We get asked this a lot: why these nutrients, in these amounts? It's a fair question. The supplement world is full of megadoses and proprietary blends that leave you guessing. We wanted to do something different, so here's the honest reasoning behind our formulation.
The philosophy: functional, not overwhelming
Our goal was never to cram in the highest possible amounts of everything. It was to create a daily formula that meaningfully supports the nutrients most women are actually lacking, without causing digestive upset, without interfering with other supplements or medications, and without the diminishing returns that come with excessive doses.
We looked at the research on what women commonly miss in their diets, what becomes harder to absorb or retain with age and hormonal changes, and what amounts are genuinely useful for long-term daily use.
B Vitamins: The energy conversion team
B vitamins don't provide energy directly, they act as coenzymes, unlocking the chemical reactions that convert food into cellular fuel. Without adequate levels, this process slows down, and you feel it as fatigue, brain fog, and that dragging feeling no amount of coffee fixes.
Because B vitamins are water-soluble, your body doesn't store them. What you don't use, you excrete, which is why gaps develop so easily, especially during stress, hormonal changes, or when dietary quality slips.
Vitamin B1 (Thiamine) – 100% RDI
Thiamine is where carbohydrate metabolism begins, essential for converting glucose into ATP, your cells' energy currency. It also supports nervous system function and neurotransmitter synthesis. We include 100% RDI because deficiency is more common than people realise, particularly among women under high stress (which increases thiamine turnover) or those limiting carbohydrates.
Vitamin B3 (Niacin) – 64% RDI
Niacin is a precursor to NAD, a coenzyme involved in over 400 reactions, including energy extraction and DNA repair. NAD levels naturally decline with age, making adequate niacin intake foundational for sustained energy. At 64% RDI, we're providing substantial support while staying well below doses that cause flushing.
Vitamin B5 (Pantothenic Acid) – 37% RDI
B5 produces Coenzyme A, a molecule at the heart of how your body turns food into fuel, involved in fatty acid synthesis, ATP production, and carbohydrate metabolism. It's widely available in foods, so 37% RDI serves as a reliable daily top-up without unnecessary excess.
Vitamin B7 (Biotin) – 33% RDI
Beyond its reputation for hair and nails, biotin's primary role is metabolic, regulating glucose production and fat metabolism. This directly impacts blood sugar stability and those mid-afternoon energy dips. At 33% RDI, we're providing consistent support for these processes.
Vitamin B12 – 100% RDI
B12 is essential for red blood cell formation (which delivers oxygen to tissues) and nervous system maintenance. Here's the challenge: absorption declines significantly with age as stomach acid and intrinsic factor decrease. By your 40s, you may eat enough B12 but absorb far less. We include 100% RDI because this is one vitamin where full supplementation genuinely matters, especially for women over 35 or those on plant-based diets.
Why these amounts work together
B vitamins are interconnected, each supporting the others. Our approach provides full coverage where deficiency is common (B1, B12), substantial support where the vitamin is central to energy (B3), and thoughtful top-ups where diet typically covers the baseline (B5, B7). A reliable foundation, not a megadose.
Magnesium: The most important 20%
We include 20% of the RDI for magnesium. Why not more?
Magnesium is involved in over 300 enzymatic reactions in your body including energy production, muscle relaxation, nervous system function, sleep quality. It's genuinely important. But here's the thing: higher doses often cause digestive discomfort or a laxative effect, which defeats the purpose of a daily supplement.
Around one in three Australian adults don't meet their estimated average requirement for magnesium. For most women, a 20% top-up, delivered in well-absorbed magnesium citrate, is enough to meaningfully close that deficit without overwhelming your system. It's a thoughtful daily contribution, not a therapeutic megadose.
For foundational support, this amount does the job comfortably without the overwhelm.
Chromium: The blood sugar stabiliser
We include 100% RDI of chromium picolinate because its role is specific and well-established: enhancing insulin activity to help glucose move from your bloodstream into your cells for energy.
As women age, and especially during perimenopause, insulin sensitivity naturally declines. This often shows up as energy crashes after meals, increased sugar cravings, and difficulty maintaining focus. Chromium helps smooth this out.
Thyroid support: Iodine and Selenium
Your thyroid sets the pace for your metabolism. Iodine (50% RDI) and selenium (43% RDI) work together to support normal thyroid hormone production. Both are commonly low in modern diets, particularly for women, and we've included them in supportive amounts appropriate for long-term use - not excessive, not inadequate.
Zinc: Quiet but essential
At 37% RDI, zinc gluconate supports three areas that become increasingly important as women age: immune function, skin health, and hormone signalling.
Immunity that adapts with you
Zinc is essential for the development and function of immune cells, particularly the T-cells and natural killer cells that form your first line of defence. As we age, immune function naturally declines (a process called immunosenescence), making adequate zinc intake more important, not less.
Research consistently shows that even mild zinc deficiency impairs immune response, while sufficient intake supports faster recovery and better resilience to everyday challenges. At 37% RDI, you're getting a meaningful daily contribution that helps close the gap without the digestive discomfort that higher doses can cause.
Skin health from the inside
Zinc plays a central role in skin integrity, wound healing, and the regulation of inflammation. It's involved in collagen synthesis, oil gland function, and the turnover of skin cells, all processes that slow with age and hormonal shifts.
For women experiencing hormonal acne, slower healing, or changes in skin texture, zinc status is worth paying attention to. It won't replace a good skincare routine, but it supports the cellular processes that determine how your skin looks and recovers.
Hormone signalling
Zinc is required for the production and regulation of multiple hormones, including those involved in thyroid function, insulin activity, and reproductive health. It also supports the enzymes that help metabolise and clear hormones from your body. This is an often-overlooked part of hormonal balance.
The bigger picture
Every nutrient in our Spark formula was chosen because it addresses something most women genuinely need, at a dose that makes sense for daily use over months and years. No fillers, no token amounts, no megadoses for marketing appeal.
Just what's actually useful.
