors, one foundation

Pick the one that fits the drinks you already make. The full ingredient list is printed below, with nothing hidden behind a proprietary blend.

Rich cocoa ritual

Chocolate · 378g

Hydrolyzed collagen peptides (from bovine hide), cocoa powder, acacia powder, natural flavor, sodium chloride, xanthan gum, stevia extract powder (Reb A), and silica.

Suggested use
Mix two scoops into 8–10 oz (236–295 ml) of a hot or cold drink in a shaker cup or blender.
Product facts
Gluten-free, non-GMO, manufactured in the USA.

Pure everyday mixing

Unflavored · 280g

One ingredient: bovine hide collagen peptides. No cocoa and no added flavor, so it disappears into water, coffee, smoothies, or whatever you already drink.

Suggested use
Add one level scoop to 8–10 oz (236–295 ml) of chilled water or a preferred drink and stir for about five seconds.
Product facts
Gluten-free, lactose-free, corn-free, manufactured in the USA.

Where collagen peptides are being studied

Human trials have looked at hydrolyzed collagen in skin appearance and joint symptoms. Studies differ in product, dose, and duration, and results are not the same for everyone.

Skin hydration and elasticity

A 2021 systematic review and meta-analysis of clinical trials of hydrolyzed collagen supplementation for skin aging outcomes.

Read the study

Joint symptoms

A meta-analysis of randomized, placebo-controlled trials of collagen-based supplements and osteoarthritis symptom scores.

Read the study

Read all of it alongside your total protein intake, movement, sleep, sun protection and advice from a qualified healthcare professional. A supplement is one input among many, and the honest answer is that the evidence base is still developing.

What “hydrolyzed” actually means

Whole collagen proteins are large. Hydrolysis is a controlled process that cuts them into much shorter chains called peptides.

After you drink it, digestive enzymes keep breaking those peptides down into smaller peptides and amino acids. Your body then draws on that pool wherever it is needed, which is why no collagen powder can direct nutrients to one particular part of you.

A long unbroken chain of beads above, and the same chain cut into short separate segments below
A simplified illustration. Real peptide chains vary in length and are far smaller than shown.

Know exactly what you are taking

Daily Glow is a bovine-derived dietary supplement manufactured in the USA. It is not suitable for vegetarian or vegan diets.

Store the tub somewhere cool and dry, out of direct light. Keep it out of reach of children, and do not use it if the safety seal is damaged or missing.

Two hands turning a Soft Friday tub to read the ingredient panel

Check before you start

Speak with a qualified healthcare professional first if you are pregnant, breastfeeding, taking medication or managing a health condition.

Read the label

The chocolate formula contains natural flavor and other ingredients beyond collagen. Unflavored contains bovine collagen peptides and nothing else.

Give it weeks, not days

Collagen is not an overnight fix. The trials that exist measure consistent use over weeks or months, and individual results vary.

Not medical advice

Dietary supplements are not intended to diagnose, treat, cure or prevent disease, and nothing on this page replaces medical care.

Make collagen part of your Friday feeling.

Choose chocolate or unflavored, then pick the pack size that makes the daily habit easiest to keep.

Shop Daily Glow Collagen

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. The educational information on this page is not medical advice.