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Pregnant and breastfeeding individuals have increased requirements for many B vitamins, and indeed these vitamins are routinely included in prenatal supplements

If your levels were very low, this early phase can feel especially noticeable

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Studies confirm 50% drops by midlife, linking to aging symptoms.[1][9] Restoring NAD+ has been shown in animal studies to improve lifespan and healthspan, with human trials indicating benefits in muscle function and cognitive performance

If you already have a diagnosed deficiency under NHS care and your symptoms return before your next scheduled dose, that is a conversation to have with your GP, who can review the schedule