When Is the Best Time to Take Collagen? What the Research Actually Shows

A morning kitchen counter with a coffee mug, a small bowl of yellow gummy bears and a glass of water, with a wall clock behind

Quick answer

For skin, no clinical trial has compared taking collagen in the morning with taking it at night. The trials that showed benefits had people take it once a day, every day, for 8–12 weeks (de Miranda et al., 2021). The best time is whichever time you'll stick to. The one timing result with direct human evidence is for tendons and ligaments: collagen (as gelatin) plus vitamin C taken about an hour before exercise doubled a marker of collagen synthesis (Shaw et al., 2017).

What happens after you eat collagen?

Hydrolyzed collagen is collagen broken down into short peptides. After you eat it, it's digested to amino acids and small peptides, and some of those peptides get into the bloodstream intact. The best studied is prolyl-hydroxyproline (Pro-Hyp) (Iwai et al., 2005; Ichikawa et al., 2010).

Collagen-derived amino acids and peptides in the blood peak about 1–2 hours after you eat collagen, then fall to about half that level by 4 hours (Iwai et al., 2005; Shaw et al., 2017). Small peptides cross the gut wall through transporters such as PEPT1 (Aito-Inoue et al., 2007). Once in the blood, Pro-Hyp acts as a signal. In lab studies it stimulates skin fibroblasts to multiply and to make hyaluronic acid (Shigemura et al., 2009; Ohara et al., 2010).

Building new collagen in skin takes weeks to months, not hours. That's why consistency over 8–12 weeks matters more than the exact hour of any one dose.

Key takeaway: A dose of collagen shows up in your blood within 1–2 hours, but visible skin changes take weeks of daily use.

Is it better to take collagen at night?

There's a plausible argument, but no direct evidence. Much of the body's growth hormone is released during deep (slow-wave) sleep (Van Cauter et al., 2000), and sleep is when a lot of tissue repair happens. Taking collagen in the evening would put peptides in your blood during that window. But no study has shown better skin results from night-time collagen than from morning collagen, so treat this as a reasonable preference, not a rule.

Sleep itself matters for skin. In one study, chronic poor sleepers showed more signs of skin ageing and recovered more slowly from skin barrier damage than good sleepers (Oyetakin-White et al., 2015).

Should you take collagen on an empty stomach?

It probably doesn't matter much. You'll often see the claim that other food "competes" with collagen for absorption, but there are no human trials showing worse skin results when collagen is taken with meals. Many of the positive trials simply asked people to take collagen once a day, without strict fasting rules. Take it in whatever way makes it a daily habit.

Should you take collagen before a workout?

A woman lacing her running shoes on a bench in a bright studio before a workout, water bottle beside her
For tendons and ligaments, one trial found collagen with vitamin C about an hour before exercise boosted collagen synthesis.

If your goal is tendon, ligament or joint support, this is the timing with the best human evidence. In a randomized trial (Shaw et al., 2017):

  • People took 5 g or 15 g of vitamin C-enriched gelatin (or a placebo) 1 hour before a short skipping session.
  • Collagen-building blood amino acids (glycine, proline, hydroxyproline) peaked 1 hour after the supplement.
  • The 15 g group had double the blood level of a collagen-synthesis marker (PINP) compared with placebo.

That's one small study, and it used gelatin with vitamin C, but it's a real timing signal. Vitamin C is required by the enzymes that build collagen, so getting enough of it through food or a supplement is worthwhile whenever you take collagen.

How much collagen do you need per day?

More isn't better past a point. Doses in skin trials typically ranged from 2.5 g to 10 g a day (de Miranda et al., 2021; Pu et al., 2023). In one placebo-controlled trial, 2.5 g and 5 g of collagen peptides improved skin elasticity after 8 weeks to a similar degree (Proksch et al., 2014). There's no good evidence that very large doses of 20 g or more do anything extra for skin.

Goal Dose used in studies Timing evidence What to do
Skin hydration and elasticity 2.5–10 g/day None comparing times of day Take it daily for 8–12+ weeks, whenever you'll remember
Tendons, ligaments, joints 5–15 g (gelatin + vitamin C) ~1 h before exercise (Shaw et al., 2017) Take it about an hour before training
Night-time repair (theory) n/a Plausible, untested Fine as a preference; don't expect extra results
Timeline showing collagen peptides peaking in the blood 1–2 hours after eating, and skin results after 8–12 weeks of daily use

Can you take collagen with coffee or hot drinks?

Yes. Hydrolyzed collagen is made with heat and enzymes, so a hot drink won't undo its main benefit. It's already broken down into peptides.

Where The Good Jelly Co. fits

We make collagen candy, so we have an interest here.

Consistency is what the evidence actually supports, so the format matters: something you'll want every day beats something you forget. Each 60 g bag of The Good Jelly Co. collagen candy has 6 g of hydrolyzed marine collagen per bag (one bag is one serving), within the 2.5–10 g range used in trials, with 0 g of sugar. Eat it as an afternoon snack, as an evening treat, or about an hour before a workout.

Shop The Good Jelly Co. collagen gummies →

Frequently asked questions

When is the best time of day to take collagen?

There is no proven best time for skin. Clinical trials that showed improvements in skin hydration and elasticity had people take collagen once daily for 8 to 12 weeks, without comparing times of day. Take it whenever you can stick to it every day. For tendons and joints, one trial found benefits from taking collagen with vitamin C about an hour before exercise.

Is it better to take collagen at night?

Possibly, but it isn't proven. Growth hormone is released during deep sleep and tissue repair happens overnight, so night-time collagen is a reasonable idea. No study has shown better skin results from taking collagen at night rather than in the morning.

Should collagen be taken on an empty stomach?

There's no good evidence that it needs to be. Positive skin trials generally asked people to take collagen once a day without strict fasting rules. Taking it consistently matters more than taking it fasted.

How much collagen should I take per day for skin?

Skin trials have used 2.5 to 10 grams of hydrolyzed collagen a day. One placebo-controlled trial found 2.5 g and 5 g improved skin elasticity similarly after 8 weeks. There's no good evidence that very large doses work better for skin.

Can I put collagen in coffee?

Yes. Hydrolyzed collagen is already broken down into peptides using heat and enzymes, so adding it to a hot drink doesn't remove its benefits.

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.

References

  1. de Miranda RB, Weimer P, Rossi RC (2021). Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta-analysis. International journal of dermatology 60(12):1449-1461. PubMed 33742704
  2. Shaw G, Lee-Barthel A, Ross ML, et al. (2017). Vitamin C-enriched gelatin supplementation before intermittent activity augments collagen synthesis. The American journal of clinical nutrition 105(1):136-143. PubMed 27852613
  3. Iwai K, Hasegawa T, Taguchi Y, et al. (2005). Identification of food-derived collagen peptides in human blood after oral ingestion of gelatin hydrolysates. Journal of agricultural and food chemistry 53(16):6531-6. PubMed 16076145
  4. Ichikawa S, Morifuji M, Ohara H, et al. (2010). Hydroxyproline-containing dipeptides and tripeptides quantified at high concentration in human blood after oral administration of gelatin hydrolysate. International journal of food sciences and nutrition 61(1):52-60. PubMed 19961355
  5. Ohara H, Ichikawa S, Matsumoto H, et al. (2010). Collagen-derived dipeptide, proline-hydroxyproline, stimulates cell proliferation and hyaluronic acid synthesis in cultured human dermal fibroblasts. The Journal of dermatology 37(4):330-8. PubMed 20507402
  6. Aito-Inoue M, Lackeyram D, Fan MZ, et al. (2007). Transport of a tripeptide, Gly-Pro-Hyp, across the porcine intestinal brush-border membrane. Journal of peptide science : an official publication of the European Peptide Society 13(7):468-74. PubMed 17554807
  7. Shigemura Y, Iwai K, Morimatsu F, et al. (2009). Effect of Prolyl-hydroxyproline (Pro-Hyp), a food-derived collagen peptide in human blood, on growth of fibroblasts from mouse skin. Journal of agricultural and food chemistry 57(2):444-9. PubMed 19128041
  8. Van Cauter E (2000). Slow wave sleep and release of growth hormone. JAMA 284(21):2717-8. PubMed 11105165
  9. Oyetakin-White P, Suggs A, Koo B, et al. (2015). Does poor sleep quality affect skin ageing?. Clinical and experimental dermatology 40(1):17-22. PubMed 25266053
  10. Pu SY, Huang YL, Pu CM, et al. (2023). Effects of Oral Collagen for Skin Anti-Aging: A Systematic Review and Meta-Analysis. Nutrients 15(9). PubMed 37432180
  11. Proksch E, Segger D, Degwert J, et al. (2014). Oral supplementation of specific collagen peptides has beneficial effects on human skin physiology: a double-blind, placebo-controlled study. Skin pharmacology and physiology 27(1):47-55. PubMed 23949208