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Insufficient thymidine can result in DNA strand breaks.30 If DHFR is being kept busy recycling BH2 back to BH4, it has reduced capacity for the Thymidylate cycle

It's a humectant that pulls and holds water in the skin to help with hydration, plumpness, and reduce transepidermal water loss

According to research from Harvard Medical School, combining periodic injections with daily sublingual supplementation helps certain populations maintain stable B12 levels more effectively than either approach alone

To make the temptation even more intense, these compounders know that the people they turn away have easy access to a gray-market supply

NRF2, A transcription factor for stress response and beyond

This action on thymic function might explain the observed improvements in T-cell mediated immunity