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Not all iron is the same. Heme iron — found in animal sources — is absorbed at approximately 25 percent. Non-heme iron — found in plant sources and in most iron supplements, including ferrous sulfate — is absorbed at 17 percent or less, and that rate drops further when taken with coffee, calcium, or high-phytate foods like whole grains. For women who lose iron monthly through menstruation and face increased iron demands during pregnancy, the form of iron matters as much as the amount. A supplement with poor absorption often compensates by delivering a dose large enough to overwhelm the gut — which is why GI distress is so common with standard iron supplements and almost absent with whole-food heme iron sources.†

Mom brain is real — but the name undersells what is actually happening. Pregnancy triggers one of the most significant episodes of brain reorganization in a woman's entire life, comparable in scale only to the brain changes of puberty and adolescence. Gray matter reorganizes across most of the cerebral cortex. Choline, the nutrient that is the direct precursor to the memory neurotransmitter acetylcholine, is depleted at a rate that most prenatal vitamins do not adequately address. Creatine demand increases substantially. And in the postpartum period, sleep deprivation compounds all of it. This is not a personality quirk. It is a nutrient and neurological story — and it deserves to be told accurately.

Most supplement research was built on male subjects. The gap is not a conspiracy — it reflects decades of research methodology that defaulted to male bodies as the standard. But the practical consequence is real: women metabolize, absorb, and respond to certain key nutrients differently than men, and those differences have direct implications for which supplements matter most and why. Three are worth understanding in detail: creatine, iron, and ashwagandha.† Learn more. 

Memory lapses, word-finding difficulty, and reduced processing speed often appear years before the hot flashes and night sweats most people associate with perimenopause. This is not early-onset dementia and it is not anxiety. It is the direct result of estrogen receptor signaling shifting in the hippocampus and prefrontal cortex — the brain regions most responsible for memory encoding and executive function. The cognitive piece of perimenopause arrives first because those brain regions are among the densest in estrogen receptors, and they feel estrogen's variability before the rest of the body does.†

The cognitive shift many women notice in their mid-to-late 30s is real, measurable, and not a sign that something is wrong. Estrogen modulates dopamine and serotonin activity in the prefrontal cortex, the brain region responsible for working memory, sustained attention, and decision-making. As estrogen becomes more variable during the early perimenopausal window - which can begin years before noticeable physical symptoms - the cognitive functions that depend on stable dopaminergic signaling are the first to shift. This is not a motivation problem. It is a cellular nutrition conversation.†

NAD+ is a coenzyme present in every living cell. It is required for cellular energy production, DNA repair, and the signaling processes that regulate how cells age. Levels decline with age - measurably so in women from the mid-30s onward - and that decline affects everything from physical energy to cognitive clarity. NAD+ supplementation, specifically through the precursor nicotinamide riboside (NR), is one of the most studied approaches to supporting cellular NAD+ levels in aging adults.†