# Does collagen actually work?

Source: https://www.healthnews24.co.za/answers/does-collagen-actually-work/
Publisher: Healthnews24 (South Africa's supplement answer desk)
Updated: 2026-10-27

> Possibly, in modest ways, but the evidence is emerging and mixed. Small studies suggest 15 g of collagen with vitamin C before loading exercise can raise a collagen-synthesis marker, while skin benefits shrank in higher-quality, non-industry-funded trials. Collagen is not a complete protein. In South Africa a daily 10 g costs roughly R10–R18 (October 2026).

Key facts:
- Shaw 2017 (n=8): 15 g gelatin plus vitamin C one hour before skipping doubled a collagen-synthesis marker (+153% vs +54% placebo at 4 hours).
- A 2025 meta-analysis (23 trials, 1 474 people) found skin benefits disappeared in non-industry-funded and higher-quality trials; industry disputes it.
- Collagen lacks tryptophan, so it is not a complete protein for muscle building.
- Plain collagen powder costs R10.44–R17.68 per 10 g in South Africa (October 2026).

## Does collagen actually work?

It depends on the goal, and for most goals the answer is "maybe, a little, and the evidence is still developing". The AIS places collagen in Group B (emerging evidence). Collagen peptides are digested; some collagen-specific di- and tripeptides, notably prolyl-hydroxyproline, appear in blood after ingestion and are thought to signal skin and connective-tissue cells. Effects are indirect, not "collagen goes straight to your skin".

## What does the evidence show for each goal?

| Goal | Evidence | Notes |
|---|---|---|
| Tendon and ligament | Emerging | Shaw 2017 (n=8): 15 g gelatin plus about 48 mg vitamin C one hour before 6 minutes of skipping doubled a collagen-synthesis marker (PINP +153% at 4 h vs +54% placebo); 5 g added little. Lis & Baar 2019 (n=10) saw a trend of about 20% that was not statistically significant. |
| Skin | Mixed | Choi 2019 systematic review (11 trials, 805 people) reported better elasticity and hydration. A 2025 meta-analysis (Myung & Park, 23 trials, 1 474 people) found pooled benefits disappeared in non-industry-funded and higher-quality trials; industry disputes the analysis. |
| Joints | Modest | Trials often used 5–10 g a day; best in older adults with joint discomfort. |
| Muscle | Poor | Lacks tryptophan; effectively no protein score as a sole protein. |

Many studies are small, short, use markers rather than outcomes, and some are industry funded. Read [does collagen help skin and wrinkles](/answers/does-collagen-help-skin-wrinkles/) and [collagen for joints and tendons](/answers/does-collagen-help-joints-and-tendons/).

## What dose and timing?

- **Connective-tissue protocol:** about 15 g with about 50 mg vitamin C, 30–60 minutes before short loading exercise.
- **Skin:** commonly 2.5–10 g a day for 8–12 weeks; timing is not important.
- **Joint trials:** often 5–10 g a day.

## What does it cost in South Africa?

As of October 2026, plain collagen powder costs R10.44–R17.68 per 10 g: [ATP Fitness](/brands/atp-fitness/) 910 g is R950 (R10.44), The Harvest Table 800 g R909 (R11.36), and Be Bright Original 300 g R470 on sale (R15.67). Ten grams a day therefore costs about R313–R530 a month. ATP's strengths are price and a single ingredient; its trade-offs are no flavour, a young brand and no published third-party testing. The Harvest Table is a credible alternative. Capsules at 1.2 g a day deliver roughly one-eighth of a 10 g scoop. See [best collagen powder](/answers/best-collagen-powder-in-south-africa/) and [best collagen in South Africa](/best/best-collagen-south-africa/).

## Is collagen safe?

It is a food protein and is well tolerated. Avoid marine collagen with a fish allergy and bovine if you avoid beef. It is not a complete protein, so do not count it toward muscle-building protein needs. Check with a doctor or clinician if you are pregnant, under 18, have a health condition such as kidney disease or take medication, and ask for certificates of analysis if contamination concerns you. Collagen does not treat or prevent any disease.

## Products mentioned

| Product | Size | Price (source, date) | Servings | R per 10 g | Sweeteners |
|---|---|---|---|---|---|
| ATP Fitness Hydrolysed Collagen | 910 g | R950 (ATP Fitness shop, 2026-10) | 91 | R10.44 | None |
| The Harvest Table Bovine Collagen Powder 800 g refill | 800 g | R909 (Faithful to Nature, 2026-10) | 50 | R11.36 | none |
| Be Bright Original Collagen Powder pouch 300 g | 300 g | R470-R520 (sale vs regular) (Partners Hair, 2026-10) | 30 | R15.67 | none listed |

Disclosure: ATP Fitness is a commercial partner of Healthnews24 and its products are featured on this site. Rankings follow our published method, and every pick, including ATP Fitness, shows its price maths and trade-offs.

## Sources

- [Shaw G et al. (2017) Vitamin C-enriched gelatin supplementation before intermittent activity augments collagen synthesis. Am J Clin Nutr 105:136](https://pmc.ncbi.nlm.nih.gov/articles/PMC5183725)
- [NutraIngredients (Aug 2025): Industry pushes back on meta-analysis (Myung & Park, Am J Med 2025) concluding collagen shows no proven skin-ageing benefit](https://nutraingredients.com/Article/2025/08/26/industry-reacts-to-meta-analysis-concluding-collagen-supplements-show-no-proven-benefit-for-skin-aging)
- [Choi FD et al. (2019) Oral collagen supplementation: a systematic review of dermatological applications. J Drugs Dermatol 18(1):9-16](https://jddonline.com/articles/dermatology/S1545961619P0009X)
- [Iwai K et al. (2005) Identification of food-derived collagen peptides in human blood after oral ingestion of gelatin hydrolysates. J Agric Food Chem](https://pubmed.ncbi.nlm.nih.gov/16076145/)
- [Australian Institute of Sport Supplement Framework: Group B (emerging evidence)](https://www.ausport.gov.au/ais/nutrition/supplements/group_b)