Collagen: 4 Key Benefits & How Much Should You Take?

As we age, natural collagen production gradually declines, while factors such as excessive sun exposure and smoking can contribute to collagen breakdown. This natural change has contributed to the growing interest in collagen supplements and their potential role in supporting different aspects of health.

What Does Collagen Do in the Body?

Collagen acts as part of the body’s internal structural framework, helping tissues maintain their shape, strength, and resilience. [1]

It is particularly important for:

• • Skin: Contributes to skin structure, firmness, and elasticity.
  • Bones: Forms an important part of the organic framework of bone.
  • Joints and cartilage: Supports the connective tissues involved in joint structure and movement.
  • Tendons and ligaments: Provides strength and helps connect muscles and bones.
  • Blood vessels: Contributes to the structural integrity of vessel walls.
  • Other connective tissues: Helps provide structural support throughout the body.
  • Tissue repair: New collagen formation is part of the body’s normal healing process.

Because collagen is distributed throughout the body, its role extends well beyond its popularity in beauty and skincare products.

Why Does the Body Need Collagen?

The body continuously breaks down and rebuilds collagen as part of normal tissue maintenance. Maintaining adequate collagen production is therefore important for preserving the structure and function of connective tissues over time. [1] Collagen production naturally changes with age, while environmental factors such as UV exposure can contribute to collagen degradation, particularly in the skin. Supporting overall nutrition and healthy lifestyle habits can help provide the nutrients and conditions the body needs for normal collagen production.

What Are the Potential Benefits of Collagen?

Collagen supplements have been studied for several health outcomes, with research focusing particularly on skin and joint health. Studies have also explored potential applications involving bone health, exercise, and connective tissues.

1. Skin Health

Hydrolyzed collagen peptides have been studied for their potential effects on measures such as skin hydration, elasticity, and wrinkle appearance. Some clinical trials have reported improvements following regular supplementation, although results vary between studies and formulations. [2]

2. Joint Health

Certain collagen preparations have been investigated for their potential to support joint comfort and function. Undenatured Type II collagen, in particular, has been studied for joint-related outcomes and differs considerably from hydrolyzed collagen peptides in both form and dosage. [3]

3. Bone Health

Collagen forms part of the organic structure of bone, which has led researchers to investigate whether collagen supplementation may support bone-related outcomes. However, collagen should complement—not replace—established approaches such as adequate calcium and vitamin D intake, weight-bearing exercise, and a balanced diet.

4. Muscle and Connective Tissue Support

Collagen provides amino acids used in connective tissue maintenance, and research has explored its use alongside exercise for outcomes involving tendons, ligaments, and physical performance. However, collagen is not a complete protein, so it should not automatically replace higher-quality dietary protein sources.

Where Does Collagen Come From?

Collagen supplements are generally derived from animal sources and processed into forms that are easier to consume and digest.

Common sources include:

• • Bovine collagen: Usually derived from cattle hides or bones and commonly provides Type I and Type III collagen.
  • Marine collagen: Typically derived from fish skin or scales and primarily associated with Type I collagen.
  • Chicken collagen: Often associated with Type II collagen and commonly used in joint-focused formulations.
  • Porcine collagen: Derived from pigs and used in various collagen products.

The source can influence the type of collagen, formulation, dietary suitability, and potential allergen considerations.

Collagen From Food vs. Supplements

You don’t necessarily need a collagen supplement to provide your body with the building blocks it uses to produce collagen. Foods such as gelatin, bone broth, fish skin, and connective-tissue-rich meats contain collagen or collagen-derived proteins. Other protein-rich foods provide amino acids used in protein synthesis, while vitamin C-rich foods provide an important nutrient involved in normal collagen formation. A varied diet containing adequate protein, fruits, vegetables, and other nutrient-rich foods therefore provides an important nutritional foundation for collagen production.

However, collagen-containing foods and hydrolyzed collagen supplements are not identical. Hydrolyzed collagen has been processed into smaller peptides, and different collagen preparations have been studied for different purposes.

How Much Collagen Should You Take Per Day?

There is no single standardized collagen dosage that applies to everyone. The amount used in research varies according to the type of collagen, formulation, and health goal. Hydrolyzed collagen peptides are generally studied in gram-level amounts, while undenatured collagen preparations may be used in much smaller quantities. This distinction is important when comparing products or deciding how much collagen to take.

Collagen Intake for Skin Health

Studies investigating skin health have used a range of collagen peptide doses. Daily amounts of approximately 2.5 g to 10 g have been studied, with some research using even smaller amounts. [2] The evidence suggests that regular supplementation may support measures such as skin elasticity and wrinkle appearance in some people. However, the dose used in one study should not automatically be considered the ideal amount for every person or collagen product.

Collagen Intake for Joint Support

Undenatured Type II collagen has been studied at doses around 40 mg per day for certain joint-related outcomes. [3] This is considerably lower than the gram-level amounts commonly used for hydrolyzed collagen peptides. The two forms should not be considered interchangeable simply because both are labelled as collagen.

Gelatin vs. Collagen Peptides: What to Know

Gelatin is produced by partially breaking down collagen through heat and processing. It is commonly used as a food ingredient in products such as desserts and other recipes. Research has explored potential antioxidant and anti-inflammatory properties of gelatin, but clear standardized dosing guidelines for specific health outcomes have not been established. [4] If you use gelatin as part of your diet, follow the serving instructions for the specific product or recipe rather than assuming that a gelatin serving is equivalent to a studied collagen peptide dose.

How to Choose a Collagen Supplement

If you decide to try collagen, don’t choose a product simply because it contains the largest number of grams on the label.

Consider:

• • Collagen type: Check whether the product contains hydrolyzed collagen peptides, undenatured Type II collagen, or another form.
  • Source: Look for bovine, marine, chicken, or porcine sources according to your dietary needs and preferences.
  • Amount per serving: Check the actual collagen content rather than relying on scoop or capsule size.
  • Additional ingredients: Review sweeteners, flavors, allergens, and other active ingredients.
  • Product quality: Choose reputable manufacturers and look for independent or third-party testing where available.
  • Serving instructions: Follow the manufacturer’s recommended serving rather than assuming that a higher dose will produce better results.

What to Know Before Taking Collagen Daily

Collagen supplements appear to be generally well tolerated in studies, although some people may experience minor digestive symptoms. Safety assessments have not identified serious adverse events as a common concern with the collagen preparations studied. [5]

Possible side effects may include:

• • Mild digestive discomfort
  • Bloating
  • Unpleasant taste or aftertaste
  • Changes in stool consistency

The source of collagen also matters for people with food allergies or dietary restrictions. For example, people with fish allergies may need to avoid marine collagen. If you are pregnant, breastfeeding, have an existing medical condition, or take medications regularly, speak with a healthcare professional before starting a new supplement.

 

The Bottom Line

Collagen is an essential protein that helps maintain the body’s structure, from skin and bones to joints and connective tissues. While collagen supplements may offer benefits for specific health goals, the right amount depends on the type of collagen and what you’re taking it for. Rather than chasing higher doses, focus on choosing a well-formulated product, following its recommended serving, and making collagen part of an overall balanced approach to nutrition and health.