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Nutrition in Focus

Stay informed with the latest in nutritional research, product insights, expert guidance, and health tips from Allergy Research Group. Follow our blog for in-depth articles, cutting-edge science, and practical advice on living your healthiest life.

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  • Beyond the Uterus: Why Progesterone Still Matters After Hysterectomy

    Beyond the Uterus: Why Progesterone Still Matters After Hysterectomy

    • Bone Health
    • Brain Health
    • Cardiovascular Health
    • Cognitive Health
    • Health Education
    • Hormone Health
    • Mood Support
    • Women's Health

    The idea that women without a uterus don’t need progesterone is misleading. While progesterone is no longer required to protect the endometrium after hysterectomy, it still plays important systemic roles throughout the body. Progesterone receptors exist in the brain, bones, breasts, blood vessels, and immune cells, meaning it can influence mood, anxiety, sleep quality, cognition, bone formation, breast comfort, inflammation, and metabolic and cardiovascular function. Data shows the therapeutic use of bioidentical progesterone in the right context, though it is not a cure-all and must be paired with healthy  lifestyle choices. 

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  • Estrogen: No Black Box Warning—Now What?

    Estrogen: No Black Box Warning—Now What?

    • Bone Health
    • Cardiovascular Health
    • Cognitive Health
    • Health Education
    • Hormone Health
    • Mental Health
    • Mood Support
    • Women's Health

    For more than two decades, fear stemming from early, oversimplified interpretations of the Women’s Health Initiative led many women and clinicians to avoid hormone replacement therapy, culminating in a black box warning on estrogen. In 2025, the FDA removed that warning for estrogen-only therapies, reflecting clearer evidence that risks depend heavily on age, timing, hormone type, and route of administration—not the universal danger once assumed. Updated research shows that starting hormone therapy within ten years of menopause, using bioidentical formulations, and choosing non-oral routes can significantly reduce risks, while estrogen-only therapy has not been shown to raise breast cancer risk. The label change does not mean hormone therapy is risk-free, but it does open the door to individualized, evidence-based decision-making. With better data and more nuance, women and clinicians can move forward with informed conversations rather than fear-driven avoidance.

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  • Better Together? Combining Vitamin D3 with K2

    Better Together? Combining Vitamin D3 with K2

    • Bone Health
    • Nutritional Supplements

    Vitamin D3 and K2 are essential nutrients that work together to promote bone density and cardiovascular health. While Vitamin D3 enhances calcium absorption, Vitamin K2 ensures that calcium is properly directed to the bones and teeth rather than accumulating in soft tissues and arteries. This article explores the unique roles of these vitamins, the science supporting their combined use, and why incorporating both into your supplement routine—especially high-dose Vitamin D3—is a wise choice for overall health, particularly for bone strength and heart function.

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