Estalife Collagen Peptides 6600MG | Vitamin C + Whitening Glutathione + Grape Juice |
Couldn't load pickup availability
See what our customers say
FREE SHIPPING FOR SG $50>
90-DAY GUARANTEE MONEY-BACK
35,000+
Boxes sold
4.9 / 5
2,500 REVIEWS
6,600mg
Clinical dose — not 1–2g
Over 70% <1000 Da
Peptide size — highly absorbable
01 . Our certifications & third-party lab tests
Every certificate is issued by an independent body. Every lab report is produced by an accredited third-party laboratory — not us.
Independently certified. Not self-declared
Our Ang Mo Kio facility holds NSF GMP certification, SOCOTEC GMP certification, and U.S. FDA registration. All three are issued by independent bodies. None are self-declared. This product is also MUIS Halal certified, covering all ingredients, manufacturing processes, machinery, and staff protocols. GMP certification is the international standard for supplement quality.
View all certificates and 3rd party lab reports
Every product's heavy metal and microbial lab reports are publicly available. No sign-in required.
Certificates shown on the linked page are the originals — unedited, directly from the issuing bodies.
02 . Made in Singapore's Largest NSF GMP Certified Supplements Factory
Our family has been in the nutrition industry for over 20 years. The same manufacturing facility also uses the same machines, ingredients and processes to manufacture supplements and health foods for hospitals, clinics, and global brands. Now with Estalife, we sell directly to you, without the middlemen.
Certifications — what they actually mean
03 . Most collagen products don't use enough — here's what the research actually requires
Clinical studies on skin improvement use 2.5–10g of collagen peptides per day. Most Singapore products use 1–2.5g — enough to print "collagen" on the label, not enough to replicate the doses used in the research that proves it works.
Proksch et al., Skin Pharmacology and Physiology, 2014
"Collagen peptides work by signalling fibroblasts to produce new collagen. That signal is dose-dependent. Below 2,500mg, the signal is too weak to produce a measurable change."
04 . What's inside — three ingredients that work together
6,600mg
Hydrolysed Marine Fish Collagen Peptides (Type I)
Derived from deep-sea fish scales and skin. Hydrolysed into peptides as small as 189 Daltons — near the optimal size for intestinal wall absorption. Once absorbed, these peptides signal fibroblasts to produce new collagen and hyaluronic acid. Marine collagen is predominantly Type I, the same type that makes up 80% of skin collagen.
Marine Type I collagen is the most relevant form for skin. The 189 Da peptide size matters — larger fragments are absorbed far less efficiently.
Ohara et al., Journal of Dermatology, 2010
Pu et al., Nutrients, 2014
Asserin et al., Journal of Cosmetic Dermatology, 2015
100mcg
L-Glutathione (Reduced Form)
The body's master antioxidant. Glutathione neutralises free radicals and is known to inhibit tyrosinase — the key enzyme involved in melanin production. The reduced form is biologically active form and readily utilised by the body's cells for antioxidant functions.
Glutathione works together with Vitamin C in the antioxidant recycling network. Vitamin C regenerates oxidised glutathione back to its active reduced form; glutathione reactivates oxidised vitamin C. They are supporting each other simultaneously.
Weschawalit et al., Clin Cosmet Investig Dermatol, 2017
Lee et al., Physical Activity and Nutrition, 2023
250mg
Vitamin C (Ascorbic Acid)
An essential co-factor in the enzymatic hydroxylation of unfolded procollagen chains to mature functional triple-helix collagen. Vitamin C is not optional - it is a required building material for the process that collagen peptides trigger.
This is why collagen-only products are incomplete. You cannot build new collagen without Vitamin C at an adequate dose.
Telang, Indian Dermatol Online J, 2013
Linus Pauling Institute, Oregon State University — Vitamin C and Skin Health. lpi.oregonstate.edu
05 . Key benefits — what the science shows
Skin elasticity and firmness
Subjects taking 5g daily showed significantly improved skin elasticity at 4 and 8 weeks versus placebo in a double-blind trial.
Proksch et al., Skin Pharmacology and Physiology, 2014
Skin hydration and moisture
Oral collagen peptides increase skin hydration by stimulating hyaluronic acid production in the dermis. Effects were measurable at 4 weeks in subjects taking collagen peptides daily.
Miyanaga et al., Skin Pharmacology and Physiology, 2021
Brightness and even skin tone
Glutathione inhibits tyrosinase, the enzyme driving melanin production. Vitamin C reinforces this through a separate antioxidant pathway. Two mechanisms, one sachet.
Arjinpathana & Asawanonda, Journal of Dermatological Treatment, 2010
Sarkar et al., International Journal of Dermatology, 2024
Hair and nail strength
Studies show improved hair and scalp condition at daily consumption over 12 weeks. An open-label trial has also showed a 42% reduction in broken nails and a 12% increase in nail growth rate.
Hexsel et al., Journal of Cosmetic Dermatology, 2017
Reilly et al., Dermatology Research and Practice, 2024
06 . Why Jia formulated it this way
Jia
Estalife Founder
Certified Nutritionist since 2018
100% Singaporean Family-Owned Factory
"Honestly never thought we'd go back to making so many sachet collagen products. I restarted our sachet line because sometimes this industry is just like fashion. Sachets were huge in the late 1900s and early 2000s, then made way for glass bottles because they were seen as the healthier, more premium format. If you asked me about this 5 years ago, I would have said it's impossible for us to go back to sachets. But after trying them again myself, I couldn't resist either. They're just so much easier to carry around than glass bottles (I was always afraid I'd break mine on travel trips). And after years of pure powder with no flavours, it's been such a refreshing phase going back to flavoured drinks. The healthiest format is still pure powder, so if you want the best of both worlds, do a rotation like me!
Every batch is third-party lab tested before it leaves our facility, same as all our products.
One thing I want to say openly: collagen has a lot of misinformation on both sides. The naysayers claim it's a scam and too big to be absorbed, while some brands oversell it as a miracle protein that can replace your skincare or fix every skin issue. Both are wrong. Collagen as a whole protein is indeed too big to be absorbed, but that's old news. We've had the technology to break it down into collagen peptides (small enough to be efficiently absorbed) for decades, with tons of RCTs proving the cause-and-effect of supplementation. That said, it's not a miracle. Daily sunscreen will do more for long-term skin ageing than daily collagen ever will. Our body is a big complex system, and collagen isn't there to replace anything. It works alongside your diet, exercise and skincare. I'll do a full long-form video on this one day, keep a lookout!
Thank you for all your love so far!"
07 . Same ingredient — very different dose and price
3–6×
Most Singapore collagen products use 1,000-2,500mg per serving. Clinical studies require at least 2,500mg to show measurable skin improvement.
| WHAT TO CHECK | OTHER BRANDS | ESTALIFE 6,600MG | WHY IT MATTERS |
|---|---|---|---|
| Collagen dose | 1,000–2,500mg | 6,600mg | Human RCTs demonstrating skin elasticity improvement used 2.5g minimum. Estalife delivers 6.6g — the clinical doses in one serving. |
| Peptide size | Often unspecified | Over 70% <1000 Da | Smaller peptides cross the gut wall more efficiently. Low molecular weight <1000Da is the optimal range for intestinal absorption. |
| Vitamin C | Absent or 30–60mg | 250mg — functional dose | Without Vitamin C, ingested collagen peptides cannot be converted into functional collagen fibre. |
| Glutathione | Absent or proprietary blend | 100mcg reduced (active) form | Reduced glutathione inhibits tyrosinase — the enzyme responsible for melanin production — and pairs with Vitamin C, which helps regenerate it to its active form. |
| Price per box | $45–$80 | $29.99 | We own our own factory and sell directly to you. No distributor or retailer markups. |
08 . What to expect — a realistic skin timeline
Collagen works from the inside out. Results are gradual. Here's what the published studies show at each stage.
Week 2–8
Hydration and texture improved
Oral collagen peptides significantly increased skin hydration. Most users reported improved skin smoothness, reduced dryness, and a slight plumping effect.
Pu et al., Nutrients, 2014
Proksch et al., Skin Pharmacology and Physiology, 2014
Month 3–6
Elasticity and firmness improve measurably
Skin hydration increased, the elasticity index improved, and fine lines were reduced. Notable enhancements in dermal density were also observed. Improvements in scalp scaling and overall hair condition were seen compared to placebo at Week 12.
Reilly et al., Dermatology Research and Practice, 2024
Miyanaga et al., Skin Pharmacology and Physiology, 2021
Zmitek et al., Nutrients, 2024
Month 6 onwards
Nail growth and strength
At 24 weeks, 64% showed clinical improvement in brittle nails; 42% reduction in broken nail frequency; 12% increased in nail growth rate.
Hexsel et al., Journal of Cosmetic Dermatology, 2017
Individual results vary. These timelines reflect published clinical data — not a guarantee. Visible results depend on age, skin condition, baseline collagen levels, diet, and consistency of use.
09 . How to take it
One sachet daily. The sweet grape flavour makes it easy to take every day.
2
Take it daily. The grape juice flavour makes it easy to build a consistent habit.
3
Best on an empty stomach. Either in the morning or before bed.
4
Continue for at least 8–12 weeks, as published clinical trials have shown measurable improvements in skin condition within this timeframe.
If you have a fish allergy, consult your doctor before use. Our collagen is derived from freshwater fish. If pregnant, breastfeeding, or on medication, consult a doctor before taking any supplement.
Pairing guide — Jia's beauty stack
10 . Frequently asked questions
11 . What customers say
4.9
2,500 verified reviews
85% report improved skin texture within 4 weeks
Skin texture · Brightening
"Six weeks in and my colleagues keep asking what I've changed. Skin looks noticeably more even and my pores appear smaller. The grape juice taste is genuinely nice — not chalky at all."
Priya S., 34
Verified · Shopee SG
Hair & nails · Long-term user
"Switched from a $65 pharmacy brand with only 1,500mg. After researching I realised that dose was probably too low. After 3 months on Estalife my nails are significantly stronger and my hair feels thicker."
Mei Lin T., 41
Verified · TikTok Shop
First timer · Buying for mum
"Bought the $2.99 trial sachet for my mother first — she liked the taste and the fact that it's made locally. She's on her second box now and says her skin feels more supple. Great to support a Singapore brand."
Kenny L., 32
Verified · Lazada SG
Research Sources & Citations
All claims on this page are supported by published human clinical research. Only human RCTs and meta-analyses of human RCTs are cited. No animal or in vitro studies are referenced as evidence for product claims.
Proksch E, Segger D, Degwert J, Schunck M, Zague V, Oesser S. Oral supplementation of specific collagen peptides has beneficial effects on human skin physiology: a double-blind, placebo-controlled study. Skin Pharmacol Physiol. 2014;27(1):47–55. doi.org/10.1159/000351376
Proksch E, Schunck M, Zague V, Segger D, Degwert J, Oesser S. Oral intake of specific bioactive collagen peptides reduces skin wrinkles and increases dermal matrix synthesis. Skin Pharmacol Physiol. 2014;27(3):113–119. doi.org/10.1159/000355523
Asserin J, Lati E, Shioya T, Prawitt J. The effect of oral collagen peptide supplementation on skin moisture and the dermal collagen network: evidence from an ex vivo model and randomized, placebo-controlled clinical trials. J Cosmet Dermatol. 2015;14(4):291–301. doi.org/10.1111/jocd.12174
Kim D-U, Chung H-C, Choi J, Sakai Y, Lee B-Y. Oral intake of low-molecular-weight collagen peptide improves hydration, elasticity, and wrinkling in human skin: a randomized, double-blind, placebo-controlled study. Nutrients. 2018;10(7):826. doi.org/10.3390/nu10070826
Hexsel D, Zague V, Schunck M, Siega C, Camozzato FO, Oesser S. Oral supplementation with specific bioactive collagen peptides improves nail growth and reduces symptoms of brittle nails. J Cosmet Dermatol. 2017;16(4):520–526. Open-label, no placebo control — nail improvement; no placebo-controlled human trial on collagen and hair growth currently exists. doi.org/10.1111/jocd.12393
Weschawalit S, Thongthip S, Phutrakool P, Asawanonda P. Glutathione and its antiaging and antimelanogenic effects. Clin Cosmet Investig Dermatol. 2017;10:147–153. doi.org/10.2147/CCID.S128339
DePhillipo NN, Aman ZS, Kennedy MI, Begley JP, Moatshe G, LaPrade RF. Efficacy of vitamin C supplementation on collagen synthesis and oxidative stress after musculoskeletal injuries: a systematic review. Orthop J Sports Med. 2018;6(10):2325967118804544. doi.org/10.1177/2325967118804544
Postlethwaite AE, Seyer JM, Kang AH. Chemotactic attraction of human fibroblasts to type I, II, and III collagens and collagen-derived peptides. Proc Natl Acad Sci USA. 1978;75(2):871–875. doi.org/10.1073/pnas.75.2.871
Key Benefits:
-
Enhances Skin Elasticity & Hydration:
- Marine Collagen Peptides (6600mg): Collagen peptides support the skin’s structure, improving elasticity and reducing wrinkles, giving your skin a firmer and more hydrated appearance.
-
Boosts Antioxidant Protection:
- L-Glutathione (100mcg): Known for its skin-brightening properties, L-Glutathione promotes an even skin tone while reducing pigmentation. It also offers powerful antioxidant protection, helping to fight free radicals and reduce oxidative stress.
-
Supports Collagen Formation:
- Vitamin C (250mg): Vitamin C is essential for collagen synthesis, aiding the body in producing new collagen. It also provides antioxidant support, protecting the skin from environmental damage and supporting a radiant complexion.
-
Promotes Joint Health:
- Collagen Peptides: Beyond skin benefits, collagen peptides maintain healthy joints by supporting cartilage, reducing discomfort, and improving joint flexibility.
Ingredients:
-
Marine Collagen Peptides (6600mg):
- Source: Hydrolyzed collagen peptides for optimal absorption and bioavailability.
- Function: Improves skin elasticity, reduces wrinkles, supports joint health, and promotes healthy hair and nails.
-
Vitamin C (250mg):
- Function: Enhances collagen production, provides antioxidant protection, and brightens the skin for a more radiant complexion.
-
L-Glutathione (100mcg):
- Function: A powerful antioxidant that supports skin brightening, evens out skin tone, and protects cells from oxidative stress.
Directions for Use:
Take 1 sachet daily, or as directed by a healthcare professional. Store in a cool, dry place.