The 2025 U.S. trademark application associated with Peng, Yi covers dietary food supplements, pet supplements, urinary-health supplements, gummy vitamins, ketogenic/weight-loss nutritional products, liquid vitamin supplements, medicated skincare preparations, and carbohydrate powders.[1] The Philippine Intellectual Property Office’s 2025 publication likewise lists COOLKIN under Peng, Yi [CN], Class 5, which covers pharmaceutical, veterinary and sanitary preparations and related goods.[2]

The history of the Coolkin name is complex because COOLKIN does not necessarily represent a single worldwide company or corporate group.

An earlier U.S. COOLKIN trademark was filed in August 2020 and registered in April 2021 to Liu, Ying, but that registration concerns jewelry and watches rather than dietary supplements.[1]

A separate COOLKIN trademark application was filed in the United States on January 8, 2025, by Peng, Yi. Unlike the earlier jewelry trademark, this application specifically covers dietary and nutritional supplements. The application describes the logo as the word “COOLKIN” alongside a circular design made from five curved shapes.[1]

This distinction is significant: the 2020/2021 jewelry trademark should not automatically be treated as evidence of the history of the current supplement brand.

Coolkin’s current online product assortment is particularly concentrated around general wellness and nutritional supplementation.

Antioxidant and wellness supplements

One of the most visible Coolkin product categories is astaxanthin. Coolkin-branded astaxanthin products are marketed for areas such as antioxidant support, eye health, cardiovascular health, and general wellness. Multiple Coolkin astaxanthin listings are currently visible on Philippine e-commerce marketplaces.[2]

The brand is also associated with products containing ingredients such as Schisandra, with marketplace descriptions positioning these products around traditional adaptogenic and general wellness uses.[2]

Sports nutrition

Coolkin also has a sports-nutrition presence. For example, Coolkin Creatine Monohydrate is sold as a sports-nutrition product intended to support exercise and strength.[2]

This gives the brand a portfolio extending beyond conventional vitamins into products aimed at people interested in fitness, exercise performance, and active lifestyles.

Omega-3 and fish oil

Coolkin-branded fish oil/Omega-3 products are also sold online. A Walmart listing identifies Coolkin as the brand of a fish-oil product containing EPA and DHA and markets it toward cardiovascular, cognitive, eye, joint, and general wellness support.[3]

Eye-health products

The brand also appears in the eye-health supplement category. TikTok Shop listings, for example, show a Coolkin lutein product containing ingredients including vitamin A, bilberry, and goji berry.

Metabolism and weight-management products

Coolkin products have also been marketed around metabolism and weight management, including apple-cider-vinegar capsules and products described as fat burners. Marketplace listings should, however, be treated as seller/product claims rather than independent medical evidence of effectiveness.[2]

Cognitive and nootropic products

Another category associated with the brand is cognitive/mental-performance supplementation. A Blibli listing, for example, describes a Coolkin product called NeuroOctane, containing ingredients such as L-tyrosine, Bacopa monnieri, and caffeine, and markets it toward focus and mental energy.[4]

Based on the product range visible online, Coolkin’s positioning can broadly be described as:

• Everyday wellness — vitamins, antioxidants, and nutritional supplements.
• Preventive/general health support — products marketed around heart, eye, immune, and general wellness.
• Sports nutrition — products such as creatine.
• Beauty and wellness — supplements positioned around skin and related benefits.
• Weight and metabolism — products such as apple-cider-vinegar and fat-burning supplements.
• Cognitive performance — nootropic-style products marketed for focus and mental energy.

Rather than concentrating on one narrowly defined ingredient or demographic, Coolkin appears to use a multi-category supplement-brand strategy.

Coolkin has a noticeable presence in Philippine online commerce. Searches of Philippine marketplaces show multiple Coolkin products being offered in categories such as general health, sports nutrition, and dietary supplements.[2]

The brand also appears in the Philippine Intellectual Property Office’s trademark publications. A 2025 IPOPHIL publication lists COOLKIN under Peng, Yi [CN], application number 4/2025/00504291, in Class 5.[2]

This serves as evidence of the brand’s formal trademark activity in the Philippines, but it does not by itself establish that Coolkin is a Philippine company.

Coolkin appears to rely heavily on e-commerce distribution. Its products are visible through third-party marketplace sellers rather than through a clearly documented, centralized corporate retail network.

This creates an important distinction between Coolkin as a brand and individual sellers offering Coolkin products online. For example, Philippine marketplace listings show Coolkin products being sold by different storefronts, including stores specializing in health and fitness products.[2]

Consequently, the existence of a product listing does not necessarily mean that the particular seller is owned or operated directly by Coolkin.

One of the biggest gaps in the publicly available information is corporate transparency. There is not enough reliable public documentation to confidently state that Coolkin has a particular founding year, headquarters, number of employees, annual revenue, manufacturing facility, or parent corporation.

Statements regarding a specific founding date or location cannot be verified without additional primary-source evidence. The 2025 U.S. trademark record identifies Peng, Yi as the applicant for the supplement-related COOLKIN mark, while the Philippine trademark publication identifies the same applicant as [CN], but these records alone do not provide a complete corporate biography.[1]

Publicly accessible marketplace information does not provide enough reliable evidence to establish that all Coolkin products are manufactured by the same factory or company.

This is especially relevant because dietary supplements can be manufactured by third-party contract manufacturers. A brand’s trademark owner, product marketer, importer, distributor, and actual manufacturer can therefore be different entities. For due diligence, the most useful documents would be product labels, manufacturer/importer information, certificates of analysis, FDA registrations where applicable, and trademark/company records for the specific market.

Coolkin has achieved a presence across several online shopping ecosystems. Marketplace listings show products in multiple supplement categories, and some individual listings have accumulated consumer reviews and ratings. For example, Philippine Shopee listings show Coolkin astaxanthin products and other supplements being offered by sellers with substantial marketplace activity.[2]

However, marketplace ratings should not be confused with scientific validation or regulatory approval. A high seller rating primarily indicates the marketplace experience associated with that seller/product listing.

There is another important issue for anyone researching Coolkin. The name COOLKIN has been used for different product categories and trademark applications. An older U.S. registration belongs to a jewelry/watch-related mark owned by Liu, Ying, while the newer Peng, Yi application covers dietary supplements.[1]

Therefore, references online to “Coolkin company history” can potentially mix information belonging to unrelated businesses or trademark owners.

1. COOLKIN Trademark Application of PENG, YI – Serial Number 98946510 :: Justia Trademarks
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3. Coolkin Fish Oil Premium Omega 3 3600mg – Brain,Heart and Skin Health – with EPA & DHA(30/60/120pcs) – Walmart.com
4. Promo Coolkin Usa Neurooctane Brain Booster With Bacopa & Noopept Capsules Brain Health Suplemen Otak – 60 Caps Diskon 36% Di Seller Limitless Gym Store – Dauh Puri Klod Atau Kelod, Kota Denpasar | Blibli