Before her first son arrived, Dr. Doireann O’Leary had some concerns about how the demands of motherhood might impact her skin, hair, and nails. To proactively address these concerns, she delved into researching supplements with a strong evidence base for enhancing the skin’s radiance.


However, she couldn’t find a brand without added ingredients such as biotin, which can cause acne and disrupt lab test results, potentially leading to the misdiagnoses of a heart attack and thyroid disease. She also faced another challenge in her search: finding a tasty collagen powder! Most collagen supplements were in pill form, too, requiring a twice-daily intake—something she knew she couldn’t fit into her schedule.


Recognising the huge potential to harness the abundant resources of our native shores, Dr. Doireann collaborated with a local team in Wexford to manufacture her bespoke hydrolysed marine collagen and Vitamin C under Supplements Made Simple.


Following months of development and testing, Dr. Doireann first launched her Marine Collagen with Vitamin C daily supplement in July 2023. She knew once people tried it, they’d love it – because she herself had experienced visible results after taking it for six months. Not only that, but with a refreshing taste and simple dose, it suited her busy lifestyle.


Her initial launch was a great success. Now, less than four months down the road, Dr. Doireann is not only relaunching her inaugural evidence-based Collagen and Vitamin C under Supplements Made Simple, but also introducing a fresh innovation – Collagen Plus with Vitamin CThis addition provides customers with a variety of flavours and dosage options, enabling them to tailor their choices to their unique skincare needs and goals.

“The original strawberry and lemon flavour Marine Collagen with Vitamin C has been hugely popular with my customers; they’re seeing results for themselves with increased skin radiance and elasticity, reduced fine lines and wrinkles as well as improved hair and nails,” says Dr Doireann. “The evidence shows that doses ranging from 2.5g to 10g of hydrolysed marine collagen achieve cosmetic dermatological results”

Both the original Marine Collagen with Vitamin C and the new Collagen Plus with Vitamin C are manufactured using science-backed hydrolysed marine collagen, include vitamin C for added collagen matrix support, are scientifically proven to reduce fine lines and wrinkles whilst increasing hydration and elasticity of the skin, and can be taken at one to two sachets daily, meaning customers can take doses of 2.5g to 10g, depending on their preferences.


The Supplements Made Simple range is developed personally by Dr. Doireann and is scientifically proven to improve health. The full range includes Vitamin D, Folic Acid, Omega 3 Fish Oil, Magnesium, a Vitamin D3 Spray, a Vitamin B12 Spray, the bestselling Marine Collagen with Vitamin C, and the brand-new Collagen Plus.


Collagen Plus, €54.99 for 30 sachets, Marine Collagen with Vitamin C, €39.99 for 30 sachets, and the full Supplements Made Simple range is available in pharmacies nationwide and online at